124 



FEATHER-LICE OF DUCKS. ETC. 



Its color is white and very transparent; it is ornamented 

 \vith a number of black spots. 



Trlnotum Jurldum Nitzsch. 

 Most of our ducks are more or less badly infested with 

 this large feather-louse, which measures 4 to 5mm. in length. 

 It is a well-marked species, as can be seen in the illustration 

 (fig. 100). 



Trlnotum conspurcatum Nitzsch. 

 This species is said to be found upon the goose and 

 swan. 



Trhiotuin lltiiratuni Nitzsch. 

 This peculiar animal is not uncommon upon the domes- 

 tic goose, but has also been repeatedly taken from Green 



Fig. 101. — Biting-louse of dncks, clc, and tarsus. Greatly enlarged. Original. 



Teals. It is white and almost transparent. The illustra- 



