BITING-LOUSE OF SHEEP. 111 
THE BITING-LOUSE OF THE CAT. 
(Trichodectes subrostratus Nitzsch). 
Our domesticated cat is sometimes infested with these 
parasites. The insect is 1.2mm. long and is distinguished 
from species found upon other mammals by its pointed 
head. Below the front of the head is found a deep furrow, 
into which fits a hair of the host so closely that it can not 
be readily removed. Fig. 79 from /nsecta Epizoa shows this 
parasite. 
THE BITING-LOUSE OF THE SHEEP. 
( Trichodectes sphwrocephalus Nitzsch). 
This louse is distinguished by an almost circular, hairy, 
and yellow head, with darker margins in front of the feelers. 




q 
Diy? 
SA? 
“ANd = 3 
: asi 
PALL AT TREN 
ee Css 
PUPP ATE Gy 

Fig. 80. — Biting-louse of Fig, 81.—Biting louse of sheep, female; a, head; 
b, antenne; c,face; d, cheeks; e,e, dorsal sutures; 
sheep, male; n, genital orifice. f, legs; g, prothorax; h, metathorax; j, abdomen; 
k, dark traverse bands: J, line of hairs on each 
Greatly enlarged. After Cur- segment; m.m, breathing pores; o, female genital 
orifice; p, female claspers. Greatly enlarged. 
tice: After Curtice. 
No eyes are present. The thorax shows two segments, of 
which the former is as broad as the head, the second one 
broader but shorter. The elongated yellowish abdomen 
