ART. 13. DERMANYSSID MITES OF NORTH AMERICA—-EWING. 7 
Genus INCHORONYSSUS Kolenati. 
Chelicerae as in Liponyssus. Body stout with shoulder regions 
well marked, abdomen not squarish behind; dorsal shield entire; legs 
stout, tibiae I and II CROs Rene 
never as much as one SO fay Lapa 
and a half times as long 
as broad, femur I and 
II spined above. 
Type species.—Here 
designated as /choro- 
nyssus scutatus Kole- < 
| 
nyssus semitectus (L. \ 
Koch); ZL. spinosus Ou- 
demans; L. arcuatus Fic. 4.—ICHORONYSSUS CARNIFEX (C, L. KocH.) STERNAL 
(C. L. Koch); L. carni- pruatio Ons ¢ 
fex (C. L. Koch); ZL. tsabellinus Oudemans; L. albatus (C. Li. Koch) 
nati. 
Other species going 
(Berlese). It also includes L. sternalis, new species, described in 
this paper. 
in this genus are: Lipo- 
Genus LEIOGNATHUS Canestrini (s. st.). 
Chelicerae as in Liponyssus. Body not entirely covered above by 
dorsal shield or shields in either sex; legs not very stout, tibia I 
always more than one and a 
half times as long as broad, 
femora I and IT not usually 
spined above; in the case of 
the female the body is con- 
stricted suddenly and is 
provided with an incom- 
plete transverse groove be- 
hind the insertion of the 
last pair of legs. 
Type species. — Levogna- 
thus sylviarum (Canestrini 
and Fanzago). 
Besides the type, this 
Fic. 5.—STERNAL PLATE AND STERNAL REGION OF A LIPO- genus, in its res tri cte d 
NYSSUS SPECIES (L. BACOTI HIRST). 
sense, should include Lypo- 
nyssus erosbyi Ewing and L. constrictus, new species, which is de- 
scribed in this paper. 
Genus LIPONYSSUS Kolenati. 
Chelicerae with both arms present and shearlike. Body not en- 
tirely covered in either sex by dorsal shield; legs not very stout, 
