108 NYSSONID&. 
their nervures testaceous; the legs with the coxee and femorz 
black, the tibize and tarsi ferruginous, their pulvilli piceous, and 
the knees of the tibize frequently pale yellow or fulvous, which 
in the anterior pair extends sometimes in a line down their front; 
the anterior tarsi ciliated, and the intermediate and posterior 
tibie with a triple row of spines. 
The abdomen very delicately punctured and shining ; the first 
segment with an ovate spot, the two following with a transverse 
line on each side, and the following two with a band, generally 
interrupted, of a lacteous colour, frequently obsolete in the last 
two segments, and sometimes, but rarely, the white markings are 
entirely deficient in all but the two or three first segments ?. 
The ¢ differs in having more of the silvery pubescence on the 
face; the tegule with generally a white spot in front; the legs 
with more of the yellow at the knees, the intermediate tibiz 
frequently marked with yellow on the exterior, and the posterior 
tibiz with a large brown or black splash on the outside; and 
the abdomen with seldom more than the two first segments 
marked with white, but is sometimes entirely deficient, leaving 
it quite black. 
In most Cabinets. 
+14 This insect is always found where sand abounds; 
its prey consists of Diptera, which it has a peculiar mode 
of carrying by the hind legs the while it either opens the 
aperture of its burrow or else forms a new one with its 
anterior pair. Its flight is low, and in skips; it is very 
active. 
Sp. 2. Ferox. N. Sp. 
niger, argenteo-sericeus, abdomine flavo maculato, pedibus flavis, 
mucrone metathoracis acutlo &. 
length 44 lines. 
Black: head very pubescent and punctured ; the whole face 
and cheeks covered with a dense silvery down. 
