COLEOPTERA 



399 



D. grandicollis that I cannot distinguish them on such slender evidence : they are 

 (i) a specimen found dead and completely abraded on Molokai, about 3000 ft. in May 

 or June, 1893: (2) a specimen found on Haleakala, Maui, about 5000 ft. in May, 1895 

 (no. 610): (3) a specimen found on Kauai on the high plateau in August, 1896 

 (no. 682). I should suppose that the example from Maui may prove to be distinct, as 

 it has a larger and broader thorax. The other two are superficially extremely near 

 to the Hawaiian examples. 



Hab. Hawaii: Kona, 2500 and 4000 ft. (Perkins). — Also Molokai?, Maui?, 

 Kauai ?, as above. 



{si) Di-oniacolits piiviilio, sp. no v. 



Brevis, conve.xus, rufus, antennis extrorsum obscurioribus, pedibus flavis ; omnium 

 parce obsoleteque punctatus et pubescens. Long. 2| mm. 



Plate XHI. fig. 13. 



This little insect appears to be very distinct ; the thorax is scarcely at all narrowed 

 in front, the antennal grooves are not definitely limited behind, the prosternal process 

 is minute ; the abdomen is very short, so that the coxal laminae are short and transverse, 

 though they extend as far as the first ventral suture : the head is deeply retracted in 

 the thorax, the anterior opening of the latter being large : the angles of the thorax 

 are large, and very closely applied to the elytra, and there is a considerable depression 

 of the surface in front of the angles. The antennae are moderately long and stout, 

 with the fourth joint rather longer than broad. There is almost no punctuation and 

 only a scanty pubescence on the thorax, so that it is unusually shining ; the elytra are 

 much narrowed behind, delicately striate, with but little punctuation. Legs moderately 

 stout, terminal joint ot tarsus with the claws moderate. Two specimens. 



Hab. Oahu : Kawailoa gulch, April, 1893 (no. 415, Perkins). 



Ceratotaxia, gen. nov. 



Antennae articulis 4 — 7 brevibus subaequalibus, articulis 8 — 1 1 elongatis sub- 

 aequalibus. 



Prothorax absque canaliculis. 



Coxae posteriores, exterius brevissimae, interius abrupte sat dilatatae. 



This genus can only be placed near to Tharops, from which it differs widely in 

 the structure of the antennae, agreeing in this with Dyscolotaxia Horn. Dyscolotaxia 

 is said however to be, except in respect of its antennae, a Eoniax ; and it that be 

 correct, then Ceratotaxia can have no connection with it, owing to the absence of 

 antennal grooves, and to the form of the coxal laminae. It appears therefore at present 

 to be quite isolated from any known form. 



F. H. III. 52 



