1962] 
127 
Darlington — Tachys 
Tachys bolellus n. sp. 
With characters of ectromioides group as here defined. Color dark 
reddish castaneous, appendages rufous; rather shining, reticulate 
microsculpture of upper surface isodiametric on front, finer and strong- 
ly transverse on disc of pronotum but isodiametric and in part actually 
longitudinal in anterior-median area of pronotum, scarcely resolved 
on elytra but probably present as very fine transverse lines, for elytra 
slightly iridescent. Head .68 & .64 width prothorax; antennae rela- 
tively short, middle segments c. 1 X or slightly more long as wide. 
Prothorax strongly narrowed anteriorly, much less so posteriorly; 
width/length 1.29 & 1.39; base/apex 1.46 & 1.43; base/head 1.27 & 
1.34; apex subtruncate or very broadly emarginate; base subtruncate, 
very slightly lobed at middle; sides rather broadly arcuate anteriorly, 
nearly straight and moderately converging posteriorly, slightly or 
scarcely sinuate before base; lateral margins moderate anteriorly, 
slightly broader posteriorly, each with usual 2 setae at apical 2/5 and 
basal angle; basal angles slightly obtuse (nearly right) , sharply defined, 
costate; disc with rather vague anterior transverse impression, strongly 
impressed middle line, broader basally, and reaching base ; basal sulcus 
well impressed, interrupted at middle; baso-lateral impressions rather 
large, deep, margined posteriorly, and margined exteriorly by strong 
costae. Elytra broad (E/P 1.49 & 1.48), oval, widest near or slightly 
behind middle; all striae indicated, but outer ones faint or almost 
obsolete; dorsal punctures lacking. Length 2.6-2. 8; width 1.1-1.2 mm. 
Holotype cf (M. C. Z. Type No. 30333) and 8 paratypes all 
from the Williams River Valley a little above Barrington House, at 
the foot of the Mount Royal Range, New South Wales, October 1957, 
taken by myself. All the specimens were taken by washing wood-debris 
from a rotten log lying on the ground in heavy gallery forest near 
the river. 
The present new species is sufficiently distinguished from bolus and 
ectromioides in the preceding key. 
(Some additional Tachys will be treated in the next number of 
this series.) 
References 
Blackburn, T. 
1901. [Australian Bembidiini.] Trans. R. Soc. South Australia 25: 
120-124. 
Darlington, P. J., Jr. 
1962. Australian carabid beetles X. Bembidion. Breviora (in press). 
