Coleoptera.] SUBANTARCTIC ISLANDS OF NEW ZEALAND. 79 



Catodryobius with five species, Inocato-ptes with one. and Heterexis with two 

 are all comparatively large, apparently apterous, and in several cases rather finely 

 decorated weevils. They exhibit no very salient structural characters ; their whole 

 structure, indeed, may be termed primitive. Heterexis is found at Adams Island 

 only; the others occur at Carnley Harbour, the Snares, Enderby, and Disappoint- 

 ment Islands, but not elsewhere, so far as I know. 



Hijcanus, with two rare obscure species, and Slilhodiscus with one. are un- 

 dcuibtedly allied to the New Zealand Cbjpeorhynchus, whilst Pachyderris, with a 

 unique specimen only, is related to some of the New Zealand allies of Acalles. 



Pactolotyfus, another small weevil, is almost a fac-siraile of the New Zealand 

 Pactola demissa as regards both superficial appearance and structure, but is at once 

 distinguishable by its 6- jointed funiculus. 



B(teosiethug is remarkable for the extreme abbreviation of its metasternum as 

 compared with its peculiarly elongated body ; this reduction is so great that the 

 intermediate coxae almost overlap the posterior pair. So far as I am aware, it has 

 no near relationship outside of its habitat, Campbell Island 



Kenodactylus, also from Campbell Island, is a small, somewhat depressed, geo- 

 dephagous beetle of special interest. The form and vestiture of the basal 2 articu- 

 lations of the tarsi approximate it to Ooptems and the New Zealand Diglymma, 

 but the prominent horny lobe attached to the 4th joint of all the tarsi at once dif- 

 ferentiates it, and indicates an affinity with Loxomerus. 



Mecodemn, a fine genus, has two Australian, one Tasmanian. and upwards of 

 thirty New Zealand species, but appears to have but one in the south, at tlie Snares. 



Diglymma, hitherto regarded in New Zealand as endemic, with seven species, 

 has one at the Snares. 



Oopterus was originally defined as an antarctic form. The Auckland Islands 

 have now contributed six species. New Zealand double that number. 



Liochonn, instituted for a New Zealand species allied to Morychus, has had 

 two beautiful species added to it from Carnley Harbour. 



Odontria, another New Zealand genus, now comprises twenty species, one of 

 which was obtained at the Snares. 



Namostygnus, from Carnley Harbour, TJiomosis, from Bounty Island — one ex- 

 ponent of each — are nearly allied to New Zealand genera, slight modifications only 

 being required to transform them. 



Si/ntemtus completes the generic synopsis. Although a very small member of 

 the predaceous ground-beetles, it is, nevertheless, significant and instructive, ex- 

 hibiting in its general aspect and structure the connection between Oopterus and 

 the New Zealand Amarotypus. This latter, though outwardly resembling the northern 

 Amarn, is structurally allied to Migndops and Loxomerus. 



Having briefly sketched the more salient characteristics of most of the genera, 

 we have now before us some data that may enable us to form some definite con- 

 clusions. Before attempting this it may be necessary to state that I have had to 

 create twelve new genera and describe thirty-nine new species, so as to arrange the 

 older as well as the recent collections into something like systematic order. 



