54 Myron Harmon Swenk 
1903. Colletes bigeloviae Viereck, Transactions of the American Entom- 
ological Society, xxix, p. 62 (January, 1903); recorded from 
Beulah on strength of preceding record. 
1903. Colletes brevispinosus Viereck, Ibid., pp. 62-63, 2; original de- 
scription. 
1904. Colletes armatus Pierce, University of Nebraska Studies, iv, p. 24 
(April, 1904) ; recorded from Lincoln, Nebraska. 
1904. Colletes sp? Morice, Transactions of the Entomological Society of 
London, 1904, part 1, p. 27, pl. ix, figs. 57 and 58, ¢ (April, 
1904) ; illustration of armature and seventh ventral plate of 
Massachusetts specimen. 
1904. Colletes armatus Robertson, Canadian Entomologist, xxxvi, p: 275, 
2, p. 277, d (September, 1904) ; in table of Illinois species. 
1906. Colletes armatus Robertson, Science, xxiii, p. 309 (February, 
1906) ; season, food plants, 
1906. Colletes bigeloviae Cockerell, Transactions of the American En- 
tomological Society, xxxil, p. 291 (October, 1906); summary 
of above records. 
1906. Colletes brevispinosus Cockerell, [bid., p. 291; recorded from Beu- 
lah on basis of type series. 
1906. Colletes armata Cockerell, Ibid., p. 292; recorded from Beulah, 
Sapello canyon and San Ignacio, New Mexico. 
1907. Colletes armatus Lovell, Canadian Entomologist, xxix, no. 11, p. 
364 (November, 1907); recorded from Waldoboro, Maine. 
?. Length 10-11 mm. Head short and broad, orbits moderately con- 
verging. Clypeus moderately convex, uniformly coarsely striate-punctate 
and with a very few, scattered pale hairs marginally. Supraclypeal area 
dullish and with a few deep, round punctures. Face dull, crowded with 
shallow punctures, the foveae short and impunctate, its pubescence short, 
dense, grayish white. Vertex with irregularly scattered, large punctures 
and smaller ones between, on a dullish surface, fringed with long, stiff, 
black hairs and a few similar ochraceous ones posteriorly. Cheeks finely 
roughened, dullish, the pubescence long, very thin and white. Malar space 
very short, about one-eighth as long as wide. Antennae black, joint 3=4, 
which are longer than 5 and following joints, the proportion being 4:4 :3.5, 
the middle flagellar joints distinctly shorter than wide and lighter beneath. 
Prothoracic spine long, slender apically, very conspicuous. Pubescence of 
thorax mainly black, shortest and sparsest on the almost bare disk, longest 
and densest in a fringe on scutellum, and on the margins of the thorax, 
especially anteriorly, these margins also with pale ochraceous hair inter- 
mixed. Tubercles with a mat of appressed ochraceous pubescence chang- 
ing abruptly to gray on pleura, under parts, and a long, dense fringe down 
the sides of the metathorax. Mesothorax with very coarse, crowded, rather 
shallow and sometimes cancellate punctures laterally, these becoming much 
sparser and widely separated on a small disk, all on a finely striately rough- 
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