490 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 43. 



there are no males of either species in the collection, as that sex will 

 in all probability show more reliable and distinct differences than 

 the female. 



Locality. — London Hill Mine, Bear Lake, Kaslo, British Columbia; 

 altitude, 7,000 feet; July 21, 1903 (R. P. Currie). 



Type.— C&t. No. 14887, U.S.N.M. 



APraOCHiETA INFUMATA, new species. 

 Plate 37, fig. 2. 



Male. — Black, hardly shining; frons dull, about one-third broader 

 than long, only one pair of post-antennal bristles present, center pair 

 of bristles in first row lower on frons than post-antennal pair and 

 much nearer the center of frons than the outer paii* in fiirst row, which 

 are higher placed than the post-antennals, frontal suture distinct, 

 but narrow; antennae large, velvety black-brown, arista black, rather 

 thick and short, indistinctly pubescent; palpi yellow, rather narrow 

 and shortly but strongly bristled; thorax black, humeri and pro thorax 

 yellow and polished, mesopleura bare; two strong scutellar bristles; 

 abdomen dull black, segments subequal, sixth with a few preapical 

 long bristles, anal protuberance large and yellow, with a few scat- 

 tered hairs and two somewhat long, curled terminal hairs; legs and 

 00X88 yellow, hind femora at apices, and liind tibiae darker, hind 

 tibial setulse (8-9) on basal two-thirds large and distinct, hair-like on 

 apical third; wdngs fuscous, especially on fore margin, costa to well 

 beyond middle, first division nearly as long as second, third about 

 one-fourth as long as second, fringe moderately long, as long as fork 

 of third vein, fourth vein leaving at beyond fork of third with a dis- 

 tinct bend and running nearly straight to a little in front of wing 

 tip, fifth ending farther from wing tip than the fourth; halteres 

 yellow. 



Length, 3^ mm. 



Type.—C&t. No. 14888, U.S.N.M. 



One male, San Mateo County, California (C. F. Baker). 



A very conspicuous species, easily distinguished by the very dark 

 wings and long costa. If the female conforms to the general rule in 

 this genus, the first costal division should be distinctly shorter than 

 the second. 



APHIOCH.ffi;TA CH.ffiTONEURA, new species. 



Male and female. — Brown, distinctly shining; frons long, one half 

 longer than broad, black-brown, pohshed, lower post-antennal 

 bristles but little smaller than the upper pair, which are widely 

 placed, center pair of bristles in fij-st row very close to eye margin 

 and much lower on frons than outer pair in first row, so that they are 

 nearly directly below them ; frontal suture fine but distinct; antennas 

 brown, arista shghtly longer than frons, distinctly pubescent; palpi 



