Search Help New search |
Results 261-280 of 1567 for « +text:ants » |
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
iv. In many cases, the structure of particular parts and organs of the body differs in the sexes. As the facts connected with this part of our present subject are extremely numerous and various, it will be convenient to subdivide it, and consider the sexual characters that distinguish the Head, Trunk, and Abdomen of insects, and their several appendages. 1. The Head. This part in some females is considerably larger than it is in the male. This is the case with the ants, and several other
|
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
females are merely rudiments. This is the case, also, with some of the Ichneumonid b. In the tribes of Ants, Termites, c. the neuters or workers are without wings. Amongst the plant-lice (Aphides) there are individuals of both sexes, some of which have wings, and others notc. Amongst the Coleoptera, the female of Tenebrio Molitor, the common meal-worm, has elytra and no wings; while the male has bothd. Sometimes these organs vary in size in the sexes: thus in Aradus Betul F., a kind of bug, the
|
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
closing over it. The tongue of some Hymenoptera also is retractile within the mouth. When ants are disposed to drink, says M. P. Huber, there comes out from between their lower jaws, which are much shorter than the upper, a minute, conical, fleshy, yellowish process, which performs the office of a tongue, being pushed out and drawn in alternately: it appears to proceed from the lower-lip. This lip has the power of moving itself forwards in conjunction with the lower jaws: and when the insect wishes to
|
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
terminating at the sinus of the eyes in an elevation for the site of the antenn . In the ants also (Formicid ), a Kirby Mon. Ap. Angl. i. t. i. Melitta. *. b. f. 3. b PLATE VI. FIG. 4. b. c PLATES VI. VII. c. d VOL. II. p. 317 . [page] 48
|
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
head, forming its sides and posterior angles, and including the hinder part of the eyes, the vertex, and the occiput. They seldom exhibit any tangible character, except in certain ants (Atta Latr.), in which their angle terminates in one or two strong spines, giving the animal a most ferocious aspect; and in that remarkable genus Corydalis they are armed below with a tooth or point, which was not overlooked by De Geera. viii. Oculib. I must now call your attention to organs of more importance
|
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
and the Sphingid , they are not easily seen. In the Hymenoptera they are usually very conspicuous, but in Larra and Lyrops, two genera of this order, the posterior pair are scarcely discernible; and in the neuter ants they are quite obsolete. In the Diptera, though many genera are furnished with them, yet many also want them; amongst the rest Latreille's Tipulari , and all the horse-flies (Tabanus L.). The Pupipar (Hippobosca L.) usually have none; but in Ornithomyia avicularia, one of the tribe
|
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
larity; and others, when they elevate one depress the other, and so proceed as if balancing themselves by means of these organs like a rope-dancer. I have before stated to you how by motion of their antenn ants and bees communicate their wants or discoveries to each other, or make inquiry concerning any thing they wish to knowa. But as I shall have occasion to make some further remarks upon this subject, when the senses of insects are under discussion, I shall for the present take my leave of
|
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
approaching to the figure of a sphere; in the ants, Scoli , crane-flies, c. to that of a cube. The upper part of it in many Ichneumonid , [page] 53
|
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
distinct motion, will not readily separate from each other, and in some cases exhibit no pectoral suture between them. Sometimes, however, these two last segments are more prominently distinguished: in Lytta, Mylabris, and other vesicatory beetles, they are separated below by an incisure, or rather the first or mid-leg segment, is not nearly so elevated as that of the hind-legs. In some ants (Atta Latr.), in the neuters, there is no distinction of segments in the trunk; but in others (Formica
|
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
must be proved that in the perfect insect these segments in some manner become the back of the trunk and bear the wings. This would not be more wonderful than many changes that are known to occur in insects. b Latreille, Organization ext rieure des Ins. 173 . c For instance Meloe, the female glow-worm, Lyg us brevipennis, Ephemera diptera, Cynips aptera, neuter ants, c. c. VOL. III. 2 Q [page] 59
|
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
the cubit of many Lepidoptera, a Most of Latreille's genera of ants are confirmed by differences in their spurs. Thus Formica is 1:1:1; Ponera 1:2:2 with the internal intermediate one pectinated: Myrmica 1:2:2 with all symmetrical, c. [page] 68
|
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
individual joints it may be said in general that they are rather triangular, with an anterior sinus for the reception of the succeeding joint: the first joint usually departs most from this form; in the bees it is commonly much larger than the rest, especially in the last pair of legs, and nearly forming a parallelograma; in Euglossa it is trapezoidal; in the majority nearly linear or filiform. With regard to their termination in Brachycerus and some ants (Ponera, Myrmica, c., Latr.) the three
|
21% |
A793.3
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 3.
