1963] 
Darlington — Tachys 
3i 
which is conspicuously foveate in convexus, finely punctulate in con- 
vex, ulus. The two species are, I think, closely related but apparently 
distinct. The present new species seems to occur only in a very limited 
area, near but not quite on the tip of the Cape York Peninsula. It is 
within the range of convexus , which occurs at Lockerbie still farther 
north, almost on the actual tip of the Cape, but which I did not find 
at Bamaga. Only careful collecting, with detailed ecological notes, 
can show the relationships of these species to each other in nature. 
Two obvious possibilities are that convexulus may be a new species 
originating within the range of convexus , or that it may be an old 
species on the point of extinction. 
Tachys , group unknown 
Tachys trunci n. sp. 
Form as figured (Fig. 2), oval, convex, compact; dark reddish 
piceous, each elytron with a partial transverse-oblique pale fascia about 
3/5 from base, said fascia reaching neither margin nor suture, the 
inner end being further forward than the outer; appendages pale, 
maxillary palpi and outer part of antennae browner; very shining, 
without or almost without dorsal microsculpture (reticulations faintly 
indicated on front of head). Head .65 width prothorax; eyes moder- 
ate in size and prominence; antennae moderate, segments 2 and 3 
subequal, middle segments less than 2X long as wide; frontal sulci 
linear, slightly diverging posteriorly, not crossing clypeus; mentum 
with two rather small foveae but not perforated, with median tooth. 
Prothorax transverse, strongly narrowed in front, slightly so behind; 
width/length 1.53; base/apex 1.43; base/head 1.39; sides broadly 
arcuate through most of length, slightly but broadly sinuate before 
base ; apex subtruncate with anterior angles narrowly rounded ; base 
somewhat sinuously subtruncate; basal angles well defined, approxi- 
mately right, strongly carinate, the carinae curving inward anteriorly; 
side margins narrow, a little wider posteriorly, each with usual 2 setae 
about 2/5 from apex and near basal angle; disc very convex, anterior 
transverse impression linear, deeply impressed, entire (unusual in 
Tachys ), middle line lightly impressed, not reaching base, basal 
transverse sulcus linear, faintly and finely punctulate, but interrupted 
and with a conspicuous fovea at middle. Elytra rather broadly oval ; 
E/P 1.28; lateral margins apparently ending at or just inside of 
humeri (this detail not clearly visible without manipulating the single 
specimen, which I am unwilling to do) ; margin behind humeri vague- 
ly (hardly distinctly) subserrate and setulose ; stria 1 (sutural) deeply 
impressed and entire, very deep and curving outward at base; other 
