Colydiidge oj New Zealand. 23 



lowing joints ; ninth joint small, but yet a little produced 

 inwardly ; tenth joint broad, strongly transverse ; eleventh 

 nearly as broad as tenth. Parts of the mouth small ; maxil- 

 lary palpi thick but very short. Eyes small, coarsely faceted. 

 Antennal cavities not prolonged 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 in- 

 distinct ; 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. 



Ithris gracilisj n. sp. 



/. subcyliadrica, angustula, rufescens, opaca ; prothorace minus 

 distiucte trisulcato ; elytris costatis. Long. corp. vix 3 m. m., 

 lat. |- m. m. 



Antennee 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 ele- 

 vated ; its surface rather densely but indistinctly punctured, so 

 as to be almost 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 costte, and the surface be- 

 tween them densely sculptured, so that they arc quite di:ll. 

 Legs reddish yellow. Under surface dull, but only finely and 

 indistinctly punctured, and with an extremely scanty and fine 

 pubescence. All the pairs of coxae are only slightly separated j 

 the metasternum is elongate ; the epipleurse are narrow, and 

 not accurately adjusted to the body ; the tibige are 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 little from one another in length ; the first 

 ventral segment, though not elongate, is distinctly longer than 

 the second. 



Auckland. A single individual, sent by Mr. Lawson. 



Ohs. This species is an undoubted member of the Colydnni] 

 and as it displays pretty much the characters assigned by 



