OF NEW ZEALAND. 1197 



posterior part flat. Elytra rather" elongate ; without nodulosities ; 

 the third interstice slightly raised, and incrassate at the base. 



Bealey. Helms ; one example. 



This is a very peculiar species, and might, so far as the 

 systematic characters go, be almost as well placed in Catoptes aS~irr 

 Brachyolus. The only example shows the strange peculiarity of 

 possessing an elongate narrow excision on the last ventral plate. 

 Possibly the specimen* is abraded, but the squamosity is probably 

 always obscure. 



Heterodiscus. 



Nov. gen. 

 (Sharp; Trans. Boy. Dub. Soc., 1886, p. 426.) 



Rostrum modice elongatuin, crassum, apice manifesto crassiore 

 superne ad apicem plaga triangulare munitum ; scrobes terminales, 

 elongati, subrecti, oculos haud attingentes ; antenna modice elongatae, 

 scapo oculorum marginem anteriorem attingente. Protkorax lobis 

 ocularibus tantum modice prominulis munitus ; coxa: anteriores 

 magnae prominulae, contiguee ; metasternum brevissimum ; tarsi 

 articulo tertio bilobato. 



This genus is closely allied to several others already found in 

 New Zealand ; the ment-mn 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 rnentum more completely filling 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 disc, becoming 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 pro- 

 minences do. The genus is allied to the Chilian Megalometis and 

 Strangaliodes. 



OBS. This genus scarcely differs from Echinopeplus. T. B. 



2120A. H. insplitUS, n.s. (Sharp ; Trans. Boy. Dub. Soc., 

 1886, p. 427.) Niger, squamulis et indumento sordide grisescens, 



