260 SYBPHID^. 



transverse veins of the middle, and a paler and more diffuse brown spot 

 on the disc near the tip. Alulae whitish. Halteres yellow. Abdomen 

 clothed in the middle part with whitish hairs, at the tip with black 

 hairs, and with tawny hairs towards the base, where there is a tawny 

 spot oil each side ; all the hairs pale tawny. Femora tawny at the base ; 

 anterior tibire ferraginous ; tarsi black, ferruginous towards the base. 

 Not common. (E.) 



Genus XIII. VOLUGEI.I=A. 



VoLUCELLA,Gf.i.(1776); Mlr.j Shr.f.b.; LL; Mg.; St. F.etSrv.; Ct. ; 

 Mq. ; Ztt. ; Bdn. Musca,'L.; Dg. ; Fb. : Schlb. ; Shr. i. a. ; Gm. ; 

 libst. Syrplms, Fb. ; Pz. ; Fin. 



Autennce artlculo quarto dursali, sexto plumoso. Ahe areola suhapicali 



inte(/ra, loho axillari distvicto, venis suhcostali et radiali aide nnu-giuem 



conjunctis. Ilalteres conspicuL 



Body broad. Head almost semicircular, somewhat contracted in 

 front ; epistoma much depressed above, conical and lengthened beneath, 

 notched at the tip ; peristoma oblong, naiTow, straitened in front, 

 but slightly inclined upwards. Eyes pubescent, bare in some species. 

 Labrum long, narrow towards the tip, which is notched. Lingua nar- 

 row, pointed, nearly as long as the labrum. Maxilte subidate, sliglitlj^ 

 curved, rounded at the tips, longer than the palpi. Palpi cylindrical, 

 short, narrow, pubescent, membranous at the tips, with a few hairs on 

 the side, almost half the length of the labrum. Labium semicylindrical, 

 twice the length of the labrum. Antennte foiu'-jointed, approximate, 

 inserted low in a cavity ; first and second joints small ; first slightly 

 cyathiform ; second broader, obliquely truncate, bristly, a little nar- 

 rower towards the tips ; third oblong, compressed, truncate beneath ; 

 foiu'th and fifth very small ; fourth seated on the base of the third ; sixth 

 setiform, thickly feathered ; its fringe above much broader tlian that 

 below. Thorax oval. Wings divaricate; subapical a reolet entire ; ax- 

 illary lobe distinct ; subcostal and radial veins meeting before they reach 

 the man/in. Alulae with fringed borders. Halteres uncovered. Abdo- 

 men almost oval. Legs rather stout. 



Male. Eyes almost contiguous. Plume of the antenna3 narrower 

 than that of the female. 



The species may be thus groaped : — 



a. Body oblong, almost smooth. Abdomen elongate oval, slightly 

 convex. Larvfe parasitic on those of wasps and hornets. Sp. 1. 

 a a. Body short. Abdomen very convex, almost globose. 



h. Body almost smooth. Larvae parasitic on those of wasps. 



Species 3, 3. 

 /; h. Body hairy. Larvic parasitic on those of hunibie-bccs. S}). 4. 



