270 
FOREIGN BEES. 
be reasonably entertained. This dissimilarity of 
the sexes is important to be noticed, on account 
of the difficulty of determining sueli exotic species of 
Xyloeopce as are closely related to each other. The 
propriety of giving Xylocopa Moris Fab. as a synonym 
of the female of the insect in question, or Apis Bra- 
silianorum as that of the male, as Mr. Guilding has 
done, is extremely questionable. Mr. Westwood, 
whose opinion is of so much value on a point of this 
kind, has scarcely a doubt that the Xylocopa Chrys- 
optera of Latreillc (Humboldt's South Amor. Zool. 
PI. XXXVIII. fig. 1,) is the female of X. Brasilian- 
orum. 
XYLOCOPA CORNIGER. 
Plate XXI. Fig. 3. 
This figure represents a very large, nondescript, and 
unique species of Xylocopa, from the collection of the 
Rev. F. W. Hope. Mr. Westwood, to wlio«< we are 
indebted for a beautiful drawing of it, proposes to 
name it X. Corniger, on account of two short strong 
horns upon the back part of the head, a character 
which does not occur in any other known species of 
the genus. 
It is entirely black and shining, the upper surface 
of the thorax and abdomen being entirely destitute of 
hairs. The front of the head is broad, and bears two 
oblique elevated shining ridges above the mouth, and 
between the posterior part of the eyes are two short 
thick horns. The abdomen is long and depressed, 
with fascicles of black hairs on the sides and extre- 
mity. The wings are black and very glossy, with a 
