ART. 13. DERMANYSSID MITES OF NORTH AMERICA—-EWING., 5 
Lepronyssus included several species, but the present writer can 
not at this time find any one of these that could stand as a type for 
a good genus. Since Kolenati’s material was so widely distributed 
it would appear that in the future a study of this material would 
enable some one to preserve the genus. Any hasty selection of a type 
species in this genus would almost surely bury it permanently in 
synonymy. 
Steatonyssus is evidently based largely on immature individuals, as 
both Kolenati’s generic diagnosis and figures indicate. Of his four 
drawings two certainly are of nymphs and the remaining two probably 
of nymphs. 
Pimelonyssus, the last of Kolenati’s genera, is likewise based on 
characters of immature individuals. 
DESCRIPTIONS OF GENERA HERE RECOGNIZED. 
ENTONYSSUS, new genus. 
Chelicerae with fixed arm harpoonlike, being sharply pointed and 
with a single, recured distal hook, and with the moveable arm falci- 
form; hypostome without re- ie 
curved hooks. Palpi moder- SF @xeegee 
ate, filiform. Legs all similar ee 
and each tarsus provided with Fic. 1—ENTONYSSUS HALLI, NEW SPECIES, VENTRO- 
a pulvillus and two equal INTERNAL VIEW OF CHELICERA. 
claws. The tarsal claws are 
very stout and strongly curved near their bases, but slender, straight, 
and sharply pointed distally. 
Type species.—Entonyssus halli, new species. 
The mouth parts in Entonyssus are so different from those of 
the other Dermanyssidae that a new subfamily should be created 
for it. This has been done, the subfamily Entonyssinae having 
been given in the key to 
genera. 
“) Cae y a 
~~) xopoRHYNCHUS, new genus. 
Fic. 2.—IXODORHYNCHUS LIPONYSSOIDES, NEW SPECIES. Chelicerae each with but a 
SIDE VIEW OF CHELICERA. e a : 
single arm, which is _ pro- 
vided with recurved hooks; hypostome large, divided and provided 
with a pair of recurved processes or hooks. Dorsal shield divided, 
the two parts completely covering the body above. Legs short, 
stout, spined. 
Type species.—Ixodorhynchus liponyssoides, new species. 
The relationships of this genus have already been discussed. 
