298 E. T. CRESSON. 



two beneath, the latter the longer), middle of the segment deeply ex- 

 cavated; otherwise as in $ . Length 5 lines. 



One specimen. (Coll. Dr. J. Gundlach, No. 99.) 

 Melissodes mimicus, n. sp. 



% . — Black ; head, thorax and base of abdomen clothed with a dense 

 ochraceous pubescence, mixed with black on disk of mesothorax ; cly- 

 peus white ; antennae as long as body, undulate, flagellum fiisco-ferru- 

 giuous beneath; wings hyaline, faintly dusky at tips, nervures brown; 

 legs piceous-black, anterior pair with ochraceous, the two posterior pair 

 with fulvous pubescence, tips of tarsi pale fulvous; abdomen piceous- 

 black, shining, palish at apical margin of segments, base of first seg- 

 ment with long, rather dense, ochraceous pubescence, a fascia of same 

 color on disk of second, third and fourth segments, oblique and subin- 

 terrupted on second ; remainder of abdomen with very short black pu- 

 bescence. Length 4 lines. 



Three specimens. (Coll. Am. Ent. Soc.) Smaller than Lanterii, 



and with pubescence of abdomen differently arranged. 



Exomalopsis similis. 



Exomalopfiis similis, Cresson, Proc. Ent. Soc. Phil, iv, p. 191, 9- 



The % differs from the 9 only by the smaller size, narrower face, 

 which is densely clothed with whitish pubescence, as well as the cheeks ; 

 the scutellum has long, erect, brown pubescence; legs clothed with 

 whitish pubescence, mixed with brown on posterior pair; abdomen 

 more convex. Length 3 lines. 



One specimen. (Coll. Dr. J. Gundlach.) 

 Centris armillatus, n. sp. 



% . — Deep black; eyes large, pale; face sparsely punctured, shining ; 

 vertex, occiput and cheeks clothed with short black pubescence ; flag- 

 ellum palish beneath ; thorax clothed with dense short, deep black pu- 

 bescence, a bread band of yellowish-white pubescence on the anterior 

 margin above; wings subhyaline, subviolaceous, uniformly tinged with 

 dusky, nervures black; legs black with black pubescence, the middle 

 femora and base of tibiae fringed behind with long black pubescence 

 and the posterior pair fringed on both sides with longer, dense black 

 pubescence, forming a flattened brush ; spurs of posterior tibiae being- 

 long and curved; tarsal claws long and deeply cleft, the inner tooth 

 much the shorter; at the base of the posterior pair a long tuft of pu- 

 bescence, projecting inwardly; abdomen short convex, nude, finely 

 punctured and shining above, the basal and apical segments and the 

 venter with rather thin black pubescence. Length 6 lines. 



One specimen. (Coll. Dr. J. Gundlach, No. 214.) 



