327 



— Apices of sheaths of fore legs not extending to apices of wing sheaths 



11 



11. Middle of wing sheath with a small distinctly raised area; apical ab- 

 dominal segment truncated, the upper pair of thorns directed 

 uijward ProctacantJius milherti (p. 339) . 



— Middle of wing sheath without raised area; apical abdominal seg- 



ment not truncated, the upper pair of thorns directed backward 

 and slightly curved downward Asilus notatus (p. 340). 



I have not included any species in the key of which I have not ex- 

 amined specimens, preferring not to use descriptions which I miglit 

 misinterpret. I have, however, indicated in the text characters whicli 

 appear to be available for the separation of Systaxhns or ens from B-v- 

 oprosopa fasciata and Apliwhantus vitis from Sparnopolius fulviis. 



Brax lateralis Macquart has been recorded by Titus as predaceous 

 upon Ligyrus spp.* Unfortunately the figures and descriptions of the 

 larva and pupa given by him are too vague to permit my discovering 

 their distinctive generic characters. 



BOMBYLIID^ 



Many species of this family have been reared both in North Amer- 

 ica and in Europe, and the larvae have been found to be predaceous or 

 parasitic in all cases put upon record. Wilhston gives a summary of 

 tlieir larval habitsf. Apha-bantns and Systaxhns are predaceous on 

 egg-masses of the locust Calopteniis spretiis. Anthrax is recorded as 

 parasitic upon three genera of Hymenoptcra — Mcgacliile, Osmia, and 

 Odynerus — and three genera of Lepidoptcra — Mamestra, Noctna, and 

 Agrotis; Spogostyliiin upon four genera of Hymenoptcra — PclopTus, 

 McgacJulc, Ceuwnus, and Osmia — and two genera of Coleoptera — 

 Cicindcla and Calicodoma; Bomhylius upon the hymenopterous genera 

 Andrena and Colletcs; Toxophora upon the hymenopteran Bumenes; 

 and Systroptis on the lepidopteran Limacodes; while Callostoma is 

 predaceous on the egg-masses of the locust Caloptenns italiccu. 



Vassiliew, in a short note on the biology of some European species 

 of Anthrax, records the occurrence of niorio Linn, and vclutina Fall, 

 as secondary parasites of Masycera sylvatica Fall., a tachinid parasite 

 of Dendrolinus pini Linn. J 



*Some Miscellaneous Eesults of the Work of the Bureau of Entomology. Bull. 53, 

 Bur. Ent., U. S. Dept. Agr., 1905, p. 15. 



' tManual of North American Diptera, p. 213. 1908. 



JBeitrag zur Biologic der Gattung Anthrax Scop. (Fam. Bombyliidae.), Zeitschr. 

 fur Wiss. Insektenbiol., Bd. 1, Heft 4, p. 174. 1905. 



