322 ERNEST A. BACK 



Type. — M. C. Z. The type series consists of two male and 

 two female specimens in good condition. 



Habitat. — Texas (type, Belgrage). 



The two females mentioned by Dr. W. S. Williston in the 

 second reference I believe to be either ludius or senilis. 



Heteropogon ludius. 



Anisopogon ludius Coquillett, Can. Ent., XXV, 20, 1893. 



$ $. — Length 12-16 mm. — Wholly black; the tibiae and tarsi vary- 

 ing from pale yellow to dark reddish-brown, white pilose, the front 

 tarsi of the male clothed above with dense appressed white hairs and 

 the middle tibiae before with a brush of black and white hairs and 

 bristles. 



"rj 1 . — Black; the tibiae and tarsi dark reddish-brown. Face gently 

 convex, white pilose, bristles of lower part black; the first segment of 

 antennae slightly longer than the second, the third tapering to the tip 

 three times as long as the second, the style slender, seven-eighths as 

 long as the third antennal segment; pile of occiput, thorax, pleurae, 

 coxae and venter white; upper side of each front tarsal segment with 

 a dense covering of appressed white hairs. Upper side of middle 

 femora toward its apex with a dense covering of short appressed hairs, 

 which, however, leave a large ellipitical naked space between the apex 

 and the middle; middle tibia? white pilose in front, and above the mid- 

 dle ornamented with a large patch of appressed black hairs and 

 bristles, which form an inner and an outer fringe; inner side of posterior 

 tibiae near the tip, and also of the hind metatarsi, densely bright 

 yellow pubescent; wings smoky-brown, lightest at the apex and along 

 the hind margin; all the posterior and the anal cell open. 



" 9- — Like the male, except that the front tarsi, middle femora and 

 tibiae are not ornamented as in the male, and the wings are much 

 lighter, the brown forming a border to some of the veins." 



Type. — U. S. N. M., Cat. No. 927. Type series consists of 

 two male and three female specimens. 



Habitat. — Los Angeles and San Bernardino Counties, Cal- 

 ifornia, and British Columbia. 



Notwithstanding Mr. Coquillett 's note that "the species is 

 closely related to senilis Bigot, but in the latter species the 

 wings are wholly hyaline and the appressed white hair on the 

 front tarsi of the male is confined to the first segment," I am 

 of the opinion that more collecting will prove them identical. 

 My reason for thinking so are that Bigot does not state defin- 

 itely whether the metatarsi or all the tarsal segments of the 



