﻿194 POMONA COLLEGE JOURNAL OF ENTOMOLOGY 



central portion are more sparsely haired. A tuft of very long hairs projects 

 outward from base of the hairy portion of each wing. 



Type locality — Guadalajara, Mexico. Described from eight specimens. 

 Colletes dilatata n. sp. 



Female — Length 9-10 mm. Stout, black with griseous pubescence. Head 

 broader than long, eyes converging below. Face sparsely covered with 

 griseous pubescence, sometimes nearly nude ; thickly covered with medium 

 sized punctures. Clypeus broad, convex, shiny, with large, long, shallow 

 punctures, forming longitudinal striae, depressed into a median sulcus in mid- 

 dle, truncate at apex. Mandibles dark, reddish at tips. Malar space very 

 short, about one-eighth as long as broad. Supra-clypeal area smooth except 

 for a few fine punctures around margin. Antennae black, sometimes brown 

 beneath. Vertex shining, smooth except between ocelli, where it is finely 

 punctured. Hair on vertex almost entirely black. Hair on under side of 

 head white, not dense ; that on mouth parts, golden yellow. 



Thorax — Stout, rather shiny. Mesothorax covered anteriorly and on 

 sides with short griseous pubescence, covered with large, round punctures, 

 more crowded anteriorly, entirely lacking on a large disk. Ajjical margin 

 with a narrow band of small punctures. Scutellum, covered on sides with 

 tufts of longer hair, the black quite conspicuous and mostly inside of the 

 patch of white. Anteriorly smooth and shiny, the sides and posterior half 

 with a few very large, round punctures. Postscutellum — sparsely pubescent, 

 almost nude, closely punctured, rugose. Superior face of metathorax nor- 

 mal, with ten or twelve rectangular pits. The posterior face has the enclosure 

 funnel shaped, the neck rather narrow, the bowl divided by a number of ridges 

 forming more or less noticeable pits joining those of the superior face. Lateral 

 areas of posterior face closely punctured with large shallow punctures, the 

 sides with rather long pubescence, mostly light colored. The mesopleura 

 are shiny, with large round punctures, and a few very small ones between ; 

 pubescence sparse, long and white. Prothoracic spine, long and sharp. Wings 

 hyaline ; nervures and stigina dark ; tegulae, black. 



Abdomen — Stout, shiny, wide at base, suddenly narrowed at apex ; first 

 segment almost smooth anteriorly, becoming finely, densely punctured to- 

 ward apex ; remaining segments finely, closely punctured. Abdomen prac- 

 tically nude except for the sparse white pubescence on the anterior part of 

 first segment, and the white fasciae on the apex of segments one to five. 

 The first fascia is quite narrow ; the rest rather broad. On the fourth and 

 fifth segments are a few spiny black hairs, becoming yellowish on the sixth. 

 Pubescence on under side of abdomen rather dense, and of an ochraceous color, 

 except for the faint, lighter colored fasciae. 



Legs — Stout, dull black ; first tarsal joint stout, about two and one-half 

 to three times as long as broad. Pubescence on inner side of hind femora long, 

 white and silky, that on outside shorter. Tibial scopa white and dense. 

 The apices of inner tarsi clothed with golden hairs. The tibial spurs are 

 long, and yellowish ; the inner ones finely pectinate. Claws light, medially 

 toothed. 



