art. 13. DERMANYSSID MITES OF NORTH AMERICA—EWING, 40 ff 
specimens of L. montanus on type slide. One record: ‘‘On S. h. rich- 
ardsoni, King coll., Dallas acc. 2467.” 
LIPONYSSUS CANADENSIS Banks. 
Female.—Medium-sized. Palpi reaching to about the tips of 
femora; chelicerae very slender and each arm slightly hooked at the 
tip. Dorsal shield large, sides irregularly convex, and not broadly 
and evenly rounded behind. Peritreme long and sinuous and extend- 
ing to opposite the first coxae. Sterna] plate over twice as broad as 
long and reaching only between the second coxae; anterior setae 
situated slightly behind anterior margin; middle setae situated 
almost on the lateral margins; posterior setae situated at apex of 
projecting posterior corners. Anal plate broadly and evenly rounded 
in front; anus almost circular and with thin, uniform rim; paired 
setae situated opposite middle of anus; median seta situated its 
length from the anus; caudal area rather small, crescentic and scobi- 
nate. Legs moderate; posterior pair extending beyond tip of abdo- 
men. Length, 0.52 mm.; width, 0.28 mm. 
Male.—The writer has never observed the male of this species. 
According to Banks, the body of the male is nearly twice as long as 
broad. This is the only statement relative to the male characters in 
his description. It might be inferred, therefore, that the two sexes 
are much alike except for those characters that are commonly recog- 
nized in the sexual dimorphism found in the family. 
Type locality.—Guelph, Ontario. 
Type.—No published selection of type. 
This description based on two United States National Museum 
lots; one consisting of 13 specimens taken from a chicken, at Fram- 
ingham Center, Massachusetts; the other of 13 specimens taken from 
nest of purple grackle, Long Bridge, Alexandria County, Virginia, 
by Shannon. Other North American records are, on English spar- 
tow, red-eyed vireo, meadow lark, and kingbird, Guelph, Ontario. 
LIPONYSSUS MONTANUS, new species. 
Female.—Large, and similar to females of Haemogamasus. Palpi 
large; chelicerae shearlike but the hooked tips of both arms rather 
blunt and suggesting the toothed arms of Haemogamasus. Dorsal 
shield medium, lateral margins behind shoulders very slightly convex. 
Peritreme long, sinuous, and extending to opposite coxae I. Sternal 
plate of female with posterior corners broadly rounded and not ex- 
tended. Anal plate very large, broadly rounded in front and some- 
what truncate behind; anus subcireular, with uniform rim and situ- 
ated almost centrally; paired setae situated far forward, being at the 
level of the anterior margin of the anus; median seta situated about 
its length behind the anus; caudal area crescentic, scobinate. Legs 
