396 LIST OF DIPTERA. 



Asilus Geminus, n. s., mas. et fern. Niger, pilis Jlavis vestitus, ab- 

 dominis fem. apice compresso tenui, antennis ferrugineis apice 

 nigris, pedibus rufis, alis subfulvis, apicibus cinereo univittatis. 



Body black: bead a little narrower tban tbe cbest, clotbed 

 tbinly on tbe crown, more thickly behind, and most thickly beneatb, 

 with yellow hairs, beset behind the eyes with a row of black bris- 

 tles ; front and clypeus ferruginous, clothed with long yellow hairs : 

 eyes black ; fore part slightly convex, its facets larger than those of 

 the other part : lip black, clothed at the tip with ferruginous hairs ; 

 palpi ferruginous, clothed with black hairs : feelers black ; first and 

 second joints ferruginous, clothed with short black hairs ; second 

 joint about half the length of the first; third joint spindle-shaped, 

 nearly as long as the first ; bristle full twice the length of the third 

 joint : chest and breast clothed with yellow hairs ; chest beset on 

 each side and behind with black bristles : abdomen of the female a 

 little narrower than the chest, and more tban twice its length, 

 slightly tapering from the base to rather less than two-thirds of the 

 length ; the three segments thence to the tip compressed, and form- 

 ing a slender tail ; segments from the middle to the hind borders 

 clothed with short pale tawny hairs ; first and second segments very 

 short ; third and following segments long, but successively decreas- 

 ing in length ; seventh segment longer than the sixth : abdomen of 

 the male about twice the length of the chest, tapering from the base 

 to the tip, which is adorned with a thick tuft of white silky hairs ; 

 segments from the third successively decreasing in length : legs red, 

 clothed with short pale yellow hairs, and armed with black spines ; 

 claws black, red at the base ; foot-cushions tawny ; thighs striped 

 with black : wings slightly tawny ; a gray streak near the tip of the 

 fore border; wing-ribs and veins piceous; poisers tawny. Length 

 of tbe body 10J — 12 lines; of the wings 15 — 18 lines. 



Asilus fasciatus, var. Fabr. Syst. Ent. 793, 7. Ent. Syst, iv. 379, 

 13. Wied. Dipt. Exot.'i. 208, 45. Auss. Zweif. i. 489, 96. 

 Laphria fasciata, Fabr. Syst. And. 158, 11. 



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



Asilus fraternus, Wied. Zool. Mag. iii. 33, 48. Dipt. Exot. i. 206, 

 43. Auss. Zweif. i. 496, 106. 



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



b. ? 



Asilus limbatus. Trupanea limbata? Maeq. Dipt. Exot. i. 2, 



95, 5. 

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



