LIST OF DIPTERA. 999 



colourless ; each with a small brown spot at the tip of the first lon- 

 gitudinal vein, and at some distance above the tip of the wing ; 

 wing-ribs tawny; reins black ; fourth longitudinal vein very slightly 

 curved upward after its junction with the lower cross-vein, which is 

 straight; the space between the lower cross-vein and the middle 

 cross-vein is less than that between the lower cross-vein and the tip 

 of the fourth longitudinal vein ; poisers yellow. Length of the 

 body 1 J line ; of the wings 2 lines. 



a. Florida. Presented by E. Doubleday, Esq. 



Sepsis referens, n. s., mas. et fern. Nigra, capite antico ferrugineo, 

 abdomine purpureo, antennis nigris, pedibus fulvis, tibiis posti- 

 cis subarcuatis, alls limpidis macula apicali fusca. 

 Head and chest black, beset with very few black bristles : head 

 ferruginous in front and beneath : eyes red, convex ; all the facets 

 very small : feelers black, shorter than the face ; third joint conical, 

 more thau twice the length of the second ; bristle bare, very slender, 

 more than twice the length of the third joint : abdomen purple, pe- 

 tiolated, a little longer than the chest : legs tawny, clothed with 

 very short black hairs, beset with very few black bristles ; tips of 

 the feet pitchy ; claws black ; fore thighs armed with black spines ; 

 hinder shanks very slightly curved : wings colourless, with a small 

 brown spot a little above the tip ; wing-ribs tawny ; veins black, 

 tawny at the base; poisers black, with tawny knobs; fourth longitu- 

 dinal vein very slightly curved upward along the whole length after 

 its junction with the lower cross-vein, which is straight, and very 

 much nearer to the tip of the fourth longitudinal vein than to the 

 middle cross-vein. Length of the body 1^- line ; of the wings 2~ 

 lines. 

 a. North America. Presented by the Entomological Club. 



Sepsis nodosa, n. s., fern. JEneo-viridis, capite pectoreque piceis, 

 thoracis lateribus ferrugineo vittatis, pedibus fulvis, femoribus 

 posticis piceis, alis sublimpidis macula apicali fusca. 

 Head pitchy : eyes black, convex ; all the facets very small : 

 head and chest beset with a few black bristles : chest dark green ; 

 a broad ferruginous stripe on each side : breast pitchy : abdomen 

 brassy green, pointed at the tip, much longer than the chest ; first 

 segment forming a long obclavate petiole, mostly pitchy ; second 

 segment long, very convex beneath ; third shorter ; fourth and fol- 

 lowing very short: legs pale tawny, slender, clothed with very short 

 tawny hairs ; hind thighs pitchy, tawny at the base : hind shanks 

 pitchy at the base ; claws black : wings nearly colourless ; a brown 



