246 Psyche [December 
second s. m. narrow, narrowed about one-half above; pleura very densely covered 
with shining white hair; middle and hind spurs black; anterior legs black; middle 
red, the femora black above; hind legs red; abdominal segments 1 to 6 covered 
with pale ochreous-tinted hair, no definite light patch on first, but a small discal 
area where the hair is thinner, and there are a few reddish scales; second segment 
with a broad basal band of reddish hair, not reaching the sides, third with a nar- 
rower band of the same kind. 
Var. a. Smaller; Midde femora black, as also outer side of their tibize; hind 
femora black except at apex, and their tibiz suffused with blackish on outer side; 
first abdominal segment with a transverse, rather poorly defined black (bare) 
band; second with the basal half black except at sides. This looks distinct, but is 
probably only a variety, as Argyroselenis minima Rob. varies in much the same 
manner as to the abdomen. It is the var. a. which most resembles E. argyreus. 
Clisodon terminalis Cress. One female at Chamenerion angustifoliwm. 
Melissodes hymenoxidis Ckll. Females at Grindelia, also nesting in ground. 
Two were observed to enter the same nest. 
M. confusa Cress. Both sexes at Grindelia. 
M. confusiformis Ckll. One female at Grindelia. 
M. menuacha Cress. One male at Grindelia. This is the same as the New 
Mexico insect I have identified as menuacha, but differs from a Colorado example 
(not the type) from the Cresson collection. I believe it is the real menuacha, 
and that Cresson confused two or more species in his collection. 
Coelioxys porterae Ckll. One female on sand. 
Megachile wootoni calogaster Ckll. One female at Campanula petiolata. 
Megachile pugnata Say. Females at Grindelia. 
Megachile perihirta Ckll. One male at Grindelia. 
Megachile relativa Cress. Females at Grindelia. 
Alcidamea simplex Cress. Females at Phacelia. 
Osmia copelandica Ckll. Female at Phacelia. The second known specimen. 
Osmia pentstemonis Ckll. One female at Grindelia. 
Osmia wardiana Ckll. One female at Grindelia. This is narrower than usual, 
but apparently not a distinct species. 
Osmia fulgida Cress. Two females at Phacelia. These are green, and agree 
with the form named viridis by Cresson, except that the hair of the thorax above, 
instead of being black, is reddish with a few black hairs intermixed. 
Osmia densa Cress. Two females, one at Grindelia. A variable species. 
Osmia grindeliz n. sp. One at Grindelia. Var. a. at Phacelia. 
Q. Length about 9mm.; the abdomen subglobose; head about as wide as 
thorax, dark greenish and purplish, densely punctured; clypeus mainly dark 
purplish; cheeks olive green; face, front and vertex with long coarse black hair, 
occiput with some white hair; mandibles tridentate; flagellum faintly reddish 
beneath except at base; mesothorax black on disc, green at sides; scutellum and 
postscutellum olive-green, but metathorax dark bluish; hair of thorax above 
white, with long black hairs sparsely intermixed; of pleura black, comparatively 
short, of sides of metathorax white; tegule piceous; wings stained with brown; 
legs black, not metallic; abdomen dark green, the hind margins of the segments 