Text
hind in a piece resembling in some measure the scutellum of the Stratyomid and similarly armed with a pair of spinesa: in E. aculeata the sides of the abdomen, under the plate, have a number of longitudinal folds like those of Phrynus. In Cryptocerus, a genus of ants peculiar to South America, the first segment, not reckoning the pedicle, forms almost the whole back of the abdomen, and the three last are so minute as scarcely to be distinguishable. Nothing very remarkable is exhibited by the
|
21% |
A793.4
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 4.
Text
, from which it seems to result that insects may be taught some things, and acquire habits not instinctive. They could scarcely be brought from their wild state, and domesticated, as bees have been so universally, and both ants and wasps occasionallyb, without some departure from the habits of their wild state; and the fact of the corsair-bees, that acquire predatory habits before describedc, shows this more evidently: but one of the most remarkable stories to our purpose upon record, is that of M
|
21% |
A793.4
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 4.
Text
will make him abstain from the most tempting dainties: and in like manner a bee will quit the nectary of a flower, however amply replenished with sweets, if alarmed by any interruption. The ants on which Buonaparte amused himself with experiments at St. Helena, though they stormed his sugar-bason when defended by a fosse of water, controlled their instinct and desisted when it was surrounded with vinegara: and in the remarkable instance communicated to Dr. Leach by Sir Joseph Banks, the
|
21% |
A793.4
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 4.
Text
excrement as sweet as honey, of which the ants are so fondc, which is ejected only not only at the anal passage, but, in many, by two little a Ramdohr, t. xix. f. 1. b Reaum. i. 143 t. v. f. 9. c VOL. II. p. 88 . [page] 12
|
21% |
A793.4
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 4.
Text
which an acid of this description, secreted in its sialisteria, is employed by a moth to soften cocoonb; and Lister mentions a species of Iulus which produced one resembling that of antsc; but this last is the most powerful of all. The fact that blue flowers when thrown into an ant-hill become tinged with red has been long known; but Mr. Fisher of Sheffield, about l670, seems to have been the first who ascertained that this effect is caused by an acid with which ants abound, and which may be
|
21% |
A793.4
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 4.
Text
upon the knotgrass; but in no insect is it so striking as in the female of the white ants, whose wonderful increase of size after impregnation I have related to you on a former occasionc. I shall conclude this subject with a few observations upon ovo-viviparous insects; supposed neuters, and hybrids, which, though they do not fall in regularly under any of the foregoing heads, may very well have a place in this letter. 1. It has already been observed that there are a few ovo-viviparous insectsd
|
21% |
A793.4
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 4.
Text
to those of ants, in which the worker and the female differ still more materially. My reason for introducing this subject here, is to observe to you that I have some grounds for thinking that this system extends further than is usually supposed, and that to each species in some Coleopterous and other genera there are certain individuals intermediate between the male and female; this I seem to have observed more especially in Copris and Onthophagus. For in almost every British species in my
|
21% |
A793.4
Beagle Library:
Kirby, William and Spence, William. 1815-26. An introduction to entomology. 4 vols. London: Longman, Rees, Orme, Brown, and Green. vol. 4.
Text
with a tarsus. The diseases of insects which arise from some internal cause are not very numerous. The first that I shall mention is a kind of vertigo. Ants have also their maladies, says M. P. Huber: I have noticed one extremely singular; the individuals attacked by it lose their power of guiding themselves in a straight line, they can walk only by turning round in a circle of small diameter and always in the same direction. A virgin female shut up in one of my glasses was seized on a sudden
|