360 Mr. F. Smith on the Genus Centris. 



*11. Centris discolor. 



Female. Length 11 Hnes. Black ; the thorax clothed with 

 fulvous pubescence above, beneath and on the legs it is black ; 

 the wings dark fuscous, with a violet iridescence ; the abdomen 

 has the sides of the second segment, and the third, fourth, and 

 jfifth segments with a grey sericeous pile. 



Hab. Catagallo (Brazil). 



12. Centris rubella. 



Cetitris rubella, Smith, Cat. Hym. Ins, Apidce, ii. p. 372, $ , 

 Hab. Brazil (Tapajos) ; Archidona ; Napo. 

 Specimens from the latter localities have the clypeus yellow 

 anteriorly, as well as the labrum. 



13. Centris obsoleta. 

 Centris obsoleta, St.-Farg. Hym. ii. p. 163, $ . 

 Hab. Cayenne ; Tapajos. 



14. Centris violacea. 

 Centris violacea, St.-Farg. Hym. ii. p. 151, $ . 

 Hab. Brazil. 



15. Centris nobilis. 



Centris nohilis, Westw. Nat. Libr. xxxviii. p. 263, tab. xx. fig. 1. 

 C. analis, St.-Farg. Hym. ii. p. 152. 



Hab. Peru (Tabatinga) ; Brazil (St. Paulo). 



16. Centris ephippium. 

 Centris ephippium, Smith, Cat. Hym. Ins. Apida, ii. p. 378, d . 

 Hab. Venezuela. 



17. Centris modesta. 

 Centris modesta, Smith, Cat. Hym, Ins. ApidcB, ii. p. 371, c?» 

 Hab. Santarem (Brazil). 



*18. Centris melanchloina. 



Male. Length 10 lines. Black, clothed with black pubes- 

 cence ; the apical margin of the third segment of the abdomen 

 laterally with a narrow fascia of cinereous pubescence, a 

 broader fascia on the margin of the fourth segment inclining 

 to ferruginous, and the two apical segments covered with 

 ferruginous pubescence ; the clypeus and labrum yellowish 

 white, the former has two minute black dots at its base ; the 



