APPENDIX. 351 



Length more than one-fifth of an inch. 



9 Hypostoma with three, longitudinal, yellow spots, of 

 which the intermediate one is longest ; orbits on the ante- 

 rior inferior portion with a triangular yellow spot ; anten- 

 nse, basal joint entirely black ; spots of the tergum less 

 elongated than those of the male, and the feet have more 

 of the black colour. 



Length rather over one-fourth of an inch. 



MEGACHILE, Latr. 



1. M. intemipta. Thorax surrounded by ferruginous ; 

 tergum five-banded. 



Inhabits Missouri. 



% Body punctured, above glabrous ; head black ; an- 

 tennae, first joint at base and third and fourth joints dull 

 rufous ; hypostoma, broad frontal orbits, and mandibles 

 at base, yellow ; vertex with a ferruginous band, interrupt- 

 ed in the middle and extending down the cheeks; labrum^ 

 rufous, a small black spot at base ; thorax black, surround- 

 ed by a ferruginous margin, which is interrupted before, 

 and passes upon the posterior margin of the scutel ; wings 

 fuliginous ;/?/er«/'a with cinereous hair beneath the wings; 

 feet rufous, tarsi with yellow hair ; tergum convex, black, 

 with dilated, obscure, rufous, scarcely definite bands, five 

 in number, on each of w^hich, excepting the basal one, is 

 another yellow band emarginate each side behind, and the 

 three posterior ones are interrupted in the middle ; anus 

 trilobated; lobes yellow, intermediate one sxa^W ', posterior 

 coxse each with a robust yellow spine ; venter with trans- 

 verse bands of long, dense, yellow hair. 



Length nearly two-fifths of an inch. 



9 The black colour of tho front extends down upon the 



