CEEATOMYIELLA AND PARADIDYMA REIN HARD 27 



basal third of intermediate segments; first segment bearing a very 

 slender or hairlike pair of median marginals; second with a well- 

 developed pair; third bearing a marginal row of about six with a 

 wide space between tlie median pair and the lateral one ; fourth with 

 a row of strong discals besides the usual marginal row ; genital seg- 

 ments shining blade, retracted ; fifth sternite black, the lobes promi- 

 nent, narrowly and deeply incised. 



Legs slender, black; claws and pulvilli nearly as long as the apical 

 tarsal segment. 



Wings subhyaline; hind cross vein very oblique to fourth, which 

 it joins almost midway between bend and small cross vein; apical cell 

 narrowly open well before the tip of wing ; third vein setulose three- 

 fourths the distance to small cross vein; costal spine small; epaulets 

 black. 



Length- — 6 mm. 



Female. — (Unknown. 



Ty^^.— Male, U.S.N.M. no. 44764. 



Remarks. — Described from one male specimen taken at Smithfield, 

 Utah, August 24, 1925, by G. F. Knowlton. 



The narrower front, retracted hind cross vein, two sternopleural 

 bristles, and the more defined and nan-ower pollen bands on last 

 three abdominal segments distinguish the species from afflnis., 

 described herein. The two species agree in most other essential 

 characters. 



(12) PARADroYMA CRASSISETA, new species 



Male. — Front at vertex 0.23 and 0.21 of the head width in two 

 specimens, very prominent at antennae; face strongly receding, its 

 ridges rather flattened below, bearing bristly hairs and one or two 

 strong macrochaetae next to vibrissae; parafrontals black, covered 

 with reflecting grayish pollen, narrow on upper part behind middle ; 

 median stripe red, wider than one parafrontal except at antennae; 

 frontals six to eight in number, directed inward, the uppermost 

 nearly erect, not longer than preceding pair; orbitals absent; inner 

 verticals strong, outer ones not developed; ©cellars ordinary in size, 

 proclinate ; antennae black, about as long as face ; first segment ex- 

 tending considerably above the front and as long as the second ; third 

 segment unusually broad to tip and about equal the width of para- 

 facial at narrowest part, six to seven times as long as the second 

 segment; arista black, thickened on proximal two-thirds, second 

 segment short ; paraf acials black, the pollen dark gray with a distinct 

 luster, clothed with black hairs outside the row of bristles, which 

 become successively longer and stronger downward; palpi dark 

 -,,^_^ brown; cheek one-half the eye height; eyes distinctly hairy; 

 beard white. 



