126 FEATHER-LICE INFESTING PIGEONS. 
thorax is narrow, the abdomen, in the male (fig. 103) 
broadest near the posterior end, in the female (fig. 104), 

Fig. 103.—Biting-louse of pigeon, male, posterior end. 
Greatly enlarged. Original. 

(eth e)| 
Py 
5 
Fig. 104.—Biting-louse of pig- Fig. 105.—Biting-louse of 
eon, female. Greatly enlarged. pigeon. Greatly enlarged. After 
Original. Nitzsch. 
more regular and broadest in the middle. The insect is 
whitish, with a brownish margin. It measures a little more 
than 1mm. in length. 
Goniodes damicornis Nitzsch. 
This species, about 2mm. long, and of a brownish color, 
has a head well rounded in front and strongly angular be- 
hind. It appears to be common upon pigeons. Fig. 105 
shows a male of this parasite. 
Goniodes minor Piaget. 
This species is also found upon the domestic pigeon. 
Lipuerus baculus Nitzsch. 
Almost every pigeon is infested with this peculiar insect. 
Its shape is very striking, and quite different from that of 
almost any other feather-louse, being extremely slender, al- 
