Mr. F. Sniitli on the Genus Centris. 371 



abdomen ferruginoa.-'. Head : the clypeus, labrum, mandibles, 

 face on each side of the clypeus, and the scape in front yellow ; 

 two semicircular black spots on the clypeus ; the flagellum of 

 the antennae, except the two basal joints, obscurely ferruginous 

 beneath. Thorax clothed above with ochraceous pubescence, 

 on the sides and beneath it is paler ; the pubescence on the 

 legs is pale fulvous ; the posterior femora have a small tooth 

 near their base beneath ; wings subUyaline, their nervures 

 fuscous. Abdomen : the basal segment with pale ochraceous 

 pubescence, the three apical segments fringed at the sides with 

 fulvous pubescence. 

 Hah. Pemambuco. 



*80. Centris terminata. 



Male. Length oh lines. Black, with the terminal joints of 

 the tarsi rufo-piceous. Head : the clypeus, labrum, and 

 mandibles pale yellow, the latter have sometimes only a yellow 

 spot at the base ; the flagellum of the antenna, except the two 

 basal and two apical joints, rufo-testaceous beneath ; the pu- 

 bescence on the cheeks and a tuft between the antennae white ; 

 that on the vertex is dark fuscous. Thorax clothed above 

 with fulvous pubescence ; at the sides and also beneath it is 

 griseous ; the anterior and intermediate legs fringed behind 

 with pale pubescence, that on the posterior pair is black, some- 

 times mixed with brown or obscure fulvous ; Avings subhyaline, 

 the nervures brown. Abdomen with fulvous pubescence at 

 the base and white at the apex ; beneath thickly clothed with 

 griseous pubescence, occasionally mixed with fulvous at the 

 apex. 



Hah. Para 5 Santarem ; Catagallo (Brazil). 



This is a variable insect in the coloration of its pubescence. 

 Specimens from Catagallo have bright fulvous pubescence on 

 the thorax ; those from Para have it pale fidvous ; the legs 

 are black in the specimens from Catagallo, Avhilst in those from 

 Para and Santarem they are usually more or less rufo-piceous. 



*81. Centris tarsata. 



Male. Length 4|- lines. Head and thorax black, legs and 

 abdomen ferruginous. Head : the clypeus, labrum, and man- 

 dibles yellowish white, the tips of the latter ferruginous ; the 

 pubescence on the cheeks white, on the face and vertex it is 

 yellowish, the latter has a mixture of fuscous ; the flagellum 

 of the antenna}, except the two apical and two basal joints, 

 rufo-testaceous. Thorax clothed above with yellow pubescence, 

 on the sides, beneath, and on the legs it is paler; the posterior 



