302 
The Genus Ixodes 
this is reproduced with other Marx figures in (Banks’) Ixodoidea of the 
United States, PL IX, fig. 7; the teeth are longer than he shows but 
hardly as acute as Banks’ figure on PI. IV, fig. 6. Marx’s figure of the 
shield, PL IX, fig. 3, is not broad enough behind.” In Marx’s figure 
reproduced by us in Ticks, the basis capituli appears short, the auriculae 
short and blunt, the hypostome 5|5; figure 154 of the coxae (also from 
Marx) show coxa 1 with a long slender spine. 
The ? and o of our specimens also resemble corresponding stages 
of 7. holiviensis Neumann, as will be seen by reference to Ticks, Part ii. 
Figs. 161, 162, but the latter differ in showing no ventral spine upon the 
first palpal article; coxa I in the $ bears a long spur; the o has small 
almost obsolete cornua, small auriculae and hypostome with dentition 
2|2, etc. 
All of these forms appear to me to be so closely related that they may 
with time be found to represent but varieties of one species, 7. fuscipes. 
Their geographical distribution also suggests this possibility. I.f usc ipes 
occurs in Brazil (on Dasyprocta agouti) and Panama (on Felis pardalis) ; 
7. holiviensis occurs in Bolivia (on Icticyon venations ); whilst 7. dentatus 
occurs in the United States (on rabbit). The variety here described 
occurs in Western Canada (on Lepus americanus and Sciurus hudsonius). 
Female (Fig. 6): Hard parts blackish brown, these and the body 
bearing long fine scattered hairs. ( Dorsal aspect ) Scutum : 1-4 x 1-02 
mm., oval, with pointed scapulae, cervical grooves distinct, not attaining 
the posterior border, rounded lateral ridges, fine punctations uniformly 
distributed in the median field. Capitulum with base subtriangular, 
slight rounded cornua, porose areas piriform with interval equal to their 
length. Palps long, somewhat pointed distally, broadest at the distal 
end of article 2 which is longer than 3, a slight dorsal concavity; ( Ventral 
aspect) palpal article 1 with ventrally protruding spine, auriculae large, 
curving inward and protruding ventrally (see figure); hypostome 
rounded distally, 3|3, about 10 teeth per outer file. Venter (semi- 
gorged specimen) with vulva between coxae III; anal grooves short, 
parallel, slightly ogival in front; spiracle ovoid. Legs : Coxa I with 
long pointed internal spine, a short external spur on all coxae, decreasing 
in size from coxa I to IV; tarsus 4 tapering obliquely, pad shorter than 
the claws. 
Nymph (Fig. 7): Resembling the ?. Scutum, relatively shorter, 
0-62 x 0-55 mm. Capitulum with cornua more marked and arising 
from lateral ridges; auriculae smaller; hypostome 3|3 followed by 212 
