SOME BEES FROM COLORADO. 101 
prominent ; face broad; antenne black ; front extremely densely and 
minutely punctured ; mesothorax closely punctured ; area of meta- 
thorax densely sculptured, punctostriate ; hind spur with short teeth. 
The largest American member of the H. twmulorum group, easily 
known from H. arapahonum, Ckll., by the duskier wings and dark 
tegule and antenne, as well as the greater size. The clear white 
abdominal bands are also peculiar. 
Halictus frasere is closely related to H. virgatellus, Ckll., but 
differs in the colour of the tegule and the abdomen. Possibly 
the two may prove to be races of a single species. 
Hab.—Tolland, Colorado, at flowers of Frrasera, July, 1915 
(L. A. Kenoyer). 
Halictus dasiphore, Cockerell. 
Kingston, Colorado, on flowers of F'rasera, just above timber- 
line, July, 1915 (Kenoyer) ; Nebraska Hill, Colo., on Polemonium 
confertum flowers, July 18th (Kenoyer). New to Colorado. 
Falictus inconditus, sp. u. 
9. Length about 7 mm., anterior wing about 5:4; black, with 
scanty pale pubescence; head rather broad; clypeus prominent, 
shining, with scattered punctures more or less running into 
grooves; supraclypeal area shining, minutely punctured; mandibles 
black ; antennze black, the flagellum very obscurely fuscous beneath ; 
front perfectly opaque, as also the sides of the vertex; meso- 
thorax with very little hair, shining, extremely finely punctured, 
with a microscopical lineolation between the punctures ; scutellum 
also shining and finely punctured, depressed in middle; area of meta- 
thorax semilunar, appearing entirely granular under a lens, but 
actually covered with very fine anastomosing ridges, between which 
are exceedingly delicate cross-lines; posterior truncation of meta- 
thorax rounded at sides above; tegule piceous with a dark reddish 
spot; wings hyaline suffused with brown, stigma and nervures 
dark rufofuscous ; legs black, with white hair; hind spur of hind 
tibia with two large very oblique teeth; abdomen shining, the 
depressed apical portions of the segments not discoloured ; no hair- 
bands or patches; ventral segments fringed with white hair. 
Hab.—Tolland, Colorado, at flowers of Frasera, July, 1915 
(L. A. Kenoyer). 
This is separated from the species it most resembles, thus : 
Area of metathorax with coarse ruge .. . . pectoralis, Smith. 
Area of metathorax very finely sculptured .... 1. 
1. Vertex on each side of ocelli dull and roughened ; tegule with- 
outa clear red spot . . . . ineonditus, Ckll. 
Vertex on each side of ocelli smooth; tegule partly clear ferru- 
ginous .. .. macowpinensis, Rob. (including divergens, Loy.). 
