118 



FEATHER-LICE INFESTING CHICKENS. 



sunlight could reach every nook and corner, all sorts of 

 parasites would become scarce. 



FEATHER-LICE INFESTING CHICKENS. 



( Goniocotes hologaster Nitzsch). 



This very common and troublesome parasite, the female 

 of which is shown in fig. 90 and the male in fig. 91, is only 

 about 1mm. in length. It has a nearly square head; its ab- 



Fig. 90. — Bitingf-louse of the 

 chicken, female. Greatly enlarged. 

 Original. 



Fig. 91. — Biting-louse of the 

 chicken, male. Greatly enlarged. 

 Original. 



domen is not very conspicuously marked, and the incurved 

 margins of the segments do not extend very much upon the 

 dorsal surface, as is the case in many other species, and 

 which produce the very distinct lines and borders seen there. 



Goniocotes ahdomlnalis Piaget. 

 This ver^^ conspicuous parasite is also fairly common 

 and decidedly troublesome. It is much larger, measuring 

 about 3mm. in length. The head is almost circular in 

 front, constricted behind; the thorax is small. Head, 

 thorax and legs are yellowish, marked with dark margins 

 and spots. The segments of the abdomen, are marked 

 with white fasciee with black borders, as shown in the 

 illustration, fig. 92. 



