896 Transactions. —Z oology. 
nearly as broad as tenth. Parts of the mouth small; maxillary palpi thick 
but very short. Eyes small, coarsely faceted. Antennal cavities not pro- 
longed on underside of head. Thorax quite as long as broad, greatly 
narrowed behind, extremely convex transversely, especially in front; so 
sculptured as to appear covered with strongly elevated tubercles. Elytra 
narrowed towards the base, so that the shoulders are quite indistinct 
sculptured in a similar manner to the thorax. Under surface with deep 
pits and depressions, the ventral sutures very deep. 
A single specimen sent from Auckland by Mr. T. Lawson, in whose 
honour I have named this little species, one of the most interesting of those 
he has discovered, i 
Ithris gracilis, n. sp. 
I. subeylindriea, augustula, rufescens, opaca; prothorace minus dis- 
tincte trisuleato; elytris costatis. Long. corp. vix 8 m.m., lat. 
3 m.m. 
Antenne yellowish ; first joint in large part exposed from above, second 
short and stout, third to eighth small, ninth and tenth forming a large broad 
club, ninth and tenth each strongly transverse, eleventh large. Head with 
the sides greatly elevated; its surface rather densely but indistinetly 
punctured, so as to bealmost opaque, Thorax longer than broad, the sides 
straight and parallel, along the middle with a broad but ill-defined groove ; 
and on each side of this central depression there is also another, but very 
obsolete, depression ; the surface is densely and indistinctly sculptured, and 
is quite dull. Elytra each with three or four longitudinal coste, and the 
surface between them densely sculptured, so that they are quite dull. Legs 
reddish-yellow. Under surface dull, but only finely and indistinetly punc- 
tured, and with an extremely scanty and fine pubescence. All the pairs of 
coxe are only slightly separated ; the metasternum is elongate; the epi- 
pleure are narrow, and not accurately adjusted to the body ; the 
considerably dilated at the extremity, and exhibit small but distinct spurs ; 
the tarsi are slender, with the three basal joints rather short, and differing 
but Jittle from one another in length; the first ventral segment, though not 
elongate, is distinctly longer than the second. 
tibiæ are 
Auckland : a single individal, sent by Mr. Lawson. 
Obs. This species is an undoubted member of the Colydiide ; and as it 
displays pretty much the characters assigned by Mr. Pascoe to his genus 
lihris, I have used that word as part of its name. In many respects it 
approaches Colydium elongatum rather closely, and probably, like that 
species, lives in burrows in wood. 
