54 
Notes on Ticks 
long as 3. Hypostome spatulate, 2 ! 2, with 5-6 distinct teeth per 
external file. Venter: spiracle snb-triangular. Legs: coxae resembling 
those of $ ; tarsi tapering gradually, unarmed. 
Larva (Fig. 4) resembles the o. Body (unfed), L. 0'5-0'6 mni.h 
when gorged attaining 1’1-1'2 mm. Scutum broader than long {1. 0'3, 
w. 04 mm.), faintly emarginate; cervical grooves parallel. Capi~ 
tulum: 1. 0-2 mm., base sub-triangular, lateral angles and antero-lateral 
Fie. 4. Amblyomma darlingi L, dorsum, part of venter, tarsus 4. 
(G.H.F.N. del.) 
borders slightly rounded ; base, viewed ventrally, tvith rounded sides 
and flattened posterior border. Palps and hypostome resembling those 
of o. Legs: coxa I with two short divergent pointed spurs, the outer 
longer; coxae II-III with short blunt spur. Tar.si tapering gradually, 
unarmed. 
Described from 5 (f, 9 $, 40 o, and 23 larvae found on a deer 
{Odocoleus sp.), Corozal, Panama Canal Zone, 14. vill. 1910, by 
A. H. Jennings, of Ancon, and 2 o, found on the najje and head of a 
turkey buzzard (Catharista atratus). Empire, Canal Zone, iv. 1911, by 
S. T. Darling, M.D., Chief of Laboratoiy, Isthmian Canal Commission, 
Ancon, Canal Zone. Named in honour of Dr Darling in view of his 
distinguished services to parasitology. The types, for which I am 
indebted to Dr Darling, are in Cambridge (N. 128.5-1287). 
Before establishing this new species, of which, fortunately, all the 
stages were secured,! referred some of the specimens to Professor L. G. 
Newmann (Toulouse) and to my colleague, Mr L E. Robinson (Watford), 
^ The various measurements of nymphs and larvae were made on eight specimens 
chosen from amongst many because of the apparent differences they exhibited in point of 
size. The differences were, however, very slight or nil. 
