364 SHarp—On New Zealand Coleoptera. 
above. The thorax is very broad, the length however being more than three- 
fourths of the width, without sculpture, with the lateral margin rather broadly and 
evenly reflexed from base to apex, the base a little narrower than the front, the 
hind angles unusually obtuse. The elytra are very broad, rather short, very 
deeply and evenly striate, with a single puncture placed near the extremity of the 
second interstice. The grooving of the tarsi is variable in its development; it may 
be, and usually is, nearly entirely absent, but in other examples there is a distinct 
groove on each side of the middle of the basal joints, extending sometimes as far 
as the fourth. The male has three, the female five setigerous punctures on each 
side of the hind margin of the last ventral segment. The only examples I possess 
of this species were found at Auckland by Lawson, as recorded by Bates. It is 
allied by the single puncture on the second interstice to Colpodes neozealandicus, 
Chaud. Whether this latter species be C. noveezealandiz, Fairm. or not I cannot 
say ; Fairmaire’s species is not alluded to by Chaudoir. 
It may here be useful to state, for the information of New Zealand naturalists, 
that in the Annales de la Societé entomologique de France, 1878, Chaudoir has 
described five species from New Zealand purporting to be new, viz., Colpodes 
neo-zealandicus, p. 294, bidens, p. 303, crenatus, p. 304, cardiophorus, p. 806, 
macropterus, p. 370. These are not alluded to by Broun, so that it is probable 
that some of his numerous species may be synonymous with those of Chaudoir. 
Ctenognathus pictonensis, n. sp.—Niger antennis pedibusque leete rufis; pro- 
thorace cordato, secundum latera fortiter depresso, angulis posterioribus argute 
rectis; elytris fortiter profundeque punctatis, apicibus prolongatis, interstitio 
secundo ante apicem puncto unico notato. Long. 11m.m. (Plate xu, fig. 5.) 
This species is distinguishable by the bright-coloured legs and antennz, the 
deep striation of the elytra, and the very cordate thorax, whose hind angles are 
sharply rectangular; the lateral margin of the thorax appears much elevated, 
owing to a depression extending parallel to it, and within this there is a second 
curvate feeble impression ; the surface near the hind angles is greatly depressed, 
the median channel and the anterior transverse impression very deep; there is no 
distinct punctuation or rugosity. The very deep elytral striz are, when strongly 
magnified, seen to be only very indistinctly punctured; their apices are gently 
sinuate and a good deal prolonged. The tooth of the mentum is entire, but 
broad and truncate at the apex: the fourth joint of the hind tarsus feebly emargi- 
nate, the surface of the tarsus deeply grooved on each side of the middle, and with 
a less distinct lateral groove. 
This is readily distinguished from A. helmsi, which has similarly coloured 
legs and antenne, by tie remarkably deep striation of the elytra, and by there 
being only one tactile seta on each side of the thorax. 
Picton, Helms, a good series. 
