ZooL.— Vol. II.] WHEELER— DOLICHOPODID^. 57 



Teuchophorus Loew. 



This genus, which is allied to C amfsicnemus and Chry- 

 sotus, has not been found hitherto in this country. The 

 single species here described conforms to Loew's definition 

 of the genus, the main peculiarities of which are in the male 

 the thickening of the costa, the obliquity of the posterior 

 cross-vein, the rudimental nature of the sixth vein and the 

 peculiar modification and spinulation of the legs, especially 

 of the hind pair. Our species seems to be rather closely 

 related to the three European species: T. spinigerellus 

 Z,it\X.,T. calcaratus Macq., and T. monacanthus Loew; 

 the principal difference being in the ornamentation of the 

 hind femora of the male. 



56. Teuchophorus clavigerellus, sp. nov. 



Plate IV, Figs. 103 and 104. 



Male. Length 1.3 mm.; length of wing 1.5 mm. Proboscis and palpi 

 black, the latter with yellow hairs. Face very narrow, especially below, cov- 

 ered with white dust. Antennae short, third joint very short, much broader 

 than long, apparently set into the second joint, arista dorsal, covered with 

 short pubescence. Front, thorax, scutellum and abdomen rather dark metal- 

 lic green with golden reflections. Acrostichal bristles in two irregular rows, 

 dorsal and humeral bristles very well developed. Scutellum with two macro- 

 chcetae and several small bristles along its posterior edge. Abdomen later- 

 ally compressed, its bristles mostly black, but some along the sides of the seg- 

 ments yellow. Hypopygium small, black, with two pairs of small pointed, 

 yellow appendages directed backwards. Pleurae green, dusted with white. 

 Coxae and legs light yellow. Fore tibia without conspicuous bristles, fore 

 tarsi blackened from the tip of the first joint, which is rather slender, as long 

 as the four remaining joints taken together, and furnished with four long 

 bristles on its outer side. Middle femur with a few long bristles near its base 

 on the lower side; middle tibia with four long bristles on its upper and two 

 long bristles on its lower surface; middle tarsi plain, blackened from the tip 

 of the first joint; joints gradually decreasing in length to the tip. Hind femur 

 with several long bristles on the anterior surface near the tip; hind tibia per- 

 ceptibly thickened, blackened on the upper side near the base and bearing 

 near this point a peculiar black appendage, somewhat dilated at the tip. This 

 appendage which, to judge from its striated surface, seems to be made up of 

 several agglutinated hairs, is directed forwards and inwards when the leg is 

 in a walking position. Distal to the appendage the hind tibia is provided 

 with several conspicuously large black bristles on the anterior surface and 

 several much smaller ones on the posterior surface. Hind tarsi tapering 

 gradually, blackened from the tip of the first joint, which is scarcely shorter 



