388 Suarp—On New Zealand Coleoptera. 
This is the largest of the New Zealand Colydudze, and though similar to E. 
bakewelli and E. wakefieldi, is readily distinguishable by the peculiar thoracic lobe 
over the head, this being remarkably elongate, not deflexed, and with its sides much 
raised; these raised sides, moreover, curve round at the front of the lobe and 
nearly meet one another, being separated only by a slight fissure. The inequalities 
of the surface are greater than im the other species, and the disc of the elytra flatter, 
the tubercles behind more prominent, so that the apical portion is more abruptly 
declivous ; the joints of the antenne, too, are longer than in any of the other species. 
Greymouth. Helms, No. 280. Mr. Helms sent me, some time ago, two individuals of this 
species, but I feared to describe it, thinking it might just possibly prove to be a large variation 
KE. bakewelli or E. wakefieldi; he has recently, however, been able to accede to my request for 
further examples, and I have no doubt it is a quite distinct species. 
PycNOMERUS. 
As the New Zealand species of the genus Pyenomerus are now rather numerous, 
the following note may facilitate their study :—The genus Penthelispa cannot now 
be maintained, because the New Zealand species supply a transition between those 
with antenne of ten joints and those with eleven. The majority of the New Zea- 
land species belong to the ordinary form of the genus, as found in various parts of 
the world, having large eyes and an elongate metasternum ; to this group belong P. 
sophore, simulans, minor, longulus, Shp. and Penthelispa acutangulum, Reitt. At 
Greymouth Mr. Helms has met with two very interesting species, nearly or quite 
blind, and with a short metasternum; these species, P. sulcatissimus and P. 
latitans, form a group peculiar to New Zealand, but are connected to the normal 
type of the genus by an intermediate form, P. helmsi. The most abundant and 
variable of the species is P. sophoree, of which I have seen a large number of 
examples from each of the two islands. When its variations are understood the 
other species are very easily determined; P. sophorz varies remarkably in the 
punctuation, so that the surface is sometimes quite dull, while in other varieties it 
is nitid, on account of the punctuation being much scantier ; it is distinguished by 
the prominent anterior angles of the thorax, and the shape of the discoidal impres- 
sion on this part, which assumes the form of a rather deep quadrate depression in 
front, with a shght prolongation backwards, this posterior part being obscurely 
divided by a very slight, broad elevation. PP. simulans greatly resembles P. 
sophorze, but the discoidal impression extends nearer to the base of the thorax, and 
is divided by an elongate smooth carina; this species also occurs in both the main 
islands. P. longulus is readily distinguished by its elongate form, less deeply 
sculptured elytra, with broader, flat interstices; this I have seen only from the 
southern island. P. minor is like a small P. longulus, but less elongate, with very 
indistinct thoracic impression, and antennal club only indistinctly divided. P. 
acutangulum, Reitter I have not been able to recognize, and do not feel sure that 
