ART. 20 REVISION" OP THE GENUS WINTHEMIA ^REINHAKD 23 



Wings grayish hyaline tinged with brown near base; fourth vein 

 with a rounded rectangular bend strongly curved inward beyond 

 reaching costa about one-half the length of hind cross vein before 

 exact wing tip ; third vein with one or two hairs at base ; costal spine 

 minute. 



Female. — Front at vertex 0.3 and 0.272 of the head width in 

 two specimens; parafrontals golden pollinose to vertex; inner and 

 outer verticals developed, the usual orbitals present; palpi thick- 

 ened and yellow on apical half; cheeks and face densely pale-gray 

 pollinose; parafacials distinctly narrowed downward, inconspicu- 

 ously short-haired; thorax covered with thick gray pollen tinged 

 with yellow on mesonotum, which is marked with four distinct 

 narrow shining black stripes; last three abdominal segments polli- 

 nose on about basal half, the remainder shining, second segment 

 bearing a pair of stout median marginal bristles, fourth with a mar- 

 ginal and a discal row slightly beyond the middle ; hind tibiae ciliate 

 with one longer bristle in the row near middle, claws and pulvilli 

 short; otherwise as in male. 



Length, 7.5 mm. 



Type. — Male, in the American Museum of Natural History. 



Described from 7 males and 2 females received from C. H. Curran, 

 collected at Wigwam Inn, Burrard Inlet, British Columbia, June 

 3 to 10, 1930 (G. R. Hopping), reared from "Western Hemlock 

 Looper." 



The species is related to TF. ahdoniinalis from which it differs in 

 having thinner and paler pollen on the last three abdominal seg- 

 ments and the hind margin of each more broadly shining ; the inter- 

 mediate segments conspicuously reddish at sides; less robust in 

 build. 



(H) WINTHEMIA ABDOMINALIS Townsend 



Neowinthemia abdominalis Townsend, Proc. U. S. Nat. Mua., vol. 5(5, p. 583, 

 1919. 



Last three abdominal segments almost wholly covered with strik- 

 ing thick pale-golden pollen, which instantly distinguishes the 

 species in the male sex. The female is unknown. 



Male. — Front at narrov,^est part 0.17 to 0.21 of the head width 

 (in three specimens), hardly widening to about the middle thence 

 rapidly to base of antennae ; parafrontals yellow pollinose becoming 

 velvety black toward vertex, rather densely pilose; median stripe 

 brownish black, before ocelli distinctly wider than one parafrontal; 

 inner verticals moderately strong; ocellars present; orbitals none; 

 frontal rows strongly divergent below antennae extending to level 

 with apex of the second joint, the upper bristles reduced in size and 

 stopping before the triangle; parafacials not much narrowed down- 



