BOMBYLIDAE. 25 



Psiloccphala Zett., which does not appear to be well founded, should 

 be admitted, some species with naked faces would be located in it. 



Fam. XXI. BOMBYLIDAE. 



Charact. — Three basal cells much prolonged ; anterior intercalary vein 

 present almost without exception, the posterior always wanting ; 

 third joint of the antenna simple; empodium quite rudimentary. 



This, again, is a family exceedingly rich in the most varied 

 forms. A distribution into several tribes would therefore be very 

 useful ; the two sections hitherto adopted, one of which comprises 

 the genera grouped round the genus Bombylius, having a long 

 proboscis, while the second consists of genera more allied to the 

 genus Anthrax, having a short proboscis, do not appear sufficient 

 to embrace all the forms which have hitherto been discovered. I 

 am unable to give a better distribution, and I think it will not be 

 possible to do so^until the number of sections is increased to at 

 least five or six. The genera of Bombylidce are as follows: Bom- 

 bylius Linn., Eurycarenus Loew, Triplasius Loew, Systcechus 

 Loew, Sparnopolitjs Loew, Dischistus Loew (= Bombylisoma 

 Bond.), Parisus Walk., Choristus Walk., Heterostylum Macq., 

 Lasioprosopa Macq., Adelidea Macq., Acreotrichus Macq., 

 Apatomyza Wied., Thlipsomyza Meig., Amictus Wied., Mega- 

 palpus Macq., Phtiiiria Meig., Cyclorhynchus Macq., Dasypal- 

 pus Macq., Crocidium Loeiv, Geron Meig., Apolysis Loew, Oli- 

 godranes Loew, Mulio Latr. (= Glossista Bond.), Chalcochiton 

 Loeiv, Callostoma Macq., Sericosoma Macq., Toxophora Meig., 

 Eniconeura Macq., Lepidophora Macq., Corsomyza Wied., Ecli- 

 mus Loew, Systropus Wied., Dolichomyia Wied., Usio Latr., 

 Platypygus Loew, Cyrtosia Perr., Pleas Latr., Cyllenia Latr., 

 Lagochilus Loew, Anisotamia Macq., Lomatia Meig., Oncodo- 

 cera Macq., Plesiocera Macq., Ligyra Newm., Anthrax Scop., 

 Argyromosba Schin., Xeuria Newm., Comptosia Macq., Lito- 

 riiynciius Macq., Spogostylum Macq., Enica Macq., Tomomyza 

 Wied., Argyrospila Rond., Exoprosopa Macq., Autonia Loew. 



The X. A. Bombylidce which I have seen may be distributed 

 amongst the following genera: 1. Bombylius Linn., 2. Systoschus 

 Loetv, 3. Sparnopolius Loew, 4. Lepidophora Wesiw., 5. Toxo- 

 pHora Meig., 6. Geron Meig., 1. Systropus Wied., 8. Ploas 



