19 16.] NATURAL SCIENCES OF PHILADELPHIA. 577 



as the firsi transverse cubitus is to the stigma on the radial vein, 

 nervulus interstitial and forming an acute angle with the first abscissa 

 of the discoidal vein, legs blackish brown except for the tarsi which 

 arc more or less brownish stramineous, legs covered witli blackish or 

 dark brown hairs, scopa typical, its hairs of a blackish brown hue 

 and concolorous throughout, hind metatarsi at most apparently as 

 wide as mid met al arsi ; propodeum with its enclosure poorly defined, 

 finely reticulated, not at all rugose, rest of upper face of propodeum 

 sculptured somewhal like the mesopleurae but covered with ochreous 

 hair, propodeal pleurae finely reticulate and with sparse indefinite 

 punctures, not hidden by the poorly developed blackish fioccus; 

 abdomen with its tergum shining, finely reticulated and finely 

 punctured, the punctures poorly defined and from two to six or more 

 puncture widths apart on the first tergite, second, third and fourth 

 tergites sculptured much like the first tergite, second tergite with its 

 elevated portion down the middle : depressed portion :: 29 : 10, 

 fifth tergite with its sculpture of the same kind as the preceding 

 tergite, pygidium black, almost planate and nearly pointed at apex, 

 dullish, without an enclosure, tergum with rather conspicuous blackish 

 hairs, second, third and fourth tergites without a hair band, fimbria 

 blackish brown. A paratopotype has the hair of the dorsulum and 

 -cut el reddish and the labrarea truncate, the truncature as wide as 

 the length of the labrarea down the middle. 



Andrena lAndrena) sola new species. 



Type- — Xo. 4,047. The Academy of Natural Sciences of Phila- 

 delphia.. 



Type Locality. — Southern California (H. K. Morrison). 



Related to A. (A.) subtilis Smith, and probably a small variety of 

 that species. 



Female. — Length 11 mm.; body black, mostly covered with 

 pale hairs; head with its facial line : transfacial line :: 63 : 84, 

 axial line : temporal line :: 33 : 21, malar line : joint 3 of antennas 

 :: 1.5 : 10, elevated portion of malar space virtually wanting, head 

 covered with pale ochreous hairs, front finely longitudinally striate 

 on each side of a well-developed median longitudinal crista, not 

 elevated along the inner foveal edge, fovea at most : ocellocular 

 line :: 12 : 17, foveal band well developed, polished and sparsely 

 punctured, fovea nearly contiguous to the upper end of the inner 

 eye margin, distance between fovea and ocelli at the latter 

 point : ocellocular line :: 1 : 17, fovea constricted near its middle 

 where it is apparently only two-thirds as wide as the greatest width 



