AKT. 9 TWO-WINGED FLIES OF TRIBE MILTOGRAMMINI ALLEN 87 



length of second antennal joint above front edge of oral margin, 

 and approximated to distance nearly twice its length; facial ridges 

 with but two or three small hairs above the vibrissae; antennae 

 yellow, third joint four times length of second; arista thickened on 

 basal three-fifths; in profile, bucca wider than parafacials and equals 

 one-half eye height; front projects nearly one-half eye height; head 

 length at vibrissae slightly less than at base of antennae; parafacials 

 with microscopic white pile; palpi yellow. Thorax densely gray 

 pollinose, with one to three narrow median and two broader lateral 

 vittae; apical scutellar bristles much smaller than the other two 

 marginal pairs; small preapicals present. Abdomen black excepting 

 the fourth segment which is broadly yellow; last three segments 

 with dense white pollinose bands on basal half; second segment with 

 a median marginal pair of bristles; third and fourth segments with 

 marginal rows of from six to ten; venter densely villous, fourth seg- 

 ment not conspicuous. Genital segments yellow, first segment bare, 

 second with very short bristly hairs; inner forceps curved slightly 

 forward, tapering gradually to sharp, black tips; when viewed from 

 the rear, the prongs are separated and strongly bowed at the middle 

 Wing hyaline, bearing a small costal spine; third vein bristly about 

 half way to small cross- vein; hind cross-vein parallel to section of 

 fourth vein beyond the bend. Legs black, with conspicuous claws 

 and pulvilli which are longer than the last two tarsal joints on all 

 the feet; middle tibia with one bristle on outer front side near the 

 middle, on apical half of flexor side with distinct, villous, suberect 

 hair, in best view, as long as width of tibia; hind femur moderately 

 villous; hind tibia ^vith three uneven bristles on outer surface before 

 the middle; on flexor surface with rather long appressed hair. 



Female. — Several specimens which most closely resemble the male 

 have the following characters. Front at narrowest point 0.40 of the 

 head width (measurements of four as follows: 0.40, 0.40, 0.40, 0.41) ; 

 third antennal joint three to four times as long as the second; in 

 profile, bucca scarcely one-third eye height. Second abdominal 

 segment lacking macrochaetae, third segment with very weak margi- 

 nals outside the median pair. First genital segment large, fully 

 exposed, simulating a fifth abdominal segment, A\ath a sharply 

 pointed, inverted V-shapcd arch above, drawn together at the sides. 

 Femora and tibiae without villosity. Otherwise save for the usual 

 difl'ercnces of genitalia, like the male. 



Length, 5.5 to 8.5 mm. 



Host relationships. — LTnknown. 



This species was originally described from four males and nine 

 females, all apparently cotypes. The type series which was deposited 

 in the University of Kansas Museum has dwindled to three, of which 

 one fortunately is a male. This material was loaned to the National 



