T. D. A. COCKERELL. 157 



are bulbous; this is most noticeable on the first segment, and becomes less so on 

 each subsequent one, the band on the fifth being almost uniform; laterally the 

 bands are broadened, and that on segment 2 emits a large upward projection, 

 which is apt to get more or less rubbed ofi": sixth segment with au entire white 

 band, more or less narrowed medially ; venter largely silvery pubescent, segments 

 4 and 5 with short fringes of pale yellowish curled bristles ; apex rounded, black ; 

 in some specimens is projected a pale testaceous plate, minutely emarginate in the 

 centre, producing a pair of low rounded lobes, laterad of which is a deep notch. 



f . — Length 10 mm.; agreeing with the % in color and ornamentation: py- 

 gidial area at apex of abdomen large, rounded, beset with short, brilliantly golden 

 scales, placed some distance apart on a dark field. 



Hab. — Fifteen males at the Canaigre factory, Deming, New Mex., 

 on flowers of Verbedna encelioides July 9, 1896 (CklL). One 9 

 taken at Las Cruces, New Mex., by Prof. Townsend several years 

 ago. I have never taken it at Las Cruces myself. It somewhat 

 resembles E. doiiatus Sm., and especially E. tepaneeus Cresson. Mr. 

 Fox, to whom I sent a specimen, writes : " allied only to compaetus, 

 but is larger and sculpture of thorax is finer ; wings more darkly 

 margined. I am inclined to regard it as a variety of compaetus, 

 until other specimens have been found." But I have a good series, 

 and the species is certainly not compaetus. A single example of E. 

 compaetus was taken at Las Cruces by Prof. Townsend, years ago, 

 and determined for me by Mr. Fox. It differs from verbesince, in 

 addition to the characters mentioned, in the longer first joint of 

 flagellum, and in the color of the spurs. 



(22.) IleliKSOdes piilguis Cresson. 



A peculiar little species, known in the S by the dark wings with 

 a broad second submarginal cell, black pubescence of dorsum of 

 thorax ; pale yellow clypeus, labrum and spot on mandibles ; and 

 appressed fulvous pile on abdomen ; first joint of flagellum at least 

 half as long as second. 



I give a new description of the 9 , as I had some diflieulty in 

 identifying it from Cresson's description : 



9- — Length about 8 mm., stout, black. Head and thorax with short, thin, 

 white and mouse-gray pubescence, mixed with black. Abdomen with short ful- 

 vous pile, like velvet, but appressed. Head broad, shining, with large punctures, 

 especially large and close on the clypeus. which becomes subcancellate ; pul)es- 

 cence of face sparse, grayish, some black hairs between the antenna?, vertex with 

 black hairs, occiput and cheeks with short white hairs; antennte reaching to 

 tegulfe, wholly black, first joint of flagellum larger than the two following to- 

 gether. Thorax shining, with large close punctures; dorsal pubescence thin and 

 black, more dense on scutellum ; a very few short pale hairs intermixed, sides of 

 metathorax and pleura with grayish white hairs; tegulse black. Wings fuscous. 



TRANS. AM. ENT. SOC. XXIV. JUNE. 1897 



