[116]

Cauliflower Cot

Oct 16th

All in same position

Filament attached to axis

 8°. 5'  Axis of

8. 30'   to light & left

 do  do.  8 55 

 do do.  9. 24 

 to left do 10' 0' 

 to left 10. 30  & light

 same course much to left 11°. 0 

11° 35'.   a trace from light but day became cloudy

12. 10' short way back & from light

12. 41 back & to left — short. distance

1° a very little from light

1. 37 from light back & parallel—

2° 3 a little way to west

2. 35 to light straight

3° 3' to west very short distance

3. 35 to west & from light (E)wrd

3' 37 slided glass fresh dot

3. 58 very short way to right left & from light.

4 38 to right & from light

5. 35 from light

7" 20' from light & far

8° 55 a very little way from light

10. 20   from light & to the right.

Oct 17th. 6° 45' [sketch] →

8° 35

On Horizontal glass

(used)

(Movement of stem with Light)

[116v]

74 86

[text excised] from India in collection

[text excised] of the proportional numbers

[text excised] brought before the Entomological

[text excised] dmitted that with the males of most hepi=

[text excised] adult or imago state, the are

[text excised] this fact was attributed boy

[text excised] retiring habits of the fe=

[text excised] merging earlier from the cocoon

[text excised] well known to occur with

[text excised] insects. So that, for instance as M. Personat

[text excised] byx Yamamai, as Mr. Personat

[text excised] beginning of the season, and

[text excised] lost, from the want, of males. 62*(xx)

[text excised] myself that these causes suf=

[text excised] xcess of males in the cases

[text excised] of butterflies that which are extremely common

[text excised] ntries. Mr. Minton who has

[text excised] uring many years to the smaller

[text excised] when he collected them in the

[text excised] that the males were ten times

[text excised] cles, but that since he has

[text excised] em moths from the caterpillar

[Descent 1: 310: "Mr. Wallace60 states that the females of Ornithoptera crœsus, in the Malay archipelago, are more common and more easily caught than the males; but this is a rare butterfly. I may here add, that in Hyperythra, a genus of moths, Guenée says, that from four to five females are sent in collections from India for one male.
When this subject of the proportional numbers of the sexes of insects was brought before the Entomological Society,61 it was generally admitted that the males of most Lepidoptera, in the adult or imago state, are caught in greater numbers than the females; but this fact was attributed by various observers to the more retiring habits of the females, and to the males emerging earlier from the cocoon. This latter circumstance is well known to occur with most Lepidoptera, as well as with other insects. So that, as M. Personnat remarks, the males of the domesticated Bombyx Yamamai, are lost at the beginning of the season, and the females at the end, from the want of mates.62 I cannot however persuade myself that these causes suffice to explain the great excess of males in the cases, above given, of butterflies which are extremely common in their native countries. Mr. Stainton, who has paid such close attention during many years to the smaller moths, informs me that when he collected them in the imago state, he thought that the males were ten times as numerous as the females, but that since he has reared them on a large scale from the caterpillar state, he is convinced that the females are the most numerous.
60 'Transact. Linn. Soc.' vol. xxv. p. 37."]