HYMENOPTERA. 87 
state of the young and the great activity of the predaceous imago, 
whilst the herbivorous Tenthredinidz, from their more perfectly or- 
ganised and active larvee and sluggish imago, appear to represent the 
Pecora at the end of the order. He considers the order as containing 
four principal divisions, which, from their habits, he names Raptatoria, 
Parasitica, /Edificatoria, and Plantivora, each being connected with 
the other three by means of transition groups. 
His more detailed view of the distribution of the families “ana- 
tomia externa, metamorphosi moribusque simul consideratis,” does 
not appear to be quite in accordance with the quaternary division 
mentioned above, being evidently artificially constructed, as appears 
from the numbers attached to the families. The following is a 
concise abstract of it : — 
I. Imago with petiolated abdomen. Larve apod, subyermiform. 
A. Imago predaceous, aculeate, solitary, fossorial. Larve insectiyorous, or 
eruciyorous. 
Fam. 1. Pompilini. 3. Mellinii, 7. Bembicini, 5. Pemphredonides, 
4. Sphegides, 2. Larrates, 6. Crabronides, 
B. Imago styliferous, tubuliferous or aculeated, solitary. Larvee erucivorous, 
or pupivorous. 
Fam. 8. Ichneumonides, 9. Braconides, 10. Evaniales, 20. Masarides, 
13. Psilides, 14. Tiphiales, 21. Nomadini, 11. Pteromalini, 18. Eu- 
menides, 12. Chrysidides, 17. Sapygini, 15. Mutillariz. 
C. Imago nest-building, living in society. Larve omnivorous. 
Fam. 19. Vesparia (sociales), 15. Formicarie. 
D. Imago nest-building, solitary or social, Larve mellivorous. 
Fam. 22. Andrenides, 23. Anthophorini, 24, Apiariz (sociales). 
E. Imago living in galls, with the abdomen compressed. Larve feeding on 
galls, 
Fam. 25, Cynipsex. 
IJ. Imago with sessile and depressed abdomen; oviduct spiral. Larvz gallivorous?. 
Fam. 26. Oryssini. 
III. Imago with sessile and depressed abdomen. Larve eruciform, pedate, plan- 
tivorous. 
Fam. 27. Siricides [ Uroceridx], 28. Tenthredinides, 
With the exception of the different location and juxtaposition of 
these primary groups the arrangement here given is not materially 
unlike that of Latreille. The section B appears to be a most ar- 
tificial assemblage, sufficient to prove, in connection with the admission 
of Dahlbom (that certain parasitic species occur in the raptatorial, 
mellivorous, and gallivorous groups, which nevertheless agree com- 
pletely in general habits, as, for instance, Psithyrus amongst the bees, 
&c.) that a distribution of the Hymenoptera, based upon natural habits 
G 4 
