CERATOMYIELLA AND PAKADIDYMA EEINHARD 33 



long pale hairs on under side near the tip; back of head blackish, 

 thinly gray pollinose, rather sparsely clothed with pale hairs. 



Thorax and scutelliim black, dusted with gray pollen; mesonotum 

 marked with four black vittae, outer pair not interrupted at suture ; 

 chaetotaxy as in validinerms; infrasquamal hairs absent; postscu- 

 tellum normal; calypters pale yellowish white. 



Abdomen black and shiny ; last three segments with dense grayish- 

 white pollen bands, which are wider on the sides of the intermediate 

 segments and narrowed at the middle above, especially on the second 

 where the pollen is confined on the basal margin; first segment 

 without median marginals; second with one pair; third and fourth 

 each bearing a marginal row of about 10; fourth segment without 

 discal bristles; venter pale haired. 



Legs black, basal segments reddish ; front tarsal segments swollen, 

 the claws and pulvilli minute or atrophied; hind tibia with three 

 large and several small bristles on outer posterior edge. 



Wings infuscated, a little paler along the hind border; venation 

 normal ; third vein with hairs extending almost to small cross vein ; 

 apical cell open shortly before wing tip; costal spine strong; 

 epaulets black. 



Length. — 7 mm. 



Male. — Unknown , 



T'y;?^.— Female, U.S.N.M. no. 44768. 



Remarks. — Described from two females in the United States 

 National Museum, collected at Huariaca, Peru, December, 1921, by 

 Dr. C. H. T. Townsend. 



(18) PARADIDYMA APICALIS, new apecies 



Male. — Front at vertex 0.258 of the head width (average of five: 

 0.24; 0.26; 0.26; 0.27; 0.26), hardly wider to middle, thence 

 diverging to antennae where it is rather prominent in profile; 

 median stripe reddish brown, nearly as wide as one parafrontal on 

 most of its length; ocellars present; verticals one pair (inner) 

 developed ; orbitals absent ; f rontals five or six in number, the rows 

 moderately divergent beneath antennae extending to apex of second 

 segment, uppermost bristle stouter, reclinate; paraf rontals covered 

 with dull gray pollen to vertex, moderately clothed with rather 

 coarse black hairs; face receding and concave above the mouth in 

 profile, its ridges not very prominent, haired on lower fourth or 

 less; paraf acials densely gray pollinose, a row of bristles along the 

 inner margin becoming longer and stronger downward, the largest 

 approximating the frontals in size, bare outside the main row of 

 bristles below level of arista; vibrissae situated on oral margin; 

 antennae about as long as face, basal segments subequal in length. 



