280 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



margins of abdominal segments white ; legs dark brown ; knees brown- 

 ish-yellow; wings strongly tinged with brown. Length 8 mm . 



The brownish-black thorax and scatellum are clothed with a dense, 

 short, yellowish pubescence; abdomen dark brown, segments 2 and 

 3 with narrower, 4 and^5 with broader, white posterior margins ; venter, 

 except the base, white ; each segment with a black cross-band on the 

 anterior margin. Tegulae brownish, with narrow dark brown edges. 

 Halteres with a browli knob. Wings comparatively long, strongly and 

 rather uniformly tinged with brown. This color is darker in the cos- 

 tal cells, especially in the interval between the auxiliary and the first 

 veins; costa distinctly incrassate in the region of the stigma: veins 

 brown. 



Hob. — White Mountains, New Hampshire. Two specimens. 



Easily distinguished from the other described species of the genus by 

 its strongly infuscated wings and its large size. The abdomens of my 

 specimens being somewhat shrunken, the measurement I give is only an 

 approximation. 



Family MIDAID^. 



We have two Californian Leptomidas, the eight other species of the 

 genus belonging to the Mediterranean fauna (Portugal, Algiers, Egypt) 

 or South Africa. 



The new genas Ehaphioinidas from California is closely related to 

 Mitrodetus from Chili. 



The anomalous genus Apiocera, intermediate between the Midaidce 

 and Asilidce, has been found in Australia, Vandiemen's Land, and Chili. 

 I describe a species from Yosemite Valley, California. 



Leptomidas pantherinus Gerstaecker, Stett. Ent. Zeit., 1868, 85. 



(Translation.) — "Wings slightly infuscated, with testaceous veins ; 

 body, antennae, and legs luteous ; head and basal cross-bands on the 

 abdominal segments black. Length 8f lines" [about 19 mm ]. 



" Antennae considerably longer than the thorax ; the stout basal joint 

 only twice as long as the second, both beset with black bristles ; the 

 third joint is twice as long as the two first taken together, with an in- 

 crassate, distinctly separated tip ; the terminal club is equal to the 

 whole antenna in length, and is divided by a coarctation on the first 

 third of its length in a narrow basal and an elongate-oval apical por- 

 tion. The color of the antennae is reddish-yellow ; the tip of the third 

 joint and the base of the terminal club are infuscated. Head black, 

 only the small tumid clypeus and the lower oral edge reddish-yellow ; 

 pubescence altogether golden-yellow, somewhat longer on the clypeus. 

 The broad labella of the short proboscis reddish- brown. Thorax yolk- 

 yellow, with indistinct darker stripes and short yellowish pile on the 

 dorsum; pleurae shining light brown, variegated with black. Legs 

 uniformly yellow, with light brown coxae; ungues black at tip ; hind 

 femora not incrassate, before the tip on the inner side with a chestnut- 



