Bobertson — North American Bees. 353 



of methathorax, sides of protborax extendinoj upon mesono- 

 tum, mediaD impressed line of mesonotum ; borders of scutel- 

 lar lobes and coxae with whitish scale-liiie pubescence ; abdomen 

 as long as head and thorax, the latter wider than head, scu- 

 t«llum bilobate ; mandibles, labrum, apex of clypeus, flagel- 

 lum, tubercles, tegulae, anterior tibiae and tarsi, knees, tips 

 of middle and hind tibiae, narrow edges of ventral segments 

 and the apical segment of abdomen ferruginous ; wings sub- 

 hyaline, apex clouded, nervures and stigma black ; marginal 

 cell about equaling submarginals together, rounded and 

 appendiculate at apex ; second submarginal cell about one- 

 third shorter than first, narrowing nearly two-thirds towards 

 marginal, the recurrent nervures uniting with the transverse 

 cubitals; abdomen black, apical margins of segments with 

 narrow fasciae, rufous passing into golden, first segment with 

 a lunate white patch on each side, 2—5 with four equidistant 

 subbasal white patches. Length 6 mm. 

 Carlinville, Illinois ; 1 ^ specimen. 



Synhalonia Pttn. 

 Synhalonia atkiventris Sm. 



Melissodes atriventris Smith, Brit. Mas. Cat. Hym. II, 310, c^, 1854.' 

 Melissodes nigripes Smith, Brit. Mas. Cat. Hym. II, 311, $ (aon (^), 



1854. 

 Melissodes dubUata Cresson, Proc. Acad. Sci. Phil. 1878, 194, $ (non (^). 

 Synhalonia atriventris Cresson, Synopsis, 305, cf $ (third line from top), 



1887. 



Carlinville, Illinois; 33 $, 8 <j specimens; Algonquin, 111. 

 (Nason), U. S. (Smith), Ga. (Cress.). 



The pubescence of legs, especially the scopa, varies from 

 fulvous through fuscous to black. I have examined the types 

 of M. dvhitata in Coll. Am. Ent. Soc. 



Melissodes Latr. 

 Melissodes dentiventris Sm. 



Melissodes dentiventris Smith, Brit. Mas. Cat. Hym. II, 312, (^, 1854. 



2' — Black, pubescence on head, thorax and basal segment 

 of abdomen above long and fulvous ; on the clypeus, labrum, 

 head beneath, some hairs on vertex and a few short ones on 

 disc of mesothorax and scutellum, thorax beneath, legs and 



