304 
The Genus Ixodes 
with 9 teeth per outer file; palpal article 1 with small ventral protrusion. 
Legs as in the $ but tarsi shorter. 
Larva (Fig. 8): Somewhat resembling the o. Scutum as broad 
as long (0-3-0-32 x 0-33 mm.), without lateral ridges, but slightly 
emarginate. Capitulum base very short, antero-lateral borders widely 
diverging, sharp postero-lateral angles with faint indication of cornua; 
slight auriculae; hypostome 313 with about 7 teeth per outer file; 
palpal article 1 with ventral angle. Legs recalling those of the o but 
coxa III unarmed. 
Fig. 8. Ixodes dentatus var. spinipalpis n. var., larva (N. 3181). Scutum, capitulum 
in dorsal and ventral aspects, coxae with trochanters, anus with anal grooves 
tarsus 3 (G.H.F.N. del.). 
My description is based on (N. 3180) 1 $ found on Lepus americanus, 
1. ix. 1910, (N. 3181) 3 o found on L. americanus , Sciurus hudsonius 
douglasii and upon a child respectively, besides 4 larvae (17 were 
originally collected) from Lepus americanus , 5. m. 1910, all taken at 
Mount Lehman, British Columbia, Canada, by Dr S. Hadwen. 
Types in Cambridge. 
