THE ACAEIXA OE MITES. 



123 



scarcely different. Professor Haller recorded one species, A. gracilepinnatus Haller 

 (fig. 257) from Canada. 



In Proctophyllodes the body is also slightly elongate, and the legs of subequal size. 

 The abdomen in the female is bifid at tip and with two stout bristles; in the male it 

 is scarcely bifid and provided with two prominent foliaceous appendages. P. reticuli- 

 fer Trouess. was taken on a California bird. 



In Rivoltasia (fig. 259) the species are rather short and broad, and all legs of about 

 ef[ual size; the male body is deeply bilobed at tip, each lobe provided with a very long 

 hair. They are very small species. Some occur on domestic fowls, and one is found on 



I 



Fig. 2ol.—Alloptes microphaethon and caroncle. 

 (Author's illustration.) 



Fig. 252.— Analges passeri- 

 nus: Female. (Author's 

 illustration.) 



pigeons. In Microlichus the species are similar to Rivoltasia, but the legs are shorter 

 and end in distinct claws, and there are two hook-like projections each side of the 

 rostrum near its tip. Alloptes (fig. 251) is similar to Proctophyllodes, and contains 

 many species occurring on tropical birds. 



In Ptcrolichus (fig. 249) the legs are all subequal in size. There is much variation 

 in the shape of the body, which in the male is bilobed at tip and in the female more 

 or less entire. It is a very large genus, and three species are known to occur in the 

 United States. P. aquilinu^ Trouessart has been taken on the golden and bald 

 eagles; P. buchholzi Canestilni on the god wit and golden plover; and P. longiventer 

 Megnin and Trouessart on the Itarred owl. 



The genus Falculifer (formerly Falciger) has few species, but one of them, F. 

 rostratus Buchholz, presents several interesting points. The adult stage differs but 

 little from the normal bird mite, except that there are two forms of the male — one 



