SHarp—On New Zealand Coleoptera. 427 
This genus is closely allied to several others already found in New Zealand: 
the mentum fills the buccal cavity about as completely as it does in Catoptes, and 
the peduncle is excessively short 
almost, in fact, wanting—so that the genus 
should clearly be placed in Lacordaire’s ‘‘ Adelognathes:” 
it differs from Catoptes, 
however, by the elongate rostrum and the distinct ocular lobes, as well as by the 
definite elongate scrobes; from Platyomida it departs by the ocular lobes, by the 
mentum more completely fillmg the buccal cavity, and by the less elongate scape 
of the antenna; and from Inophlceus by the rather more definite scrobes and 
shorter scape, and the much more filled buccal cavity ; the basal portion of the 
mentum bears a rather deep semicircular impression, the anterior part being 
smooth and shining ; the first ventral segment is moderately long, separated from 
the second by a suture which departs comparatively little from the rectilinear form; 
the second is not large, only equal to the two following together; the terminal 
segment is only moderately large ; the legs are elongate and stout, with the tarsi 
spongy-pubescent; the lobes of the third joint perfectly developed; the form of 
the wing-cases in the only species known is very curious: they have a flat dise, be- 
coming broader behind, and terminating as two obliquely truncate prominences, 
the apex being so abruptly declivous that it projects scarcely so far backwards as 
the angles of the dorsal prominences do. The genus is allied to the Chilian 
Megalometis and Strangaliodes. 
Heterodiscus insolitus, n. sp.—Niger, squamulis et indumento sordide grises- 
cens, rugosus, elytris apicem versus latioribus, disco pone medium quadrangulariter 
prominulo, quasi truncato. Long. 8 m.m. ; rostr. incl. ll m.m. (Plate xu, fig. 13.) 
Upper surface of rostrum with four grooves, the lateral being less distinct than 
the two median ; second and third joints of antennz moderately long, subequal ; 
thorax subcylindric, nearly as long as broad, slightly narrowed towards the front 
on the anterior third, longitudinally depressed along the middle, and with the 
surface coarsely rugose ; elytra with slight elevations not sufficiently marked to be 
termed nodules, and also with regular series of impressed rather distant punctures ; 
apparently truncate behind, the disc forming two slight angles near the suture, 
and also an external angle on each side, the apical declivous part large; the width 
of the wing-cases at the base is the same as the base of the thorax, and there is a 
very minute scutellum; the legs are thick, the front tibiae mucronate, the claws 
short and thick: in addition to the squamosity of the surface there are also a few 
pallid setze, which become numerous on the legs. 
Picton, Helms; a good series. 
Heterodiscus horridus, n. sp.—Niger, tuberculato-rugosus, indumento sordido 
plus minusve obscuratus, elytris apicem versus latioribus, disco pone medium 
quadrangulariter prominulo, quasi truncato. Long. 7 m.m. 
