AUT. 9 TWO-WINGED FLIES OF TRIBE MILTOGRAMMINI ALLEN 77 



thickly beset with slender erect hairs which are most dense at or 

 below level of lowest ocellus, where they invade the vitta and form 

 there a distinct fringe on both sides between the frontal rows; vibrissae 

 level with front edge of oral margin; facial ridges with small bristly 

 hairs on lowest fifth; antennae extending five-sixths the distance to 

 vibrissae, first two joints red, third joint black, four times length of 

 second; arista thickened on basal three-fourths, penultimate joint 

 slightly longer than broad; parafacials liairy to near tip of antennae, 

 distinctly narrowest at lower corner of eye; in profile, bucca equals 

 one-sixth eye height; palpi yellow. Thorax black, subshining, 

 sparsely gray pollinose; obscurely five-vittate, inner three vittae 

 nmch narrower, none extending beyond transverse suture; notum 

 densely pilose with fine erect black hairs; scutellum densely gray 

 pollnose at tip, black subshining at base, the intermediate pair of 

 marginal bristles distinctly larger than the other two equal pairs, 

 small preapicals differentiated. Abdomen gray pollinose over black; 

 ])ollinose area of first segment restricted to several small spots, 

 intermediate segments pollinose to apices or nearly so, with three 

 large polished black triangular spots, sometimes merging apically 

 in the third, fourth without spots, pollinose on the basal half; fii-st 

 two segments each with a pair of strong median marginal bristles, 

 third and fourth each with marginal rows of about twelve. Wings 

 liyaline; section of fourth vein beyond bend, arcuate, but lacking 

 an angular bend; distance from bend to hind cross-vein one-third 

 to one-fifth the preceding section; last section of fifth vein almost 

 half length of preceding section. Legs black; second joint of fore 

 tarsus (pi. 3, fig. 15) bearing on the ventral side a conspicuous tuft 

 of long bristly hairs in form of a liorizontally flattened brush having 

 its tip upcurved; last three tarsal joints much reduced in size and 

 arched above the biushlike tuft; third segment distinctly thicker 

 than the two apical joints which are small and elongate; hind tibia 

 witli about twelve unequal bristles in the outside I'ow, of which one 

 bristle near middle is much the largest. 



Female. — Front at narrowest 0.4.5 of the head width in one specimen 

 measured; vertex and front golden pollinose; third antennal joint 

 two and one-half times length of second. Fore tarsus with the four 

 apical joints flattened but not reduced in size or bearing a long tuft 

 of hair. Otherwise, save for the usual difference in genitalia, like 

 the male. 



Length, 7.0 to 8.5 mm. 



Type and allotype.— Male . Cat. No. 28159 U.wS.N.M. The male 

 type collected. Hood River, Washington, July 5, 1917 (F. R. Cole); 

 the allotype female from Mount Constitution, Washington. 



Range. — Wasliington, Oregon, California, British Columbia. 



Host relationships. — Unknown. 



