46 



ASJLIl).*. 



Genus II. HENOPS. 



HENOPS, 111. mag. (1806); Mg. ; Fb. ; Flu.; Ztt. Musca p., L. 

 Syrphm p., Pz. Ogcode* p., LI. Opcodes, Mq. 



Corpus minoris magnitudinis, subglobosum, gibbuni, breviter pubescens. 



Color nigricans. Oculi mull, obscure fusci, unicolores. Antenna ad 



peristoma inserta. Al( vena tertia longitudinali simplici. 



Body small, gibbous, almost globose, downy. Head much con- 

 tracted in front. Eyes bare, almost contiguous. Ocelli 3, on the 

 crown. Peristoma small, round. Proboscis concealed. " Palpi short, 

 filiform. Labium very small " (Fb.). Antenna3 3-jointed, very small, 

 seated close to the upper border of the peristoma, nutant, inclined almost 

 perpendicularly downwards, slightly diverging; first joint very short, 

 patelliform ; second more oval ; third subulate, somewhat thickened at 

 the tip, which bears two little bristles. Thorax almost round, much 

 broader and thicker than the head; scutellum rounded. Wings lan- 

 ceolate, incumbent, oblique, longer than the abdomen, not pubescent 

 nor fringed ; third longitudinal vein simple. Alulae large, rounded, 

 quite concealing the little halteres. Abdomen oval, gibbous, very large, 

 with 5 segments, convex above, flat beneath. Legs slender. 



These flies resemble the Acrocera in general structure and in 

 habits. 



1. gibbosus, L. fn. 1815 (1761); Fb. ; Gm. ; Pz. ; Mg. ; Fin.; 

 LI. ; Mq. ; Ztt. leucomelas, Mg. ; Fin. marginatus, Mg. ; Ct. ! b. e. 

 110; Ztt. limbatus, Mg. Nigro-fuscus, antennis nigris, thoracis late- 

 ribus fulvo-maculatis et fasciatis, alis limpidis, abdomine fusco, seg- 

 mentorum marginibus posticis ventreque flavis, pedibus fulvis, femo- 

 ribus nonnunquam nigris. Long. 2^-3^; alar. 7-9 lin. 



Blackish-brown. Head prominent above the antennae. Peristoma 

 tawny. Thorax clothed with yellow hairs, having a tawny spot on each 

 side of the fore border, and an oblique tawny band at the base of each 

 wing. Wings and alulas colourless ; veins and halteres pale yellow. 

 Abdomen brown ; hind borders of the segments pale yellow ; underside 

 pale yellow, with a brown border. Legs tawny ; femora sometimes 

 black, with yellow tips. 



Not rare. (E.) 



FAMILY Y. ASILIDJB. 



Lch. comp. (1819); Ct. ; Wtw. RbmbyUaru p., Lm. 

 Empidia p., Efh. Asilici, LI. ; Fin. ; Mg. ; Mq. ; Ztt. ; Ags. ; Lw. 

 Sclerostoma p., Dmr. Asilica, Brin. Asilites, Nwm. Asilince, Edn. 



Corpus magnum atit medium, hirsutum. Frons et vertex impressa. 



