Gr. H. F. Nuttall 
409 
lateral borders; no lateral grooves; very fine, uniform punctations, 
except for a few lai’ger ones along the anterior and antero-lateral 
borders; a few very small, short hairs. Gapitidwn : base sub-rectangular, 
broader than long, with slightly concave raised and trenchant dorsal 
ridge continuous with the slight (trenchant) cornua; porose areas not 
depressed, large, ovoid, almost confluent. Palps short, far apart basally, 
converging and rounded distally, with thick internal border and broadly 
rounded tips, articulations between articles 2 and 3 obsolete; thumb-like 
Fig. 1. Ixodes calcdonicus ? : capitulum and scutum, capitulum in ventral aspect with 
coxae, anal groove, tarsus 4 and spiracle. F. M. H. del. 
in profile; ventral surface of basis capituli flattened, pentagonal, blunt 
auriculae protruding laterally; palpal article 1 with ventral angle ; hypo- 
stome inclined ventrally, rounded in front, dentition 2|2, with 8—9 blunt 
teeth per file, and a narrow unarmed median ridge. Venter: vulva slightly 
posterior to a line connecting the posterior borders of coxae II; genital 
grooves rounded in front, diverging slightly, then sub-parallel, finally 
diverging slightly to the posterior border; anal grooves rounding the 
anus anteriorly, then parallel, slightly divergent behind. Spiracle 
circular, macula median. Legs: coxa I visible dorsally, bidentate; 
with stout external spur and short internal spur; a stout external spur 
