[291]

(A)

Number genera with [illeg] 2 species (inclusive with wide ranges

[List]

[292]

(B)

Diff: countries

Small genera

It is really curious that in Waterhouses list there is only one or 2 curculionidum of aberrant genera with my red crosses

Those with red cross are most striking case of small genera with wide ranges.

+ I shd expect most 12 aberrant that 13 here on average 3.6. species

{See remarks BBB – are there broken genera

It wd be worth while to ask Waterhouse to go over these genera with me & see whether true whether natural genera, ie closely allied

[BBB: see CUL-DAR205.9.303-304]

[List and calculations]

 

[293]

(1

Schoenherr Genera et species Curculionidum, Catalogues ab. H. Jekel a [illeg] (1849 Parishs apud H. Jekel Via Fontaine – Moliere 20 (3f. 50 ct)

N.B I have included all the species & genera which are numbered including some not see by Schoenherr & the Linn which are numbered as intermediate. I have not included the species p. 260 of insects Divisions et genera

From the range of the species, I have divided the world out

1. America, whole – Perhaps if N. America had been left neutral ground it wd have been better.

2. Europe, Western Asia & Siberia & occasionally N. shores of Africa

3. Africa with Madagascar (perhaps if N. Africa had been neutral it wld have been better)

4. India, Malayan archipelago.

5. Australia with New Guinea.

Any genus with all its species confined to one of these regions of the world, I have considered inhabiting to same country: but after the genera are confined within much narrower limits, I have considered as sporadic, a genus inhabiting to or more of these regions. – No species seems common  to true. A possible source of error in that Schoenherr under his genera from their distribution.

A [illeg] genus may be large, as (genus 145) Naupactus with 139 species all S. America & Mexico. Genera (332) Otiorhynchus which is the largest genus with 260 species has only 1 or two wanderers from Europe & Siberia. On the other hand several very small genera have species inhabiting the central regions: but there is exceptions to rule.

The greater number of the genera are local, in proportion of 270/408; & even greater groups then genera now often local.

[illeg] (55) with 33 species from Philippines, & genus 71 with 15 from Madagascar, most striking cases of many species in smallish area.

 

[293v]

Waterhouse says Shoenherr no power of generalisation, & some of his higher groups very artificial.

 

[294]

Shoenherr

Total number of genera 660. I exclude divisions of

(1) genera, but take all those numbered, but not consecutively numbered.

Total no of species 6717

(2) average of species to genera 10.17

Number of genera with 1 species 252

(3) no of genera with more than 1 sp. 408

(4) Small genera with from 2-8 (inclusive of species inhabiting same great region of world 215 (having an average 3.57 species) including 768 species

(5) Smaller genera with from 2-8 inclusive species inhabiting different great regions of world 52, (having an average 4:40 species) including 229 species. Hence we see average of species gets greater as soon as range gets greater or same

(N.B. The species most seen by Schöenherr 14? be taken out of list & thus will alter whole tables)

Excluding genera with simple species these are 408 genera, having 6465 species, ie having on average 15.84 species.

(A) Genera inhabiting same great regions (excluding genera with 1 species & even three genera, which have simple wandering species) are 262 including 2121 species, ie having an average of 8.09 species

(B) Genera inhabiting different great regions (with same exclusion as before) then 146, including 4344 species ie an average 29.75 species.

If genera with wandering species be included (of which list given) then in (A) numbers will be 270 genera with 34.74 species, on average 12.86: and (B) will have 138 genera with 2991 species, having as an average 21.67 species each.

It will be fairest to take then last calculation with the wandering genera included.

 

[294v]

Summary & Conclusions

[294v2]

[Blank page]

[295]

(A)

List of genera with same species confined to N. or S. America, Europe Australia, Africa or any lesser district.

Same Country

[List]

 

[295v]

Genera inhabiting the small country with from 2-8 species

average no of species in these small genera 3.57

[calculations]

 

[296]

(B) (Same country)

[List]

 

[297]

(C)

same country

[List]

[298]

(D) (same country)

[List]

[299]

(E) same country

[List]

[300]

(F) same country

There is danger of genera having been made for country

(Addenda of doubtful species not counted in this list.)

[List]

 

[301]

Larger genera above & inhabiting one country

Great genera same country

After this I count N. America with S. America

[List]

 

[302]

Great genera same Region

[List and calculations]

 

[302v]

22 & 19

8

Shaler & Waterhouse