266 INSECTA. 
Cenrris, Fab : 
The species of ‘this subgenus are only found in America *. 
Sometimes the maxillary palpi have but a single and very small 
joint, which in some even becomes invisible. The paraglosse are 
very short, and the mandibles dentated. 
Eprcnaris, A tig —Crntris, Fab., 
Where the last joints of the labial palpi are in the same direction as 
the preceding ones, but rather indistinct and form the point of those 
organs which resemble very elongated setae. The second and third 
cubital cells receive, each, a recurrent nervure f. 
Acantuopus, &f liig,—Xyiocops, Fab., . 
Where the two last joints of the labial palpi form a small, oblique, 
and lateral stem; the third cubital cell receives the two recurrent 
nervures. 
The internal extremity of the two posterior tibiz presents two 
strong dentated spines f. 
The last of the Apiariz form communities composed of ma/es and 
females, and a considerable number of neuters or labourers. In the 
internal face of the posterior tibie—/a palette—of these latter indi- 
viduals is a smooth depression—/a corbei/le—in which they place the 
pellet of pollen collected with the silken down or brush attached to 
the inner side of the first joint of the tarsi—la piéce carée—of the 
same leg. The maxillary palpi are very small and formed of a single 
joint. The antenne are geniculate. 
Sometimes the posterior tibize are terminated by two spines, as in 
Eveuossa, Lat. Fab., 
Where the labrum is square, and the pseudo-proboscis is as long as 
the body; the labial palpi terminate in a point §, formed by the two 
last joints. 
Bomeus, Lat. Fab., 
Where the labrum is transversal, the pseudo-proboscis is much 
shorter than the body, and the second joint of the labial palpi termi- 
nates ina point, bearing the two others on its outer side. 
The vulgar name of these Insects, or Bourdons, is applied (in 
France) to the males of the domestic Bee, but the Insects of which 
We are now speaking are much larger, more rounded, and covered 
with hairs frequently arranged in variously coloured bands. They 
* Lat., Ibid., 177. According to MM. Lepeletier and Serville, the Ptilotopi, 
Kliig, are true Centres. 
+ Lat., Ibid., 178. 
+ Lat., Ibid., 178. 
§ Even in those species where the body is almost glabrous, such as the dentata, 
cordata, &c., the posterior face of the first joint of the two last tarsi is still furnished 
with a brush. The habits of these Insects are unknown to us. Some individuals 
differ from others by the anterior convexity or thickening of their posterior tibie, 
where we also remark. near the outer margin, a cleft or narrow and longitudinal 
fossula. The genus AGLA® of Lepeletier and Serville—-Encye. Méthod., Insect., 
X, 105—appears to have been established on similar indiyiduals. See Lat,, Ibid. 
These Apiariz are peculiar to South America, 
