442 FAUNA HAWAIIENSIS 



This is another species of which only a single specimen— a female — has been found, 

 but I do not doubt its isolation ; the pygidium is coarsely punctate and is more acuminate 

 in the middle of its hind margin than in any of the immediate allies ; hence this plate 

 projects very much farther back than the ventral plate, the hind margin of which is 

 very slightly rounded ; in consequence of this structure the insect when seen from 

 beneath has all the appearance of possessing a supplementary segment, although a 

 female. Added to this the sculpture of the elytra differs from most of the allies, there 

 being no grooves, but distinct series of fine punctures. The antennae are only mode- 

 rately long, and the club is clear yellow ; the legs are also clear yellow, and the under- 

 surface is nowhere infuscate. The thorax is a good deal narrowed in front, densely, 

 somewhat finely punctate ; it has some vague impressions on the disc and the sides are 

 much explanate. The side margins of the elytra are also markedly explanate. The 

 pubescence of the thorax and elytra is moderate. 



The acuminate pygidium readily distinguishes the insect from the female of 

 G. arduus ; the largest females of which superficially resemble G. aciuninatus. 



Hab. Oahu, behind Pauoa Valley, 29. iii. 1895 (Perkins). 



(6) Gonioryctiis suavis, sp. nov. 



Elongatus, ferrugineus, capite, elytris, pectore thoracisque marginibus exceptis 

 infuscatis ; prothorace majore, densissime punctato ; elytris obsolete sulcatis, subtilissime 

 punctatis, subtiliterque pubescentibus. ^ Long. corp. 9 mm., lat. .3, long, prothoracis 

 2, lat. proth. 2f, long, elytr. 3^, lat. elytr. 3 mm. 



Plate XIII. fig. 19, ^. 



The measurements are those of a fine male, the female appears to be a little 

 smaller, and specially shorter, one being only 7^ mm. long. 



The species is closely allied to G. latiis, but is perfectly distinct, the sex characters 

 being different. G. suavis is also rather larger and more elongate, with finer sculpture. 

 In the male the pygidium is rather long, truncate at the tip with the angles rounded; the 

 last ventral is not bisinuate but has the angles prolonged backwards ; the supplementary- 

 segment is long and narrow, almost truncate at the tip. In the female the pygidium is 

 rounded behind ; the last ventral plate is narrow at the tip, truncate with the angles 

 rounded, and with a good deal of pubescence on each side of the hind margin. 



There is a more or less obsolete median longitudinal line on the thorax, and the 

 pubescence lies in difterent directions on either side of this, the hairs being directed 

 towards the middle line. 



Hab. Maui. Haleakala, 3000 — 4000 ft., under Koa bark, &c. (nos. 361, 772); 

 West Maui, Jao Valley (nos. 349, 689, Perkins). 



A specimen with rather shorter thorax, and very dark in colour — the legs being 

 nearly entirely black — is assigned to this species. It is a male and the characters of 

 the sex seem to be the same as in the typical form. Haleakala, 3000 — 4000 ft., i. v. 

 1894 (no. 361, Perkins). 



