30 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.83 



antennae shorter than face, mostly black, third segment rather 

 slender and about two and one-half times the length of second; 

 arista black, thickened on basal fourth, clothed with short hairs, 

 penultimate segment short; eyes distinctly hairy; back of head gray 

 pollinose, moderately pale haired below. 



Thorax and scutellum black, gray pollinose ; mesonotum with four 

 distinct black stripes before the suture and five behind, the outer 

 pair not interrupted at middle and stopping well in front of scutel- 

 lum; acrostichals, 3, 3 (first two behind suture small) ; postscutellum 

 normally developed, gray pollinose; infrasquamal hairs present; 

 calypters white with yellow margins. 



Abdomen broadly ovate, black, wholly covered with thick yellow- 

 ish-gray pollen; first segment without median marginals; second 

 with a closely spaced pair; third bearing a marginal row of about 

 eight; fourth with a discal row well behind the middle besides a 

 marginal row of weaker bristles. 



Legs black, trochanters red; front legs with the tarsal segments 

 laterally compressed and swollen, claws and pulvilli minute; mid 

 tibia with one strong bristle on outer front side near middle; hind 

 tibia with a scattering row of uneven bristles on outer posterior 

 edge. 



Wings grayish hyaline ; venation normal ; third vein bristly two- 

 thirds the distance to small cross vein ; apical cell open far before tip 

 of wing; costal spine long; epaulets red. 



Length. — 10 mm. 



Remarks. — Redescribed from one female specimen in the United 

 States National Museum, Atzcopotzalco, D. F., Mexico, August 31, 

 1922 (E. G. Smyth). 



(15) PARADmYMA ALDRICHI, new species 



Female. — Front at extreme vertex 0.25 to 0.27 of the head width 

 in three specimens measured; parafrontals black, thinly gray pol- 

 linose; median stripe reddish brown, about equal the width of one 

 parafrontal on entire length; the usual two proclinate orbitals 

 present; ©cellars rather weak, proclinate; inner verticals large, 

 outer ones not developed ; f rontals about five in the row, descending 

 to middle of second antennal segment, uppermost one stouter and 

 reclinate; antennae somewhat shorter than face, third segment 

 black, rather narrow at base and about two and one-half times 

 longer than the second, which is largely yellow; arista brown, 

 thickened at base and very slender on apical two-thirds, clothed with 

 short hairs to tip, second segment short; face moderately excavated, 

 hardly receding but concave above mouth in profile, its ridges bear- 

 ing a few bristly hairs next to vibrissae, which are situated on oral 



