LIST OF DIPTERA. 645 



Psilopus gemmarius, n. s., mas. Cyaneo-viridis, capite purpureo, tho- 

 racis lateribuspectoreque albo-flavis, abdomine viridi nigrofasciato, 

 basifulvo, antennis nigris basiflavis, capite thoraceque longiori- 

 bus, pedibus albo-fulvis, tarsis apice nigris, alis subfulvis. 



Head covered with white down, shining and bright bluish pur- 

 ple on the crown : eyes pitchy ; facets on the fore part of the crown 

 larger than those elsewhere : mouth pale yellow : feelers black, pale 

 yellow at the base, longer than the head and the chest : disk of the 

 chest bluish green, armed with a few black bristles ; sides and 

 breast pale yellow, with a whitish tinge : abdomen green, clothed 

 with black hairs, more slender than the chest, and about four times 

 its length, tawny at the base, black at the tip ; a broad black band 

 along the fore border of each segment : legs whitish, tawny, long 

 and slender, clothed with black hairs and bristles ; feet black to- 

 wards the tips : wings slightly tawny, brown at the tips of the 

 fore borders ; wing-ribs tawny; veins black ; poisers pale tawny. 

 Length of the body 5 lines ; of the wings 7f lines. 



a. Sierra Leone. Presented by the Rev. D. F. Morgan. 



Psilopus delicatus, n. s., fern. Viridis, gracilis, abdomine aureo- 

 viridi, antennis fulvis, articulo 3° nigro, pedibus Jlavis, alis lim- 

 pidis. 



Body slender, bright green, clothed with black hairs and bris- 

 tles : crown of the head blue : eyes bright red : mouth yellow : 

 feelers tawny ; third joint black ; bristle black, shorter than the 

 chest : abdomen golden green : legs pale yellow, long and slender, 

 clothed with short black hairs ; feet pitchy towards the tips : wings 

 colourless ; wing-ribs and poisers tawny ; veins pitchy. Length of 

 the body 2\ lines ; of the wings 5 lines. 



a. New York. Presented by the Entomological Club. 



b, New York. Presented by E. Doubleday, Esq. 



Psilopus corculum, n. s., mas. Viridis, capitis vertice cyaneo-pur- 

 pureo, sculello cyaneo, abdominis basi purpureo-cyaneo apice cu- 

 preo-viridi, antennis nigris, femoribus viridibus, tibiis fulvis, 

 tarsis piceis, alis limpidis, fusco bifasciatis. 



Body bright green, beset with black hairs and bristles : head 

 bright bluish purple on the crown, clothed with white down in front, 

 and with white hairs beneath : eyes red : mouth tawny : feelers 

 black ; bristle nearly as long as the chest : scutcheon blue; sides of 

 the chest and breast covered with white bloom : abdomen bright 

 purplish blue for half the length from the base, bright coppery 

 green from thence to the tip : legs clothed with black hairs and 



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