39 ; Myron Harmon Swenk 
small, almost T-shaped because of the uniformly very narrow base, which 
is ridged laterally, and the very narrow downward prolongation. Tegulae 
dark. Wings long, slightly darkened, nervures ferruginous to dark brown, 
stigma dark ferruginous. Legs black, clothed with grayish white pubes- 
cence, longer and denser on posterior femora and tibiae, inner tarsal apices 
with golden tufts. Basal joint of hind tarsi slender, over three times as 
long as broad, intermediate joints two and one-half times as long as broad. 
Anterior coxae unarmed, claws medially toothed, hind spur of hind tibiae 
finely cilio-pectinate, all the spurs reddish. Abdomen stout, suboval, seg- 
ment 1 with the punctures rather large and well-separated, becoming finer 
and very close apically, and bearing long, sparse, gray hairs which form a 
short, denser fringe down the lateral margin; segment 2 and following 
uniformly much more finely and closely punctured than 1, with short, 
sparse, gray hairs mixed with a few scattered, dark ones on segments 3-6. 
Apical margins of segments 1-5 with fasciae of whitish hair, narrow and 
generally worn on 1 and 2, broader on following, all narrowly continued 
on venter, the apical margins not depressed. 
6. Length 10-12 mm. Differs from the @ as follows: Pubescence 
longer, that on clypeus long and dense, whitish; black dorsal hairs on 
thorax reduced, confined to scutellum; anterior femora thinly bearded 
with long hair; antennae long, reaching beyond tegulae, joint 3 about five- 
seveniths of 4, middle joints five-sevenths as broad as long; abdomen more 
densely punctured, fasciae on segments 1-6 continued more narrowly on 
venter; hind tarsi narrow, their basal joints five times as long as broad, 
intermediate joints over twice as long as broad. 
Genitalia—Stipes notched, its apex flat and broad; sagittal rods parallel, 
thickened on basal two-thirds; volsella moderate; seventh ventral plate 
with costae, both internal and external, widely detached from the lobes; 
the external costa falciform and detached for one-half its length, equaling 
the lobe in length, the internal costa clavate and separated nearly its entire 
length. (Plate 1, figures 6 and 6a.) 
Type Locariry.—Indiana ; type lost. 
This was the first Colletes to be described from North America. 
It was characterized and named by Say in 1837 from specimens 
taken in Indiana. His description being rather short and general, 
some confusion as to the correct identity of his species resulted 
from the loss of the type, so that Mr. Cresson redescribed it in 
1868 under the name propinqua, doubtfully identifying another 
species (armatus Patton) as inaequalis, Eleven years later Mr. 
Patton placed it under its proper name, showing propinqua to be 
a synonym, and redescribed Cresson’s iaequalis as armata. Mr. 
Charles Robertson, in corroboration of Patton’s identification of 
72 
