Specific Characters in the Bee Genus Colletes 45 
segments punctured like the margins of the second. The first segment is 
covered discally with scattered, long, pale hairs, densest on the basal trun- 
cation except down the sides, where they are short and dense, forming a 
fringe; the next two segments have short and inconspicuous, scattered, 
pale hairs; the rest of the segments have longer, more bristle-like hairs, 
all pale. The fasciae are on apical margins of segments 1-5 and are even 
‘and snow-white, contrasting conspicuously with the polished abdomen, the 
first one being reinforced by another one on base of segment 2, but these 
two together are much narrower than the others, and especially medially. 
They are continued on the venter as conspicuous, long, dense, bristle-like, 
white scopal fringes. Apex inclining to ferruginous. 
3. Unknown. 
Type LocaLity.—Comal county, Texas; type in collection of 
the American Entomological Society. 
This species was originally described by Mr. Cresson from a 
unique female collected in Comal county, Texas. Mr. Cockerell 
records another specimen, a female taken at Las Cruces, New 
Mexico, on Salix, May 2. I have two specimens taken at Fedor, 
Texas, March 21, 1899, and April 4, 1902, respectively, both 
‘females. 
SPECIMENS EXAMINED—Texas:: Fedor, 2. 
Colletes algarobiae Cockerell. 
1990. Colletes algarobiae Cockerell, The Entomologist, xxxiii, pp. 244- 
45, 2 & (September, 1900); original description. 
1906. Colletes algarobiae Cockerell, Transactions of the American En- 
tomological Society, xxxii, p. 292 (October, 1906); recorded 
from Mesilla Valley on basis of types. 
“9 Length 8% mm., similar to C. prosopidis, but larger; flagellum 
wholly dark; the white pubescence of vertex, mesothorax, and scutellum 
(particularly the last) with blackish hairs intermixed; hind margins of 
ventral abdominal segments whitish hyaline. Wings hyaline, nervures, 
and stigma black; abdomen with distinct and broad white hair bands; 
tegulae shining dark brown; mesothorax rather sparsely punctured; malar 
space much broader than long. Differs from the 2 of terana by the less 
conspicuous black hair of thorax, differently sculptured metathoracic en- 
closure (that of texana being divided by the ridges into square portions) 
and especially by the much smaller and less crowded punctures of the 
mesothorax. 
dS. Resembles C. prosopidis, but is larger, with the very long flagellum 
only dull brownish beneath, and conspicuously, though finely, pubescent ; 
second submarginal cell much broader, less narrowed above; enclosure of 
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