AGLAE CAERULEA. 263 



AGLAE CAERULEA. 

 PLATE XIX. Fig. 3. 



Agla caerulea, Encyclop. Methodique Griffiths Cuvier^ In- 



secta, vol. ii. PL 107. 



THIS group, peculiar, like the former, to South 

 America, was separated from Euglossa by M.M. 

 Lepeletier and Serville. The antennee are long and 

 filiform, inserted in a frontal cavity, consisting of 

 twelve joints in the female and thirteen in the male ; 

 labial palpi four-jointed ; ocelli three ; scutellum. 

 depressed, the sides prolonged behind into two spini 

 form projections. The species are probably parasi- 

 tical, for they are destitute of the apparatus requisite 

 for collecting pollen. The species represented may 

 be regarded as the type. It is a large insect com- 

 pared with the generality of its associates, of a violet 

 blue colour, very glossy, and covered, though not 

 very thickly, with black hairs ; antennae black ; sides 

 of the abdomen, which bear tufts of hair, brownish ; 

 wings likewise of that colour with a slight golden 

 reflection ; labrum and scutellum very glossy. 

 It is a native of Cayenne. 



CENTRIS NOBIL1S. 



PLATE XX. Fig. 1. 



CENTRIS has the antennae filiform in both sexes, of 

 twelve joints in the female and thirteen in the male ; 

 the third joint always slender throughout its whole 

 length but suddenly enlarged at the tip ; mandibles 

 with four teeth on the inner edge ; maxillary palpi 



