Genus Andrena/ojoicZ in New Mexico. 89 



and extreme base of second segments, and again the adjacent 

 parts of the second and third ; the hind margins of segments 

 '6 and 4 also narrowly orange, just before the hair-bands. 

 Continuous fulvous or ochraceous hair-bands at the apical 

 margins of all the segments. Venter orange on second and 

 part of third segments. 



Hah. Santa Fe, N. M. [Myrtle Boifle). Taken in 1895, 

 almost certainly in July or August. Not much like anything 

 known to me. 



(c) Fairly large species ; clvpeus dark iu the S ; pubescence 

 grey or slightly ochreous. 



t Abdomen with bair-bands, more or less developed even in 

 the S; stigma dark brown. 



Andrena electrica, Casad & Ckll., sp. n. 



(^. Length 10 to 11 millim. Entirely black, the terminal 

 joints of the tarsi only becoming brownish ; pubescence 

 copious and long on head and thorax, silky, greyish white, 

 shining white on clypeus, pleura, and occiput, as also on 

 cheeks, where it is very long and erect. Antennge long, 

 wholly brown-black, first joint of flagellum not nearly so long 

 as second and third together. Head subquadrate, considerably 

 broader than long. Mandibles wholly dark, toothed within. 

 Basal process of labrum emarginate. Clypeus hidden by the 

 hairs; front and vertex bare, front dull, minutely striatuUxte; 

 vertex minutely roughened, with a few punctures near the 

 top of the eyes, a small smooth space immediately laterad of 

 the lateral ocelli. Punctures of mesothorax and scutellum 

 rather sparse ; enclosure of metathorax dull, ill-defined, with 

 no raised margin, not wrinkled. Tegulaj brown. Wings 

 clear hyaline; nervures and stigma brown; second submar- 

 ginal cell quite broad. Abdomen moderately shining, micro- 

 scopically tessellate, with very miimte sparse punctures. 

 First segment and sides of second witli fairly abundant erect 

 hairs, not concealing the surface ; the remaining segments 

 with scattered short pale hairs, looking like fine dust, dense 

 enough on the apical margins to give the appearance of 

 narrow, more or less interrupted, ill-detined bands. Margins 

 of ventral segments with well-defined white hair-bands. 



? . Larger and stouter, 11 to 12 millim. long. Pubes- 

 cence tinged with greyish ochreous, especially on dorsum of 

 thorax, iiowhere really white, except on hind femora and the 

 floccus on hind trochanters. Pubescence of face shorter and 

 more sparse, permitting the clypeus to be seen. Clypeus 



