ENDOPARASITES OF DOMESTIC PIGEON.— JOHNSTON. 



173 



The male spicules are approximately equal in length (1-50 to 1-61 mm.) though 

 one often apiJears to be rather longer than the other. The sucker is provided with 

 a chitinous ring and measures from -IS to -20 mm. in diameter. On each side of the 



Fig. 7. — Tail of female — Ride view, o., anus ; r., rectum. 



Fig, 8, — Tail of a male — ventral view. 



Fig, 9. — -Tail ot another male — side view. «., suckfr. 



male tail is a small ala. The arrangement of the papillae is somewhat variable. The 

 presence of four large ones on each side between the anus and the midregion of the 

 sucker appear.'* to be characteristic. In front of these there are two smaller pairs. 



