1945] 
85 
Ten New Species of Empididce 
Type and allotype: Seward, Alaska, 26 July 1921, J. M. 
Aldrich (U.S.N.M.). A paratype, Anchorage, Alaska, 20 July, 
also from my friend, the late Dr. Aldrich. 
Key to the American Species of Gloma 
1. Posterior terminal prong of basal valve of pygidium slender and as long as 
the bunch of preapical hairs (in the European fuscipennis Meig. the pos- 
terior prong is very thin and much longer than the anterior) ; coxae and legs 
black; radial and cubical veins distinctly stronger than the medial. Wash. 
luctuosa Mel. 
Posterior prong stout and short, about' half as long as the hairs of the pre- 
apical group; radial and cubital veins scarcely stronger than the medial. . . 2. 
2. Eight or more scutellar bristles, ten or more dorsocentrals ; coxae and legs 
dark fuscous, both sides of hind femora of male fringed with long hairs, 
under side of middle femora with about five hairs along the apical half; 
female black; length 4 mm. Alaska. pectinipes, n.sp. 
Four scutellars, eight or fewer dorsocentrals; coxae and legs light fuscous, of 
female paler, hairs of under side of femora not longer than diameter of the 
femur; female body more or less testaceous; length 3 mm. Ida., Wash., Oreg. 
fuscipes, n.sp. 
Oreogeton xanthus, n.sp. 
Length 7 mm. Male entirely luteous, subshining, female with 
head and antennae sometimes blackish, with thin dust; bristles 
and hairs black. Third antennal joint about as long as deep, 
shorter than the basal two together, arista apical; proboscis 
small, fleshy, palpi with numerous bristles. Valves of pygidium 
deeply emarginate at middle above, the apical corner bluntly 
digitate, posteriorly with numerous hairs. Middle coxae with 
blunt setae, those of hind coxae short; male with eight to ten 
flexar setae on middle femora rather uniformly distributed, the 
middle tibiae pectinate within with fine setae, and only slightly 
bent at middle; tarsi simple, last two joints fuscous. Wings with 
yellowish tinge, stigma slightly darker, veins yellow, the first, 
second and third setulose above and the second and fourth 
underneath, sections of fifth vein subequal. 
Type and allotype: Mount Baker, Washington, Skyline Trail, 
10 August 1925. Six male and five female paratypes: topotypic, 
and also from Mount Rainier, at White River, 20 July 1924, 
and Everett, Washington, 4 July 1924. 
In the table of species in Fascicle 185 of the Genera Insec- 
torum, page 99, xanthus leads to capnopterus , but is readily 
distinct in its yellow color and in having many setae under the 
middle femora of the male. Xanthus is the only species having 
