74 WILI.ISrON: XK.W diptera. 



not for the very striking difference in the coloration of the legs. The 

 front legs are wholly pure light yellow with the same colored hair and 

 bristles, except a small black spot on the base of the femora above; 

 the middle legs are of the same color, but the black stripe on the 

 upper part of the femora extends two-thirds of the way to the tip, at 

 the extreme tip there is also a very narrow blackish ring; some of the 

 bristles are black and the short bristly hairs on the under side of the 

 tarsi are black; the hind legs have the femora wholly black, the ti]) of 

 the tibiae and the last joint of the tarsi also black; except the long 

 pile on the inner and under side of the femora and the short pile on 

 the inner side of the tibiae and metatarsi, the vestiture is wholly black. 

 The convexity of the face also reaches a little further up and is 

 covered wholly with yellow and abundant hair. 



Length, 15 mm. 



A female from ("alifornia, may belong here. The yellow hair of 

 the gibbosity has some black intermixed with it at the tojj and the 

 femora are wholly black. The hair on the thf)r.i\' i^^ longer and more 

 abundant in tlie middle in front. 



Asilus (Tolmerusi notatus. 



Ani/iiK )ii>tiitii« \Vic(lcm;iiiii. .\iiss. Zwcill. In.srktcn, i. -1.")!. 



Male, female. Face light grayish yellowish ]jollinosc, the gibbosity 

 clothed on the upjier part with black bristles, on the lower part with 

 thin, light yellow bristles; in profde the gibbosity is strong, and occu- 

 pies a little more than half of the length of the face. Antennae black, 

 the first two joints with black hair, the third about equal to the first 

 two together, the bristle about as long as the joint. Front narrowed 

 above, clothed with black hair. Occipito-orbital bristles black; 

 beard silky white. Dorsum of thorax light yellowish gray poUinose, 

 opaque; the median stripes, separated by a distinct interval, and the 

 usual lateral spots, dark brown; in front with short black hair, behind 

 with strong black bristles; scutellum usually with four bristles, two 

 of them, especially the inner ones, sometimes small or obsolete; 

 pleurae gray pollinose, tlie sparse vestiture wholly light-colored. 

 Abdomen black, brown pollinose; when seen from behind more shin- 

 ing, except broadly on the sides, especially behind, and on the 

 posterior margin of each segment, where it is light gray, or yellowish 

 gray, pollinose, near the hind margin of each segment on the sides 

 with two or three bristles. Fegs black, with close, light colored hair 

 and black bristles; base of all the tibiae, and the metatarsi except 

 their tip, yellowish red; the front tibiae with several conspicuous 

 bristles on the outer side, the inner side of the front tibiae and meta- 

 tarsi with short, dense, orange red pile; hind femora noticeably less 



