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 

 upward Proctacantlius 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 w'hich I miirht 

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

 appear to be available for the separation of Systcrchus oreus from Bx- 

 oprosopa fasciata and Apho'bantus mus from Sparnopolius fiilvus. 



Bras lateralis Macquart has been recorded by Titus as predaceous 

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

 larva ancl pupa given by him are too A^ague to permit my discovering 

 their distinctive generic characters. 



fe* 



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. Williston gives a summary of 

 their larval habitsf. Aplm^hantus and Systa^chus are predaceous on 

 egg-masses of the locust Caloptemis spretus. Anthrax is recorded as 

 parasitic upon three genera of Hyuicnoptcra — Mcgachilc, Osniia, and 

 Odyncrus — and three genera of Lcpidoptcra — Mamcstra, Noctiia, and 

 Agrotis; Spogostyhun upon four genera of Hyiiienoptera — Pclopa-ns, 

 Megachile, Cemonus, and Osmia — and tw^o genera of Coleoptera — 

 Cicindela and Calicodoma; Bomhyliiis upon the hymenopterous genera 

 Andrena and Collctes; Toxopliora upon the hymenopteran Bumcnes; 

 and Systropus on the lepidopteran Umacodcs; while Callostoma is 

 predaceous on the egg-masses of the locust Caloptemis italiccc. 



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

 of Anthrax, records the occurrence of niorio Linn, and veliitina Fall. 

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

 of Dendrolinus pini Linn.J 



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

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



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



tBeitrag zur Biologie der Gattung Anthrax Scop. (Earn. Bombyliidae.), Zeitschr. 

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



