204 KANSAS UNIVERSITY SCIENCE BULLETIN. 



pleural bristles present, two of the latter are situated low down ; 

 scutellum with a pair of strong, decussating apicals, a pair of 

 weak subapicals, and a pair of strong basal bristles. Second, 

 third and fourth abdominal segments with marginals, and third 

 and fourth with discal bristles. Wings hyaline, veins light 

 brown, costal spine present. Halteres yellow. Length, 5 mm. 

 One male and nine females ; May, June, and October. 



Spilogaster latifrons, n. sp. 



Male : Gray ; thorax with two brown lines anteriorly ; ab- 

 domen with first segment largely, and posterior border of re- 

 maining segments, yellow; second and third segments brown, 

 biraaculate. Head silvery pollinose ; front with curved sides, 

 slightly broader, at a point half-way between antenna^ and ocelli, 

 than ocellar tubercle, with three decussating frontal bristles 

 above the antennae, lowest pair strongest and porrect, others di- 

 rected slightly backward, ocellar bristles large, pointing for- 

 ward ; antennte black, nearly as long as the face, arista long, 

 sparsely plumose ; vibrissse large ; sides of face and upper part 

 of cheeks bare ; palpi black, proboscis short, yellowish at tip. 

 Thorax with four rows of dorsocentrals, each containing two 

 presutural bristles, the two middle rows three, and the two 

 outer rows two postsutural bristles ; two humerals, two noto- 

 pleurals, two supraalars, the hind one very small, and one post- 

 alar bristle present ; the pair of prescutellar bristles are very 

 small and close together ; of the mesopleural bristles two in 

 upper part of row and one in lower part are strong, others weak ; 

 three sternopleurals, the middle one situated low down ; scutel- 

 lum with an apical pair of strong, decussating bristles, a pair 

 of weak subapicals, and a pair of strong basals. Abdominal 

 segments with a row of marginals, those of the third and fourth 

 segments strongest, the third and fourth also with a row of 

 discals ; hypopygium small, largely concealed. Legs black, 

 C0X8D, tips of femora, and tibife yellow, femora gray dusted. 

 Wings hyaline, veins yellowish, a distinct costal spine present. 

 Halteres yellow. Length, 4.5 mm. 



Female : Same as male, except there are five frontal bristles, 

 the lowest pair being largest and more porrect, a large inner 

 and smaller outer vertical bristle present ; the gray frontal tri- 

 angle reaching nearly to the antennae ; the coxtc and the front 



