750 COLEOPTERA 



Group PE RON ID^E. 

 Trichostemus (p. 3 1 )- 



1330. T. putUS, n.s. Colour black tinged with red and green; 

 legs pitchy-black, tibiae occasionally red, tarsi and antennas piceo- 

 rufous ; oblong, moderately convex. 



Head moderate, smooth ; ocular orbits large and gradually nar- 

 rowed behind. Prothorax sub-quadrate, widely incurved apically, 

 base emarginate ; sides rounded and sinuously narrowed towards 

 the rectangular posterior angles ; the dorsal groove extends from the 

 base and terminates in the frontal impression ; the basal foveas are 

 deep, almost sulciform, but extend outwardly close to the base so 

 as to form a transversal depression near each angle. Elytra 

 oblong, punctulate-striate, interstices somewhat convex ; shoulders 

 dentate. 



This species is abundantly distinct. On examination it will be 

 observed that the basal joint of the antennas is depressed or broadly 

 grooved above ; that the posterior tibias terminate inwardly in a 

 robust calcar-like process, and that the basal articulation of the tarsi 

 (hind) is very much compressed laterally, and widely furrowed under- 

 neath. 



$ . Length, n lines; breadth, 4. 



The discovery of this species at Mount Arthur is due to Messrs. 

 T. F. Cheeseman and Fred. Combes, of Auckland. No females were 

 obtained. 



T. COHlbesi, n.s. Oblong, sub-depressed; shining- 

 black with green and red metallic reflections, the latter hue pre- 

 dominating; antennas and trophi dark red, femora blackish, tibias 

 and tarsi rather clear bright red. 



Head rather broad, somewhat uneven, epistome and vertex bi- 

 punctate ; eyes prominent. Prothorax sub-quadrate, transversal, 

 rounded laterally and sinuously narrowed towards the posterior 

 angles ; the basal fovese are deep and rather narrow, and, in addi- 

 tion, a smaller depression occurs near each angle. Elytra oblong, 

 their humeral angles distinct, punctulate-striate, interstices plane. 



The following are distinguishing characteristics : The first antennal 

 joint is broadly sulcate above, and several of those which follow are 

 peculiarly compressed at the sides ; the basal joint of the posterior 

 tarsus is long and narrow ; and the elytral interstices, second, fourth, 

 and sixth, are more or less reduced in width, particularly in the 

 vicinity of the base. 



? . Length, 1 1 lines ; breadth, 4. 



I have named this fine insect in honour of Mr. Fred. H. Combes, 

 of Auckland. It was found by him on Mount Arthur ; but, unfortu- 

 nately, no examples of the male were procured. 



I 332. T. humeralis, n.s. Oblong, moderately convex, brilliant 

 greenish-black ; legs and antennas rufo-piceous, tarsi red. 



Head not much narrower than thorax, smooth and somewhat 

 contracted behind, forehead with the common impressions ; eyes 



