314 
The Genus Ixodes 
Nymph (Fig. 15): Closely resembling the $. Scutum somewhat more 
elongate (the scutums of a Canadian specimen measured 0-7 x 0-56 mm., 
those of three Peruvian specimens measured 0-55 x 0-48, 0-53 x 0-4, 
0-51 x 0-48). Hypostome 3|3 followed by 2|2, about 10 teeth per 
external file. 
Larva (Fig. 16): Closely resembles the O but the scutum is short 
(0-35 x 0-36 mm.) and the hypostome 2|2 with 7 teeth per outer file. 
Geographical Distribution and Hosts : The species is widely 
distributed. The type ?s (4 specimens) were collected at Punta 
Arenas, Straits of Magellan, by Lebrun, from an undetermined bird; 
the 2 ?s in the British Museum were found on Trupialis militaris. 
Fig. 16. Ixodes auritulus Neumann 1904, larva (N. 3179). Scutum, capitulum in dorsal 
and ventral aspects, anus with anal grooves, coxae with trochanters, tarsus 3 
(G.H.F.N. del.). 
San Sebastian, Tierra del Fuego, x. 1906, by Crawshay. Our new 
specimens are (N. 2518) 1 ? from thrush, Oroya, Peru, 7. m. 1913, 
and (N. 2520) 1 ?, 3 os from pipit, Junin, Peru, 19. hi. 1913, both 
lots having been collected and presented by Mr C. H. T. Townsend. 
We have determined (Berlin 156) 1 $ from “Baumliuhn” (a bird 
described by collector as blueish with black neck), foot of Mt Turrialba, 
1600 m. elevation, 25 kilometres E. of Cartago, Costa Rica, C. America. 
Dr S. Hadwen has kindly sent us from Canada: (N. 3178) 1 $ from 
Haliaetus leucocephalus alascanus (Bald Eagle), 17. vi. 1910, and 1 O, 
1 L (10 larvae were comprised in the original lot) from Ctjanocitta 
stelleri carlottae (Queen Charlotte Jay), 23. vi. 1910, taken at Masset, 
