EXTERNAL PARASITES 



67 



Lipeurus poli/tnipczius. — This is a long, slender louse, with two 

 or three bristles extending from each segment of the abdomen. Its 

 head is well rounded in front and the thorax is rather broad and 

 long, 



LICE OF DUCKS 



Menopon ohscunim. — The head is crescent-shaped in front and the 

 abdomen has dark, lateral bands. It is dark fawn colored. 



Lipeurus squalidus. — The head is narrow and somewhat elongated 

 in front. There are six hairs on the front part of the head. This 

 louse is common in some localities. 



Fig. 21. Goniocotes 

 hologaster. 



A, mouth piirts; T?, an- 

 tennas; c, liooklets on free 

 extremitv v)f les. 



Fig. 22. Lipeurcs 

 Infuscatus. 



A, mouth parts; B, 

 abdomen; drawins: to 

 right of head ir.dicatcs 

 actual size. 



Fig. 23. Goxiodes 

 Stylifer. 



A, mouth parts; B, an- 

 tennpe (feelers); C, lees; 

 drawing to right ot head 

 indicates actual size. 



LICE OF GEESE 



Lipeurus jejunus. — A slender, pale, yellowish-white louse. It is 

 probably universally distributed. 



Trinoton continuum. — This is a fairly large louse, covered with 

 few hairs. It is common on geese. 



LICE OF PIGEONS 



Lipeurus haculus. — This is the common louse of the pigeon. It is 

 long, slender, light-colored and the abdominal segments are pro- 

 vided with two or three hairs on each side. Fig. 24 illustrates this 

 parasite. 



THE GRAY CANARY LOUSE 



This insect is provided with a slender, elongated body and 

 a large head, provided with strong jaws. It lives upon the 

 feathers of the bird. It does not suck blood. Its sharp claws 

 irritate the skin and cause discomfort to the bird. The eggs 

 of the gray louse are cemented to the feathers and are easily 

 removed. 



