382 
NEW NORTH AMERICAN BEES 
subcosta dark brown, stigma pale brownish stramineous, first recurrent vein 
received by the second submarginal cell a little beyond the middle but 
not as near to the second transverse cubitus as the first transverse cubitus is to 
the stigma on the radial vein, nervulus interstitial, forming an acute angle 
with the first abscissa of the discoidal vein, membrane with a uniform 
yellowish brown tinge, legs blackish brown excepting the small joints of 
the tarsi which are brownish, legs covered with whitish hairs, hind 
metatarsi at most hardly wider than middle metatarsi and nearly half as 
wide as hind tibiae at apex of the latter; propodeum with its enclosure 
poorly defined, with irregular rugae on basal half, finely reticulated oir apical 
half, rounded off at apex, rest of upper face sculptured somewhat like the meta- 
notum and covered with whitish hair, propodeal pleura sculptured apparently 
like the mesopleura, the sculpture not at all hidden by the uniforndy dis- 
tributed whitish hairs; abdomen with its tergum shiny, finely reticulated and 
indistinctly punctured, the punctures mostly four or more puncture widths 
apart, first tergite with whitish erect hairs, second and following tergites with 
appressed whitish hairs, second tergite with its elevated portion down the 
middle : depressed portion : : 12:6, fifth tergite with its basal blackish portion 
covered with poorly defined punctures that are as many as six or more punc- 
ture widths apart, fifth, sixth and seventh tergites with a stramineous margin, 
anal process narrow, pale stramineous, rounded at apex, tergum with rather 
inconspicuous hairs that are supplemented on the sides of the second, third 
and fourth tergites by thin whitish apical hair bands, hair at apex of abdomen of 
a pale golden hue. 
Andrena (Andrena) mariposorum new species 
Type. — No. 4050, The Academy of Natural Sciences of Phila- 
delphia. Type locality. — Southern California. (H. K. Morri- 
son.) 
Related to A. (A.) salicmella Cockerell, of which it may prove 
to be a race. Professor Cockerell, who compared the type with 
a topotypic specimen of A. (A.) salicineUa Cockerell, says that in 
A. (A.) 7nariposorum the wings are longer, sculpture of clypeus 
not the same, etc. He avers that it is possibly a subspecies only. 
Female. — Length 8.5 mm.; body black, mostly covered with whitish hairs, 
head with its facial line : transfacial line :: 47: 59, axial line : temporal line :: 
22: 14, malar line : joint 3 of antennae :: 1:7, ocelloccipital line : greatest 
diameter of lateral ocellus : : 3 : 4.5, elevated portion of malar space virtually 
wanting, head covered with whitish hairs, front distinctly, longitudinally 
striate, not elevated into a welt along the fovea, fovea at most : ocellocular 
fine :: 6: 11, foveal band represented at upper end of the inner eye margin by a 
bevelled, bare space, distance between fovea and ocelli : ocellocular line :: 
5:11, fovea somewhat attenuated below its middle, and continued to a plane 
apparently half way between the clypeal and antennal line, fovea filled with 
pale ochreous or golden hairs, fovarea wanting, vertex and temples along the 
