368 Mr. F. Smith on the Genus Centris. 



spot on each side of the clypeus at its base ; its anterior mar- 

 gin narrowly rufo-piceous, the middle of the margin with an 

 angulated black shape ; the inner orbits of the eyes, as high 

 as the insertion of the antennee, yellow. The thorax clothed 

 above with short yellowish-grey pubescence, pale yellow at 

 the sides and whitish beneath ; the legs feniiginous ; the pu- 

 bescence on the posterior tibijB and basal joint of the tarsi 

 pale fulvous ; the inner side of the tarsal joint clothed with 

 blackish pubescence ; wings subhyaline, the nervures fusco- 

 ferruginous. Abdomen : the basal segment with short pale 

 yellowish pubescence ; the apical margins of the two following 

 segments rufo-piceous 5 beneath ferruginous ; two lunate black 

 spots at the base of the third and fourth segments ; the second 

 and two following segments have their apical margins fringed 

 with pale pubescence. 

 Hob. San Domingo. 



*68. Centris apiformis. 



Length 7 lines. Head and thorax black, abdomen nigro- 

 seneous. Head : labrum, clypeus, mandibles, and scape of 

 the antennae in front yellow ; the clypeus with a broad black 

 line on each side, and the mandibles with their inferior mar- 

 gins rufo-piceous ; the flagellum, except the two basal joints, 

 rufo-testaceous beneath ; the cheeks with white pubescence, a 

 tuft of the same between the antenna?, and another on the ver- 

 tex, both usually more or less tinged with fulvous. Thorax 

 clothed above with fulvous pubescence ; on the »sides, meta- 

 thorax posteriorly, and beneath it is very pale fulvous ; the 

 legs rufo-piceous, the femora darkest ; the anterior and inter- 

 mediate tibiaj with a paler line outside ; the base of the poste- 

 rior pair also pale yellow ; all the tibiee and tarsi fringed 

 behind with pale fulvous pubescence ; wings subhyaline, 

 Abdomen : a transverse nigro-?eneous fascia on the second and 

 third segments, and the basal margin of the fourth of the 

 same colour; tlie apical segment rufo-testaceous, as well as 

 the apical margins of the third and fourth segments, which are 

 also thickly fringed with fulvous pubescence. 



Hah. Santarem (Brazil). 



*69. Centris nitida. 



Female. Length 6^ lines. Black ; the abdomen very smooth 

 and shining ; the thorax clothed above with pale yellow pu- 

 bescence. Head : the mandibles and labrum yellow ; an in- 

 terrupted arched transverse band on the clypeus, and a line at 

 the inner orbits of the eyes, which does not extend above the 

 insertion of the antenna3, yellow ; the flagellum of the antennse 



