T. D. A. COCKERELL. 187 



(6). Ainlrena <«lialybea (Cress.). 



Pannrgus chalyhseas Cr., Tr. Am. Eut. Soc, vii, p. 61. — California. 



Mr. Fox send.s a typical specimen, and also several from Southern 

 California. The mouth-parts are practically as in Andrena. Pro- 

 cress of labrum bidentate ; basal nervure straight. This is a deriva- 

 tion of the 1)1 ue Andrense, such as A. ccerulea. 



(7.) ParaiKlrena res;ularis (Cress.). 



Pannrgus regularis Cr., Tr. Am. Ent. Soc, vii, p. 62. — Calforuia. 



Mr. Fox sends a typical example. I am not sure this might not 

 forni a distinct genus ; it differs from typical Parandrena by the 

 wholly dark face in the S , the dense abdominal hair-bands, the 

 small stigma, the third discoidal cell with its apical angle less than 

 a right angle, the emarginate tip of the abdomen, and the longer 

 and more pointed maxillifi. 



(8). Parandrena iievadenwis (Cress.). 



Panurgiis nevadensis Cr., Tr. Am. Ent. Soc , vii, 214, % . — Nevada. 



Very close to andrenoides (Cr. \ but differs by its smaller size, 

 fulvous pubescence, smaller cheeks, and head not so bulging behind 

 the tops of the eyes. 



The $ is unknown. It will doubtless be found to have a dark 

 face and red abdomen, like the $ of andrenoides. 



(9.) Parandrena enniarplia n. sp. %. — Length about Hi mm 

 Subg. ch. — Autennse comparatively short; abdomen with dense hair-bands; 

 stigma small ; apical angle of third discoidal cell much less than a right angle. 



Sp. ch.. — Black, pubescence mostly white, but pale ochraceous on occiput and 

 thoracic dorsum. Head ordinary ; face not very broad, wholly dark, densely 

 covered with long white hair, which extends also onto the scapes of the antennae, 

 but ends abruptly on the front, leaving the shining and punctured surface of the 

 vertex entirely visible. The vertex is thinly clothed with black hairs, not 

 readily noticed, while the occiput has abundant long pale ochraceus hair. Cheeks 

 with white hair, quite long below. Antennae wholly dark; maxillse quite long, 

 acutely pointed ; maxillary palpi quite elongated ; mandibles slightly ferruginous 

 at tips; thorax clothed with long pubescence; mesothorax somewhat shiny, 

 strongly and closely punctured with a strong median groove; scutellum very 

 closely punctured, except the anterior border, which is nearly impunctate; 

 enclosure of metathorax dull, minutely tessellate, not bounded by a rim ; tegulae 

 testaceous; wings dull hyaline ; subcostal nervure black, the other nervures and 

 the stigma brown ; first recurrent nervure joining second submarginal cell almost 

 at its extreme base ; second submarginal narrowed about half to marginal ; legs 

 black, thickly clothed with long white hair; claws ferruginous; abdomen rather 

 long, strongly and closely punctured, except on the shining bases of the segments; 

 first segment with long hair, all the segments thinly pubescent ; the hind margins 

 of all the segments with dense, narrow, continuous snow-white hair-bands; 

 venter with little hair. 



TRANS. AM. ENT. SOC. XXV. DKCEMBER, 1898 



