318 BRITISH SPECIES OF THE 



some being indistinct : legs long, formed for running or leaping : 

 onychii distinct, feathery : 1st joint of the hind feet shorter than i 

 the 2d, dilated : wings in repose lying flat on the back : the 1st : 

 main nerve short, not divided : axillary lobe rather large : calyptra i 

 nearly at their smallest, the interior auricle disappearing: the 

 larvae inhabit putrid substances. 



Synopsis of Indigenous Genera, 



(Snaked Sph^erocera. 

 with the basal joint scarcely distinct Spubescent;^ perfect . Borborus. 

 ( wings 



abortive . Apterina. 



'jointed at the base; 2d or principal vP^*"?^" ^'^^ ^^ 



LiMOSINA. 



cross-nerve of the wing 



oblique Heteroptera 



Gen. I. — Sph^rocera. 



Arista glabra quasi exarticulata : frons, scutellum setis 

 expertes : areola analis completa : nervus transversus 

 ordinarius ab alee margine remotus. 



Borborus, A. b. . Meig. VI. 200. 

 Sphaerocera . . . Macq. S. a B. II. 564. II. 

 Lordatia, Coprina . Rob. D. 808. VIII. 810. IX. 



Front much produced, flat, without long bristles : face very short, 

 concave : antennae reposed in deep lateral cavities : arista naked, 

 the 1st joint very minute: thorax with the numeral callosities 

 very protuberant, the suture before the wings deep, the sides of 

 the metathorax angular : abdomen broad, very flat, margined, the 

 1st segment almost concealed : middle shanks without lateral 

 bristles, hind pair ending in a curved spur : first joint of the hind 

 feet very much dilated : anal cell of the wing, and the small one 

 before it complete : principal cross nerve distant by its own length 

 from the margin : 5th main nerve continued beyond it ; 4th ap- 

 proaching the 3d, at the tip of the wing, by a gentle curve. 



A. Thoracis linece scutellumque hispidulce. 



Sp. 1. Spb. subsultans. Abdominis segmento 2'^°, prcBgrandi ; 

 pedibus posticis elongatis incrassatis, mas, Jemoribus cla- 

 vatis. 



Musca subsultans . . . Fabr. Sp. Ins. II. 444. No. 1. 

 Rhagio subsultans . . Schra. F. B. III. 2402. 

 Calobata subsultans . . Fabr.Syst. Antl. 264. No. 17. 



