NO. 1938. THE DIPTEROUS FAMILY PHORID^—MALLOCH. 421 



tips of fore coxae, and trochanters paler; fore and mid tibiae with the 

 usual setulae, hind tibiae with a distinct, rather long bristle at basal 

 third; wings grayish, costa to slightly beyond middle, first division 

 equal to other two together, third barely half as long as second, 

 fringe not longer than diameter of costal vein, fourth vein very 

 distinctly bent at base, originating at beyond fork of third and ending 

 nearly straight at wing tip ; seventh vein indistinct and not reaching 

 the wdng margin; hal teres black. 



Length, 2 J mm. 



Locality.— l^OTth. Dakota, July 8, 1904 (E. S. G. Titus). 



Tyjye.—C&t. No. 14824 U.S.N.M. 



I felt inclined to consider this as pachyneura Loew, before I saw 

 examples of that species, but it is quite distinct from it. Especially 

 I may mention the presence of only two scutellar bristles and the fact 

 that the third thick vein does not show any remarkable thickening, 

 though it is thicker than the costa. 



TRUPHEONEURA MICROCEPHALA Loew. 



Male and female. — Shining black; frons shining, slightly pollinose, 

 nearly twice as broad as long, first row of bristles convex, antennae 

 black-browTi, not above normal size in either sex, arista very long, 

 three times as long as frons, distinctly pubescent, palpi in male very 

 large and broad, nearly as long as height of head, and almost without 

 bristles, in female above the normal size but moderately bristled, 

 black in both sexes, proboscis in neither sex protruding; thorax 

 shining, humeri brownish, scutellum with only two bristles in both 

 sexes; abdomen in male rather long and narrow, second segment 

 much longer than first; last three segments and sides of basal seg- 

 ments wdth scattered, rather long hairs, hypopygium large, protrud- 

 ing, gray })ollinose, terminal forceps-like lamellae asymmetrical, 

 numerous conspicuous hairs on terminal lamelke and on ventral 

 process, female abdomen with segments subequal and all segments 

 with scattered, rather long hairs; legs piceous, tibiae paler, the usual 

 bristles on all tibia^; wings grayish to fuscous, costa to very distinctly 

 beyond middle, thickened on apical half beyond apex of first vein, 

 first division barely as long as other two together, second and third 

 subequal in length, fourth vein leaving at midway from fork of third 

 vein to tip with a very distinct bend, and ending nearly straight at 

 close to wing tip, seventh vein very indistinct, rudimentary; hal teres 

 j^ellow. 



Length, 2-4 mm. 



There are some differences between the above description and that 

 of Loew as copied by Brues, but I believe they are more the result of 

 inaccuracy of observation by Loew than that the specimens before 

 me are not the same as his which were from the District of Columbia 



