412 Suarp—On New Zealand Coleoptera. 
Artystona collaris, 1. sp.—Klongata, nigricans, vix nitida antennis tarsisque 
rufescentibus, capite thoraceque subtiliter minus crebre punctatis, subopacis, hoe 
ante basin in medio transversim depresso, elytris striato-punctatis, interstitiis 
apicem versus parum tuberculato-elevatis. Long. 13 m.m. 
This is readily distinguished from A. wakefieldi by the more obsolete sculpture 
and the less shining surface. In these respects it is nearer to A. obscura; but that 
is more convex and less elongate, and has no trace of the depression at the base of 
the thorax. 
Dunedin. G. Copland; sent by G. M. Thomson, Esq. 
Artystona obsoleta, n. sp.—Elongata, nigricans, pedibus piceis antennis 
tarsisque rufis; capite thoraceque subtiliter minus crebre punctatis, subopacis ; 
elytris obsolete striato-punctatis vix nitidis, vix tuberculato-elevatis. Long. 
12 m.m. 
This is distinguished from all the other species by the comparatively obsolete 
sculpture. 
Castle Hill. Hnys. I owe my example to the kindness of C. M. Wakefield, Esq. 
Maracoprya (nov. gen. Helopinorum). 
Corpus subdepressum, dense punctatum, antennis pedibusque gracilibus, 
elongatis; caput parvum, oculis magnis anterius emarginatis, antennarum basi 
exposito. Palpi maxillares articulo ultimo subsecuriforme. Coxe anteriores 
leviter prominule, haud late distantes, acetabulis occlusis ; prothorax marginatus. 
Pedes ubique pubescentes, tarsis linearibus. 
This is another anomalous genus of Heteromera; as it has the anterior coxal 
cavities closed, the prothorax margined, and the claws simple, the only families of 
Heteromera where it can be located are the Tenebrionides and the Lagriides of 
Lacordaire. ‘These two families are, however, separated by a character of only 
minor importance, viz. the greater prominence and contiguity of the front coxe 
in the latter, and in this respect the present genus is intermediate between them ; 
as it does not possess sufficiently the characters of the Lagriides it should be placed 
in the Tenebrionides, as at present understood, though I must admit that it is 
entirely different im its facies to the typical components of the family. Its 
structure, however, is not very different from Artystona, the most important 
differences being that in Malacodrya the antenne are quite exposed at their point 
of insertion, and that all the coxze are less widely separated, the prosternum 
between the front cox being, moreover, a little less prominent than the tips of 
the coxee. 
The mandibles of Malacodrya are small, and bidentate at the apex ; the mentum 
is small, broader than long, and the ligula quite exposed at its extremity. The 
