AKT. 9 TWO-WIXGED FLIES OF TRIBE MILTOGEAMMINI ALLEN 93 



with brown on the notum, with three to five obscure black vittae; 

 scutelium with two pairs of strong marginal bristles, apicals lacking, 

 one pair of weak preapicals. Abdomen black, the last three segments 

 each with a sharply defined, white pollinose band on the basal two- 

 thirds, prolonged ventrally to the sternum; first two adbominal 

 segments each with two or more weak laterals and a strong median 

 pair of marginal bristles, third and fourth with uninterrupted marginal 

 rows. Genitalia in repose, prominent, extruding from fourth 

 abdominal segment for distance equal to their length; genital segments 

 shining black, first smaller than the second ; fifth sternite conspicuous, 

 armed posteriorly with a tuft of stubby sj^ines, laterally with slender 

 bristles. Wings hyaline; fourth vein beyond the bend slightly 

 arcuate and parallel with the hind cross vein; section from bend to 

 hind cross vein about one-half as long as preceding section; last 

 section of fifth vein about one-fourth as long as preceding section; one 

 small costal spine; third vein with row of small bristles extending 

 approximately half way to small cross vein. Legs black; pul villi of 

 fore feet one and one-fourth times as long as last tarsal joint; middle 

 tibia with one bristle on outer front side beyond the middle ; hind tibia 

 on outside with row of four unequal bristles terminating in the 

 strongest, slightly beyond the middle. 



Female. — Not known. 



Length, 6.5 mm. 



Type.— Mole, Cat. No. 2811, U.S.N.M. 



Host relationships.— Vnknown. 



Described from a single male, Florissant, Colorado, June 28, 1908, 

 (S. A. Rohwer) in the National Museum labeled "rohweri." 



EUMACRONYCHIA ELONGATA, new species 



Male.—Front 0.365 of the head width (in two specimens measured 

 0.36 and 0.37 respectively) ; front including the vitta, face, and bucca, 

 densely white pollinose, merging with gray pollen at vertex; vitta with 

 parallel sides to middle thence moderately divergent to vertex, at 

 level of lowest orbitals twice width of parafrontal; frontal row of about 

 six weak bristles extending to base of antennae ; one reclinate and two 

 proclinate orbital bristles; parafrontals almost destitute ot bristly 

 hairs; vibrissae inserted one-half second antennal joint above front 

 edge of oral margin; one or two small bristles above vibrissae on 

 facial ridges; first two antennal joints brown, third black and two and 

 one-half times length of second; arista thickened on basal two-fifths; 

 parafacials moderately black setulose; m profile, bucca wider than 

 parafacials at their narrowest and nearly one-half eye height, front 

 projects more than half the horizontal diameter ot eye; proboscis 

 slightly shorter than head height; palpi black, distinctly flattened and 

 enlarged at the tip, subfoliaceous. Thorax gray pollinose with two 



