468 Messrs Cooper and Robinson, 
bicalcarate, bossed on dorsal surface ; pads small, claws relatively 
long. 
Female unknown. 
Fig. 21. Aponomma simplex 3 . Capitulum, ventral aspect. 
Origin. Description based on one collected by W. F. Cooper 
at Quambone, New South Wales, Australia. Host, Iguana, species 
not given. 
Note. Associated with Aponomma Gervaisi from which it differs more 
particularly in the dentition of the hypostome, the dentition of A. Gervaisi 
being 3 1 3. 
Aponomma quadratum sp. n. 
Figures 22 — 24. 
Male, L. 2'6 mm., W. 2*8 mm. Body (Fig. 22) somewhat 
quadriform, wider behind than in front, broader than long. 
Scutum glabrous, punctate ; dark-brown in centre, reddish-brown 
near margins; no metallic spots; punctations irregular, few coarse, 
many fine ; cervical grooves short, deep, wide, straight and 
parallel ; marginal grooves very indistinct ; festoons Avell-marked, 
small, broader than long ; nine shallow symmetrically disposed 
depressions on posterior half of scutum. Venter pale greyish- 
yellow, scattered with numerous whitish-hairs ; genital orifice 
between coxae II.; spiracles (Fig. 23) large, ear-shaped, with 
short tail running round to dorsum. Capitulum (Fig. 22), l. 
