362 Mv. T. D. A. Cockerell — Descriptions and 



This looks like 31. aurigenia, but is readily separated by 

 the colour of the pubescence, dark mandibles, and dusky 

 nervures. From M. agilis suhagiVis it is easily known by the 

 much larger size, dusky nervures, and flagellum dark above. 

 It is very close to M. lupina, but that has a spot on mandibles, 

 and lacks the dark hair on scutellum. In my table in Trans. 

 Amer. Ent. Soc. xxxii. p. 77, it runs to M. perplexa, fi'om 

 which it is readily known by the colours of clypeus and 

 labrum. It could also run close to M. gilensis, which differs 

 at once by the broadly black lateral margins of clypeus, the 

 black labrum, and dusky wings. 



Melissodes bidentis, sp. n. 



$ . — Length 12 mm. 



Black, the flagellum dark ferruginous beneath, except 

 basally, wings strongly suffused with brown ; head and 

 thorax above with short dense pale ochreous hair, black at 

 sides of vertex ; hair of pleura pale ochreous, purplish black 

 along the front and on the lowest part; hair of legs black, 

 but the long scopa of hind tibipe and basal part of basitarsus 

 very pale reddish ochreous ; abdomen black, without pale 

 bauds, the sides, venter, and apex with black hair. Very 

 close to M. cnici, Rob., collected by Mr. Crawford at the 

 same locality, but at thistle flowers ; it differs from cnici by 

 the uniformly smaller size ; the redder wings, with apex of 

 marginal cell more obtuse ; the pale hair of cheeks and 

 absence of black hair on scutellum. The mandibles are 

 black, with at most a faint reddish tinge at extreme apex. 



Hab. "West Point, Nebraska, 5 ? , at flowers of Bidens, 

 Sept. 19-2.2, 1903 (•/. C. Crawford). U.S. National 

 Museum. 



Megachile mendica, Cresson. 



A male from East Florida in the British Museum, from 

 the F. Smith collection, carries a manuscript name by 

 Smith, who doubtless had the species long before it was 

 published by Cresson. From the same source is also a male 

 M. petulans, Cresson, from E. Florida. 



Chelynia pavonina, Cockerel!. 



? . — Near Jinitown, Colorado, June 8, 1914 {TV. P. 

 Cockerell). The mesothorax is golden-green, with slight 

 coppery tints, and the scutellum is bluish green. 



