BITING-LOUSE OF SHEEP. 



Ill 



THE BITING-LOUSE OF THE CAT. 



* ( Tt'ich odecte^ suhrostratvs 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 (33^ its pointed 

 head. Below the front of the head is fotmd a deep furrow, 

 into which fits a hair of the host so closelj^ that it can not 

 be readily removed. Fig. 79 from Insect a Epizon shows this 

 parasite. 



THE BITING-LOUSE OF THE SHEEP. 



{TrlcJi(jdectes sphcerocephalus Nitzsch). 



This louse is distinguished by an almost circular, hairy, 

 and 3'ellow head, with darker margins in front of the feelers. 



Fig. 80. — Biting-louse ol 

 sheep, male; n, genital orifice. 

 Greatly enlarged. After Cur- 

 tice. 



No eyes are present, 

 which the former is 

 broader but shorter. 



Fig, 81. — Biting louse of sheep, female; a, head; 

 6, antennse; c.face; d, cheeks; e, e, dorsal sutures; 

 f, legs: g, prothorax; b, metathorax; i, abdomen; 

 k, dark traverse bands: /, line of hairs on each 

 segment; in. m, breathing pores; o, female genital 

 orifice; p, female claspers. Greatly enlarged. 

 After Curtice. 



The thorax shows two segments, of 



as broad as the head, the second one 



The elono^ated Yellowish abdomen 



