Dolichopodidae. ^4 1 



but from the base of the second segment densely silvery; the first 

 segment greenish; on the sides of the second and third segments 

 translucent yellow side spots, sometimes also a small, indistinct spot 

 on the sides of the fourth segment; abdomen clothed with short, 

 black hairs, longer at the sides, and it has long hindmarginal bristles, 

 longest on the first segment; eighth segment with short hairs. Venter 

 dark grey, more or less yellow on the first two segments and on the 

 base of the third; it has short, blackish hairs and hindmarginal bristles; 

 at the base there are two tufts of yellow hairs. Hypopygium with 

 the outer lamellæ and ventral lobes small. Legs with the coxæ grey, 

 the front coxæ may be a little yellowish at the apex and behind ; 

 femora either yellow with only the apical part of hind femora brown 

 or blackish, or they are darker, the anterior femora more or less 

 blackish or brown from the base outwards and above, and the hind 

 femora quite or almost quite dark; tibiæ yellow, hind tibiæ more or 

 less broadly blackish at the apex; anterior tarsi brownish black 

 towards the end, hind tarsi blackish; hind metatarsus a little shorter 

 than the second joint. The legs have short, black hairs, hind coxæ 

 with about five to six bristles on the outside, decreasing in length 

 downwards; the femora haired as in leucocephala, but the hairs 

 scarcely so long; front tibiæ with some bristles above, middle tibiæ 

 with two dorsal rows, and two ventral rows of small bristles, hind 

 tibiæ with two dorsal rows, and with bristly hairs on the dorsal and 

 posterior side, besides with some very small ventral bristles. Wings 



Fig. 76. Wing of A. argyria d'. 



a little yellowish or brownish tinged; veins blackish brown, the discai 

 bend somewhat shallow, placed in or about in the middle between 

 the cross-vein and the apex. Squamulæ dirtily whitish with a black 

 margin above, and with a long, black or brownish black, sometimes 

 dark yellowish shining fringe. Balteres yellow. 



Female. Epistoma broad, greyish white. Palpi large, grey. An- 

 tennæ shorter than in the male, shorter than the head, third joint 



16 



