152 INSECTA. 
there are three complete cubital cells, and the extremity of the an- 
tenne is curled in the males(1). 
RopuireEs, Spin. 
Where the mandibles are also dentated, but in which we find but 
two complete cubital cells; the antennz are not contorted in both 
sexes(2). 
PanurGus, Panz. 
Where the mandibles are not dentated. The stem of the antenne, 
from tke third joint, in the females, forms a sort of fusiform or elon- 
gated and almost cylindrical club, thinned at base. But two cubital 
cells in the superior wings(s). 
The mandibles of the females, in the others, are almost in the 
form of the bowl of a spoon, very obtuse, carinated or sulcated, and 
bidentated at the extremity. The labrum is extremely hard and 
ciliated superiorly. The antenne are strongly geniculate and fili- 
form. The superior wings have three complete cubital cells, the 
first intersected by a little transparent line, the second triangular, 
and the third the largest and receiving the two recurrent nervures. 
Xytocopa, Lat. Fab. 
Commonly called beilles perce-bois, Menuisieres, &c. The Xylo- 
cope are related in many points to the Megachiles, and more parti- 
cularly to the Osmiz. They resemble large Bombi. Their body 
is usually black, sometimes partially covered with a yellow down; 
the wings are frequently violet, cupreous or green, and brilliant. 
The male, in several species, differs considerably from the female. 
Their eyes are large and approximated superiorly. Their anterior 
legs are dilated and ciliated. 
X. violacea, L..; Reaum., Insect., VI, v, vi. About one inch 
in length; black, with violet-black wings; a russet ring round 
the antenne of the male. The female bores a long vertical hole 
in the body she has selected, usually old dry wood exposed to 
the sun, and parallel to its surface. It is divided into several 
(1) Lat., Gener. Crust. et Insect., IV, 156. 
(2) Lat., [bid., 161; and the Nouv. Dict. d’Hist. Nat. 2d edition. 
(3) Lat., Ibid., 157; and Encyc. Méthod., article Panurge. 
