Mites and Lice on Poultry. 



19 



but on crippled or unthrifty turkeys they may cause serious annoyance 

 and undoubtedly they are mjurious to poults. 

 For remedial measures see pages 20-27. 



LICE ON GEESE AND DUCKS. 



While considerable numbers of lice are found on domestic geese 

 and ducks, they seldom become sufficiently numerous to cause 

 noticeable injury. One of these species ^ is quite common on ducks 

 throughout the country, and a variety of this same species is to 

 be found on the goose. A slender species ^ has been found by the 



Fig. 14.— Large turkey louse (Goniodes stylifer): 1, Male, top view; 2, tip of abdomen of female; S, antenna 

 of female. All greatly enlarged. (Herrick.) 



writers rather commonly on the duck in the vicmity of Dallas, Tex., 

 and in other parts of the United States. Another louse similar in 

 form, but which appears to be new to science, has been collected on 

 these hosts in Mississippi. Both of these species mhabit the wmg 

 feathers and are often very numerous at the base of the large feathers 

 of the wing. Young ducks which have been hatched by hens are 

 sometimes much annoyed by the head louse, which attacks them in 

 the same way as it does young chickens. 



The same control measures recommended for chicken lice will 

 destroy these insects on ducks and geese. 



Known scientifically as Docophorus icterodcs Nitzsch. 



' Lipeurus temporalis Nitzsch. 



