ki : DIPTERA. 109 
in the Essay, 1815, referred to the genus Cuterebra, while at the same 
time he described another form as horripilum. The adults of these 
two forms are so nearly alike that 
Brauer believes them to be the same, 
the cuniculi being described from a 
; slightly denuded specimen. Without 
b attempting to settle this question, we 
e may proceed on the supposition that 
Hi there is but one species and then 
' call attention to the specimens which 
: have exact correspondence with the 
q description of horripilum. 
The adult is a large fly, almost as 
large and having some resemblance 
to a bumblebee. The head is black, 
the thorax above covered with a 
yellow-brown hair, the first segment 
of the abdomen with yellow hair, and 
a * pe 
Fic. 52.—Cuterebra cuniculi: a, larva, ventral 
aspect; b, pupa, lateral view; ¢, anterior ex- 
the rest of the abdomen of a blue- tremity; d, hooks and anterior spiracles of 
black eolor. larva—all enlarged (original). 
The egg and early stages of larva are unknown, but the full-grown 
larva is a large, black, spiny creature, found under the skin of the 
rabbit, where it forms a large tumor. 
Fic. 53.—Cuterebra horripilum: adult—natural size (original). 
The Department records show these larvze to have been collected 
at Oracle and Florence, Arizona; Tuscola, Fla.; Savannah, Ga.; Riy- 
Fia. 54.—Outerebra larva, collected at Ames: a, ventral; }, lateral; c, dorsal aspect (original). 
erside, Cal., and Estes Park, Colo., while specimens from St. George, 
Fla., referred doubtfully to this species, were taken from the necks 
of rats. 
