3G8 
NEW NORTH AMERICAN BEES 
brown or black hairs, scopa nearly typical, its hairs blackish throughout and 
at most only as long as the greatest w'idth of the hind tibiae, hind metatarsi 
at most : mid metatarsi 13: 16; propodeum with its enclosure well defined, 
dullish and finely reticulated, finely regulose and with vestigial ridges at base, 
rest of upper face of propodeum sculptured somewhat like the mesopleura but 
not so shiny nor so distinctly punctured, and covered with fine whitish 
hair, propodeal pleura with sparse shallow punctures and dark hairs and 
almost hidden by the whitish fioccus; abdomen blackish brown with its 
tergum shiny and finely sculptured, the punctures fine and from two to six 
puncture widths apart on the first tergite, the punctures closer on the suc- 
ceeding tergites, second, third and fourth tergites w'ithout an apical hair 
band, apical edge of first, second, third and fourth tergites with a brownish 
stramineous border, second tergite with its elevated portion down the mid- 
dle: depressed portion :: 21: 10, fifth tergite shiny, reticulate, its punctures 
coarser than on the other tergites, pygidium slightly convex, without a 
shallow furrow on each side, rounded at apex, tergum covered with inconspic- 
uous dark hairs, fimbria dark seal brown. 
Andrena (Andrena) angustitarsata huardi new race 
Type. — No. 4051, The Academy of Natural Sciences of Phila- 
delphia. Type locality.- — California. (No further data.) 
Female. — Differs from typical A. (.4.) angustitarsata Viereck only in the 
ochreous color of its pubescence. 
Andrena (Andrena) argentiscopa new species 
Type. — No. 4044, The Academy of Natural Sciences of Phila- 
delphia. Type locality. — California. (E. Norton.) 
Related to A. (A.) hisalicis Viereck. 
Female. — Length 7 mm.; body black, mostly covered with whitish hairs> 
head with its facial line : transfacial line :: 45: 57, axial line : temporal line 
:: 23: 12, malar line : joint 3 of antennae :: 1.5: ?9, ocelloccipital line : greatest 
diameter of lateral ocellus :: 4: 4, elevated portion of malar space nearly want- 
ing, front rather finely, longitudinally striate, not elevated into a welt along the 
fovea, fovea at most : ocellocular line :: 5: 10, foveal band represented by a 
shining line at upper end of the inner eye margin, distance between fovea and 
ocelli: ocellocular line :: 6: 10, fovea slightly attenuated below its middle where 
it is nearly as wide as the greatest width of the fovea, the latter continued to a 
point far below the clypeal line, fovea filled with pale cacao brown hairs, on its 
upper half, with pale ochreous hairs on its lower half, face dulhsh, finely reticu- 
late, with indistinct punctures that are as many as three or four puncture 
widths apart, clypeus trenchantly elevated above the apical margin, slightly 
convex, sculptured like the face except that the punctures are larger and better 
defined, clypearea apparently wanting, clypeus thinly hairy, its sculpture not 
at all hidden by hairs, labrarea narrowly truncate its width at base : length 
down the middle : : 8:4, width at apex : length down the middle : : 3:4, lab- 
rarea at base nearly half as wide as the labrum, the latter with a fringe of pale 
golden hairs, labrum with a median longitudinal crista between the labrarea 
and the apical edge of labrum, joint 3 of antennae probably : 44-5. :: 9: 8, joints 
