LIST OF DIPTERA. 613 



105. Trupanea doesalis. 



Cinerea ; caput albidum ; thorax rubidus, fusco vittatus ; abdomen 

 fuscum, vitta dorsali cinerea, incisuris albidis; pedes rvji ; ahe 

 subjlavescentes. 



Trupanea dorsalis, Macq. Dipt. Exot. i. 2, 106, 36, pi. 9, f. 4. 



106. Trupanea poeeecta. 

 Trupanea porrecta, Diptera Saundersiana, Pt. 2, 126. 



Genus 4. ERAX. 



Corpus non depressum, nee cilia tuna. Facies valde prominens. 

 Maris sexualia magna, producta, fcem. terebra extensa. Alarum 

 vena radialis simplex ; cubitalis iurcata ; furca antica saspissiine 

 ramulum rejiciens. 



Erax, Scopoli ; Serville. Macq. Dipt. Exot. i. 2, 107. 

 Asilus p., Fabr. ; Wied. 

 Erax et Eristicus, Loew. 



Loew describes Erax and bis new genus Eristicus by the 

 following characteristics, but does not mention the types of either 

 genus : — 



Erax. 



Abdomen plus minusve compressum. 



Mas. Sexualia map;na, compressa, elevata. 

 Fcem. Sexualia longa, valde compressa. 



Erax, Loew, Linn. Ent. iii. 395, 3, 403. 



Eeisticus. 



Abdomen depressum. 



Mas. Sexualia latissima, valde incrassata, non elevata. 

 Fcem. Sexualia brevissima, plus minusve depressa. 



Eristicus, Loew, Linn. Ent. iii. 396, 4, 403. 



This genus appears to connect Mallophora and Trupanea with 

 the other Asilites, as regards the neuration of the wings. In Erax 

 the branch which is very generally emitted from the angle of the 

 fore fork of the cubital vein is only rudimentary, but in Trupanea it 

 is continued backwards to the radial, and thus the latter has the 

 appearance of being forked, and the cubital of being simple, and 

 connected with the radial by a short transverse veinlet. The 



