OF NEW ZEALAND. 269 



forms. The auteume have their third and fourth joints about equal, the 

 club being four-jointed and pubescent. The last joint of the maxillary 

 palpus is a little narrowed apically. 



The insect is of a glossy yellowish colour, with dark-brown shining 

 marks as described by White, and the elytral suture is reddish and 

 rugose ; the legs are short but the tarsi are long, being obviously longer 

 than the tibiae, particularly the posterior pair. 



a 



473- O. COStGlla, n.s. Somewhat similar to O. rossii in form, 

 being rather elongate, and sub-depressed above. Head, exclusive of the 

 clypeus, very dark-brown, with rather shallow moderately coarse distant 

 punctures ; the clypeus transversal, narrowed towards the front, with an 

 emarginated apex and raised margins, it is coarsely punctate, somewhat 

 rugose laterally, and of an infuscate testaceous colour. Prothorax 

 transverse, more so than in O. rossii, finely margined, moderately convex, 

 its apex very obtusely rounded in the middle, so as to appear emargi- 

 nate near each side, its front angles not very acute, the sides are not 

 angulated, their outline being more of a gradual curve ; the surface is of 

 a brownish-testaceous colour with irregularly formed blackish spots, 

 which, in one example, form the predominant colour, and the puncta- 

 tion is not close, nor coarse, but all the punctures are dark in colour. 

 Scufelhnn testaceous, with a row of punctures near the margins. The 

 elytra are of the same width as the thorax at the base, and gradually 

 dilated posteriorly, so that they are widest near the apex, they are about 

 thrice the length of the thorax ; the sides and apex are deflexed and 

 finely margined, their extremity sub-truncate and usually covering the 

 abdomen, so that the pygidium is often invisible from above ; each 

 elytron bears three indistinct costse, the intervals between which are 

 broad and inclined to be rugosely punctate, the sculpture, however, 

 becoming less distinct behind ; they are variegated \\\xh. testaceous, 

 fuscous, and piceous spots, the latter colour sometimes forming abbre- 

 viated longitudinal lines, interrupted by testaceous spaces on the costse, 

 the suture is usually marked with fuscous and testaceous spots. The 

 legs are moderately long, the posterior tarsi are a little longer than the 

 tibiiE, yet shorter than those of O. rossii. 



The undcr-surface is sparingly punctured and pubescent, with a 

 longitudinal impression on the metasternum. The palpi have their 

 terminal joint a little thickened towards the extremity. In the male the 

 fourth antennal joint is rather shorter than the third, joints four to eight 

 forming a distinct pubescent club ; in the other sex the third and fourth 

 joints are about equal, the fifth is short and slightly produced, and the 

 last three form the club. 



Length, 4 lines ; breadth, 2. 



I found one female at Tairua, and a second specimen of that sex 

 and three or four males near Whangarei Heads. The size varies some- 

 what, one measuring 4 J by 2 J- lines. 



The insect may be at once distinguished from O. rossii, the only 

 species with which it is liable to be confounded, by its rather dull velvety 

 appearance, distinctly emarginate clypeus, shorter thorax, and posteriorly 

 dilated elytra. The pygidium in both species is more or less punctate. 



