HYMENOPTERA. 161 
AnoyLoscE.is, Lat.(1) 
In those, the mandibles are pluridentated on the inner side; the 
maxillary palpi, as in the preceding subgenus, consist of but four 
joints. 
_Cenrris, Fab. 
The species of this subgenus are only found in America(2). 
-_ 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. 
Epicuaris, Klug.—Centris, Fab. 
Where the last joints of the labial palpi are in the same direction 
as the preceding ones, are rather indistinct and form the point of 
those organs which resemble very elongated sete. The second and 
third cubital cells receive, each, a recurrent nervure(3). 
Acantuoprus, Kliig.—Xylocopa, 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. aif 
The internal extremity of the two posterior tibize presents two 
strong dentated spines(4). - 
The last of the Apiariz form communities composed of males and 
females, and a considerable number of neuters or labourers. In the in- 
ternal face of the posterior tibie—la palette—of these latter indivi- 
duals is a smooth depression—/a corbeille—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. 
(1) Insects brought from Brazil by M. de Saint-Hilaire. My genus Melitome, 
Fam. Nat. du Régn. Anim., originally formed with female Ancylcscelides, must be 
suppressed. That of the Tetrapedia, Kliig, perhaps re-enters the preceding one. 
(2) Lat., Ibid., 177. According to Messrs Lepeletier and Serville, the Ptilotopi,. 
Klig, are true Centres. 
(3) Lat., [bid., 178. 
(4) Lat., Ibid., 178. 
Vou. 1V.—V 
