62 E. T. CRESSON. 



Paniirgiis regularis.— ^. — Black, rather shining; head and thorax 

 clothed with a long rather dense cinereous pubescence, very slightly mixed 

 with black; head not wider than thorax, vertex smooth, almost nude and 

 polished, ocelli arranged nearly in a straight line; occiput with a few black 

 hairs; thorax delicately punctured, densely pubescent, that on mesothorax 

 sometimes faintly tinged with ochraceous; base of metathorax opaque; wings 

 faintly tinged with dusky, second submarginal cell much narrowed towards 

 marginal, receiving the first recurrent nervure near the base and the second 

 one-fourth from the tip; legs with rather long whitish pubescence; abdomen 

 oblong-ovate, subdepressed, clothed with a short suberect pale pubescence 

 slightly mixed with black, at the base and sides it is longer, apical margin 

 of each segment with a regular narrow fascia of dense white pubescence. 

 Length .40 inch. 



Hah. — California, (Henry Edwards). Three specimens. This has 

 much the general appearance of an Andrena, 



Paniirgus andrenoides. — %. — Black, shining, clothed with a long 

 whitish pubescence, most dense on face and sides of thorax; head broader 

 than thorax, sinuate on posterior margin ; face very broad, ocelli arranged in 

 a slight curve; clypeus, except two black points, and spot on each side of face, 

 pale yellow ; mandibles long and slender; antennse long, scape with long hairs, 

 flagellum fulvous beneath; tegulse piceous; wings hyaline, iridescent, nervures 

 and stigma brov/n, second submarginal cell three-fourths the length of the first 

 submarginal, receiving the first recurrent nervure one-fifth from the base and 

 the second same distance from the tip; legs slender, clothed with long pale 

 pubescence; abdomen oblong-ovate, shining, thinly clothed with a short pale 

 pubescence, when vievved in cei'tain lights the apical margins of the segments 

 have a narrow fascia subinterrupted medially. Length .36 inch. 



Hah. — Colorado, (Morrison); Texas, (Belfrage). Six specimens. 

 Very closely resembles certain species of Andrena. 



Pauurgus nigrirrons. — %. — Form of andrenoides; entirely shining 

 black, delicately punctured, rather thinly clothed with long pale pubescence; 

 head wider than thorax, face very broad, clypeus large, flat, sparsely punc- 

 tured, the tip squarely produced and slightly reflexed, the margin subemar- 

 ginate; mandibles long, acute, and reddish at tip; cheeks flattened, the upper 

 margin carinate; antennae long, flagellum brownish; tegulse dull testaceous; 

 wings hyaline, slightly dusky at tips; second submarginal cell nearly as long 

 as the first, narrowed nearly one-half towards marginal and receiving the 

 recurrent nervures one-fifth from base and apex respectively; legs brown, 

 clothed with pale pubescence ; abdomen elongate, subdepressed, polished, thinly 

 clothed with short pale pubescence. Length .26 inch. 

 Hah. — Texas, (Belfrage). One specimen. 



Panurgus marginatus. — J. — Black; head subopaque, flattened, not 

 wider than thorax, clothed with pale pubescence, that on occiput and thorax 

 above short, dense and dull fulvous; clypeus short, very transverse, truncate 

 at apex, which is fringed with long hairs; antennse short, flagellum pale 

 testaceous beneath towards apex; sides of thorax with long pale pubescence; 

 metathorax sparsely pubescent, the enclosed space at base very well marked, 

 flattened and minutely sculptured; wings as in andrenoides; legs subrobust. 



