290 Mr. T. D. A. Cockerell on new Bees 



segment impunctate. Ventral segments sparsely fringed 

 with black hairs. Apex truncate. 



San Rafael, March 16; Paso de Telaya, March 26, on 

 flowers of Ipomoea. 



Closely allied to M. atrata and bimaculata, but differs by 

 the wholly dark clypeus and pubescence. At Paso de Telaya, 

 April 7, on plant no. 9, was taken a female which I am obliged 

 to refer to atrata, Smith ; but the male of atrata was not 

 observed. In the U. S., Robertson has observed the allied 

 M. bimaculata visiting Ipomcea. 



(8) Melissodes floris^ sp. n. 



$ . Length about 9 millim. ; antenna? 6^ millim. Black, 

 with pale ochreous pubescence, whitish on lower part of 

 face and cheeks, mixed with black on scutellum, and a few 

 black hairs on hind part of mesothorax ; no black hairs on 

 vertex or occiput. Clypeus lemon -yellow, the dots repre- 

 sented by a black notch on each side, anterior edge black. 

 Labrum black. Mandibles dark ferruginous at tips ; no 

 yellow spot. Flagellum ferruginous beneath, its first joint 

 about one fourth length of second, not twice as long as funicle. 

 Head broad ; pubescence of face, occiput, and cheeks long 

 and fairly abundant. Thorax shining, tolerably closely 

 punctured. Tegular dark brown, pubescent. Wings clear, 

 with a slightly yellowish tinge ; nervures dark reddish 

 brown. Second submarginal cell not very oblique ; third 

 submarginal narrowed at least half to marginal, i^egs with 

 thin whitish pubescence, rufous on inner sides of basal joints 

 of tarsi. Claw-joints ferruginous. Abdomen black, the hind 

 margins of the segments broadly testaceous ; the surface, 

 especially of segments 3 and 4, more or less pale pruinose ; 

 thin subapical white bands of microscopical pubescence on 

 segments 2 to 5, that on 2 sometimes failing in the middle. 

 Base of first segment with long thin pale ochreous pubes- 

 cence. Dark portions of segments with black hairs. Extreme 

 apex with dark fuscous pubescence. The second segment 

 may show a basal hair-band like the subapical one. 



? . Stouter ; antennae short, reaching only to tegulse ; 

 flagellum only obscurely rufescent beneath ; clypeus black, 

 vertex with some black hairs. Wings, perhaps, rather more 

 dusky. Punctuation of mesothorax sparse ; abdominal hair- 

 bands on segments 2 to 4 broad, ochreous, that on 2 inter- 

 rupted broadly in middle, but basal band of 2 conspicuous 

 and entire; fifth segment and apex with greyish-black 



