394 
NEW NORTH AMERICAN BEES 
shiny, finely indistinctly reticulated and finely, closely punctured, the punc- 
tures mostly adjoining or nearly adjoining, notauli represented by a shiny line, 
mesojileura punctured and finely reticulated, the punctures mostly two to 
four puncture widths apart, scutel nearly bare and almost polished, finely, 
indistinctly punctured, metanotum thinly hairy and not much more sculptured 
than the scutel, tegulae mostly browmish stramineous, partly polished, wing 
base brownish stramineous, partly with a blackish tinge, subcosta black, stigma 
dull stramineous with its lower boundary blackish, rest of veins dull stramine- 
ous, first recurrent vein received by the second submarginal cell before the 
middle and as near or nearly as near to the first transverse cubitus as the first 
transverse cubitus is to the stigma on the radial vein, nervulus almost inter- 
stitial and fonning an acute angle with the first abscissa of the discoidal vein, 
membrane uniformly tinged with brown, legs blackish except for the tarsi 
which are more or less dark brown, legs covered with whitish or pale golden 
hairs, scopa atypical, its hairs very plumose, pale ochreous and so densely ar- 
ranged as to nearly hide the tegument, hairs at base above not appreciably dark- 
ened, greatest width of hind metatarsi : greatest width of middle metatarsi : : 15 : 
19; propodeum with its enclosure poorly defined, shiny and finely reticulated, 
except in the middle at base where it is somewhat wrinkled, rest of upper face of 
propodeum sculptured somewhat like the inesopleura but more densely, and 
covered with finer whitish hair, propodeal pleura shiny, -with sparse shallow 
punctures and finely reticulated, propodeal floccus whitish; abdomen with 
its tergum shiny almost polished and punctured, the punctures fine and mostly 
from four to eight puncture widths apart on the first tergite, the punctures a 
little larger and much closer on the succeeding tergites, first, second, third, and 
fourth tergites with an apical, whitish hair band that is interrupted in the 
middle of the first, apical edge of first, second, third, and fourth tergites with 
a broad pale stramineous border, second tergite with its elevated portion down 
the middle : depressed portion :: 20: 15, fifth tergite dullish, reticulate, its 
punctures closer together and coarser than on the other tergites, pygidium 
nearly planate, rather coarsely sculptured, rounded at apex and with con- 
verging sides, tergum with inconspicuous, pale, nearly appressed hairs in ad- 
dition to the hair bands, fimbria pale, dull, golden on the fifth tergite, bright 
yellowish golden on each side of the pygidium. 
Andrena (Ptilandrena ) determinata* new species 
Type. — No. 4070, The Academy of Natural Science of Phila- 
delphia. Type locality. — North Andover, Massachusetts, 
August 18, 1865. (J. H. Emerton.) 
Related to A. (P.) biscuteUata Viereck. 
Female.^ — Length 9.5 mm.; body black, mostly covered with whitish hairs; 
head with its facial line : transfacial line :: 46: 62, axial line : temporal line 
:: 25: 14, malar line : joint 3 of antennae •:: 1:8, ocelloccipital line : greatest 
diameter of lateral ocellus :: 6:4, elevated portion of malar space virtually 
wanting, head covered with whitish hairs, front elevated medially, rather 
® This specific name was jnoposed for this species by Prof. \V. M. Davis. 
