Robertson — New or Little Known North American Bees. 53 



cence like that of thorax above, second segment with narrow 

 basal and median fasciae of pale appressed pubescence, third 

 with a broad basal fascia, fourth with a broad band with a 

 subtriangular notch posteriorly on the disc, pubescence be- 

 neath black ; wings subhyaline, apical margins clouded, 

 nervures dull ferruginous. Length 12-13 mm. 



$. — Head, thorax and legs without black or fuscous hairs ; 

 thorax above, and usually the vertex, fulvo-ochraceous, below 

 paler, but the legs sometimes with pubescence fulvo-ochra- 

 ceous ; clypeus, labrum and base of mandibles yellow; anten- 

 nae beneath fulvous, third joint hardly longer than second, 

 fourth joint nearly as long as next two together; abdomen 

 with fasciae, resembling those of female, the last three seg- 

 ments with black pubescence, beneath the segments have 

 black or fuscous pubescence, pale laterally ; tarsi ferruginous * 

 Length 11-13 ram. 



Carlinville, Illinois: 11 $; 44 ^ specimens. 



The male suggests M. compta on account of the black tip 

 of abdomen. 



MELISSODES AMERICANA Lep. 



Macrocera americana Lepeletier, Hist. Ins. Hym. 2: 92. tf. 1841. 

 Melissodes dentiventris Robertson, Trans. Acad. Sci. St. Louis, 7 : 353. 

 C?$. 1897. 



Since I described the female I have found male specimens 

 which agree quite closely with Lepeletier's description of M. 

 americana . 



Melissodes condigna Cr. 



Melissodes condigna Cresson, Proc. Acad. Sci. Phil. 1878: 207. £. 

 Melissodes palustris Robertson Am. Nat. 26: 273. tf. 1892. 

 Carlinville, Illinois, 6 5, 24 $ specimens. 



Melissodes snowii Cr. 



Melissodes snowii Cresson, Proc. Acad. Nat. Sci. Phil. 1878: 211. J>. 



M. nivea Rob. is probably the same, but the second sub- 

 marginal cell is more than half the length of first, and some- 

 times quite equal to it. 



