WiLLlSTON: NEW DIPTERA. 69 



Auss. Zw. Ins., i, 429, 8; Willistoii, Trans. Amer. Ent. Soc. xi., pi. ii, fig. 10. 

 Asilus herminiufi Walker, List, etc., ii, 410 (type compared by Osten Sackcn). 



Male, female. Face nearly straight in profile, in the male very 

 gently concave below the antennae and thence more gently convex to 

 the oral margin; nearly bare, but in the middle on the lower half 

 and along the oral margin with not abundant light yellow hair; thickly 

 covered with light golden yellow dust. First two joints of the 

 antennae yellow with sparse yellow and black hair, second joint at 

 the tip blackish, third joint black, narrowly yellow at the base; first 

 joint nearly a half longer than the second, third joint slender, a half 

 longer than the first two joints together, bristle short, styliform, not 

 longer than the second joint of the antenna. Front narrowed above, 

 thickly ochraceous pollinose. Occipito-orbital bristles and the beard 

 short, not abundant, light yellow; occiput light golden yellow, the 

 orbits narrowly whitish. Dorsum of thorax and the coxae, especially 

 the front ones in front, golden pollinose; pleurae and posterior coxae 

 reddish brown; dorsum when seen from above with a broad opaque 

 blackish stripe, when seen from behind with two slender black stripes 

 and the intermediate portion brown; bristles short, sparse, black 

 (usually); scutellum with only two on its border. Abdomen slender, 

 reddish brown, light golden pollinose, but variable in different reflec- 

 tions; when seen from behind there is only a posterior cross-band, 

 narrowed in the middle; on the sides of the second segment with a 

 few bristles and hairs, elsewhere the hair is very short, very sparse and 

 all light yellow; hypopygium and ovipositor small. Wings yellow 

 with the veins of the same color, the interior of the cells on the outer 

 and posterior part of the wings blackish, narrowly separated from the 

 veins by a light yellow border. Legs light yellow, with ext.-c.njly 

 short black hair on the femora and front tibiae in front, giving them a 

 dark tinge; front side of the front and middle femora with a black or 

 blackish spot; the short hair of the tibiae and tarsi yellow, the bristles 

 mostly black. 



Length, 22-25 ^i^™- 



Numerous specimens. New England States, Pennsylvania, Indiana, 

 Kansas. 



Asilus midas. 



Asilus midas Brauer, Sitzb. d. k. Acad. d. Wissensch. p. 3S7, pi. 

 ii, 1885. — Mexico. 



"Ganz schwarz, nur die Fliigel sind feurig rothgelb, an der Basis 

 dunkler und an der Spitze rauchgrau gesaumt. " 



A single specimen of this striking species is in the Kansas Univer- 

 sity collection, captured by Prof. Snow in New Mexico. 



