362 SHarp—On New Zealand Coleoptera, 
Head without punctures or wrinkles; with prominent eyes, and very indistinct 
post-ocular constriction. Thorax, with a length nearly seven-eighths of the width, 
a little rounded at the sides, considerably narrowed behind, and with a gentle, not 
abrupt, basal sinuation ; the surface without sculpture, transversely convex ; the 
side margin not crenate, but infringed on by the punctures bearing the intra- 
marginal tactile setee, of which there are six on each side; hind angles rather 
obtuse, the lateral fovea indistinct. Hlytra large, parallel-sided, with regular, 
very broad, deep striz, bearing coarse punctures. Front tibiz with moderately 
long apical prolongation ; middle tibize a little, hind tibize scarcely at all, imcras- 
sate at tip. 
This bears a considerable resemblance to M. monilifer, Bates, the typical 
species of the genus, but is distinct by some important characters; the antenne 
are shorter, and the pubescent arez on their upper and lower margins are greater ; 
the thorax has a basal prolongation ; the elytra are deeply sulcate, and the tibize 
much less dilated at the extremity, 
Picton. Helms, three examples, in bad condition. 
ACALLISTUS (noy. gen. Broscinorum). 
Ex affinitate generis Promecoderi, sed corpus superne subplanatum, et tarsi 
intermedii maris simplices, anteriores subtus imperfecte spongiosi. 
The insect for which I establish this genus is very different from the other 
New Zealand Broscide, the thorax being finely margined at the sides, and fur- 
nished with only two tactile setee, one some distance behind the front angle, and 
the other about equally as much in front of the hind angle. The antennz are 
slender, pubescent from the fourth joint onwards; the front tibize are not at all 
prolonged externally ; there is a seta in the scrobe of the mandible ; the labrum is 
large, feebly emarginate—almost truncate in fact—in front, and its setigerous 
punctures are minute. The palpi are all slender, with slightly truncate apex ; the 
lobes of the mentum rather short, and its excision has a small triangular tooth in 
the middle. The front tarsi of the male are but little dilated; the basal joint is 
rather elongate, and is furnished with a transverse patch of spongy clothing at its 
extremity; the second and third joints are nearly entirely covered beneath, but 
the small fourth joint appears to have no sexual clothing, though that projecting 
from the third jomt somewhat covers its base. The intermediate tarsi in this sex 
are not dilated, and are without clothing. 
The characters bring this genus very close to the well-known Australian genus 
Promecoderus, but the appearance is very different, owing to the comparatively 
flat upper surface of the body; and as the male feet present apparently well- 
marked differences from those of Promecoderus, it would not be proper to place the 
New Zealand insect in that genus. 
