90 Mr. T. D. A. Cockerell on Bees of the 



minutely sculptured and with large rather close punctures ; 

 no median inipunctate area. Basal process of labrum broadly 

 triangular. Hairs fringing labrum and on lower part of 

 elypeus dark brown, with a reddish tint. Antennse short; 

 first joint of flagellum as long as the two next together, tip 

 of tlagellum becoming reddish brown. Sides of face with 

 broad pale greyish-ochreous bands of appressed pubescence. 

 Tegulaj piceous. Wings with the outer margin broadly tinged 

 dusky. Stigma darker than in male. Abdomen with four 

 very distinct pale grey hair-bands, all continuous. Anal 

 fimbria dark grey-brown, with rather a chocolate or purplish 

 tinge. The elypeus may have a narrow median inipunctate 

 line. 



Hah. College Farm, Mesilla Valley, N. M., on flowers of 

 pkim, Ajnil 9, 1895 (one male, one female) ; April 10, 1895 

 (one female) ; March 25, 1896 (one female) ; March 26, 1896 

 (one male). Also on Sisymbrium^ April 12, 1895 (one male), 

 and April 16 (one female). 



Miss Casad had descrilDed the two sexes as distinct species, 

 and 1 should myself have treated them as such but for the 

 circumstances of their capture. They do not differ, however, 

 as much as the sexes of A. vicina, though in a different way. 

 A. placida, Sm., must be a similar species, but the abdo- 

 minal bands in the female are not entire. The description of 

 A. verecunda, Cr., almost exactly applies, but that iias the 

 anal fimbria cinereous, whereas the dark anal fimbria is 

 perhaps the most noticeable feature of electnca. 



tt Abdomen without Lair-bands ; stigma ferruginous. 



Andrena mesiUce, Ckll., sp. n. 



(J. Length about 11 millim. Quite stout, with the abdo- 

 men oval, convex, shining ; black, the jjubescence silky, 

 greyish white, very copious on head and thorax, practically 

 wanting on abdomen, except on first and second segments, 

 which are delicately pruinose-pubescent, the pubescence 

 dense enough at the sides to be rather conspicuous. Head 

 rather large, a little broader than long. Clypeus concealed 

 by dense white pubescence; front mostly bare, striatulate; 

 vertex with rather sparse punctures. Cheeks swollen behind. 

 Antennae rather long, dark chocolate-brown ; first joint of 

 flagellum very short, no longer than second. Mandibles 

 entirely dark. Thorax densely pubescent, the pubescence of 

 the same colour throughout, nowhere at all ochraceous ; en- 

 closure of metathorax bare, with no raised rim, dull, minutely 



