322 
The Genus Ixodes 
Male: Scutum 3 mm. long, deeply emarginate, tapering to a rounded 
point behind. Capitulum resembling that of the $ in structure but 
differing in shape (as is usual in males of this genus), being small, with 
long narrow base; very broad palps widening and rounded distally, 
article 1 resembling that of the $; hypostome 2|2, shaped as in the $. 
Legs : Coxae, and apparently the tarsi, as in the $. 
Female (Fig. 20 a) : When unfed, the body measures 3 x 1-8 mm., 
it is ovoid, broadest on a level with coxae IV, the marginal fold almost 
complete. (Gorged specimens attain 10 x 7 mm.) Capitulum and 
scutum light chestnut brown, legs paler. ( Dorsal aspect) Scutum about 
as long as broad, 1-4 x 1-54 mm., with moderate emargination, sides 
straight and divergent, lateral angles far back and rounded, posterior 
border slightly sinuous; cervical grooves distinct, straight, slightly 
divergent, not attaining the posterior borders, no lateral ridges, moderate 
punctations or confluent punctations uniformly distributed and giving 
a rugose appearance, no hairs. Capitulum peculiar , base very short, 
pentagonal, with antero-lateral margins long, cornua absent; porose 
areas depressed, of irregular form, their long axes oblique, the interval 
hollowed and exceeding their width (less than their width in the type). 
Palps far apart, with article 1 extraordinarily developed, protruding 
like a cuff about the shaft of the chelicera and closely articulated with 
the basis capituli, with a protruding external process situate vent-rally 
but seen dorsally; articles 2-3 fused, club-shaped, narrow behind, 
broadly rounded in front; ( Ventral aspect) basis capituli with sides 
parallel, palpal article 1 with protruding flange internally; hypostome 
broad distally 4|4, then 3|3, very narrow posteriorly, with numerous 
very fine teeth 313 basally. Venter : Vulva between coxae IV; anal 
grooves broadly rounded in front, curving towards each other behind 
and diverging where they approach each other and indent the posterior 
border; spiracle ovoid, small, with long axis transverse, macula eccen¬ 
tric. Legs : Coxae large, unarmed, flanged; trochanters unarmed; 
tarsi tapering stepwise, pad almost as long as the claws. 
Nymph: Scutum short, as in the $. Capitulum recalling that of the 
?; hypostome 3 j 3 distally, mostly 212, narrowing posteriorly in the same 
characteristic manner as in the $, and also with teeth dwindling in size 
toward the base; palpal article 1, seen ventrally, projects well 
outward as a recurved pointed flange. Legs: coxae and tarsi as 
in the $. 
Larva: Recalls the nymph: Scutum short. Hypostome rounded 
distally, 2|2, there being 7 strong teeth per outer file. 
