COLEOPTERA 573 



long. The antennae are moderately short and stout, the penultimate three joints slightly 

 transverse. The head is moderately broad, very dull; the large impressed punctures — 

 so distinctly seen in D. robusta — are present, but very nearly obsolete. The punctuation 

 of the thorax and elytra is also very obsolete. The unique individual is, I think, a 

 female. 



H.\B. Molokai, 4000 ft., 15. vi. 1S93 (Perkins). 



(20) Diestota lanaicnsis, sp. nov. 



Fusca, subdepressa, antennarum basi palpisque tusco-testaceis, pedibus sordide 

 testaceis; obsolete punctata breviterque pubescens, capite medio minutissime foveolato, 

 antennis articulis 6" — 10° transversis, mesosterno ecarinato. Long. 4 mm. 



This is a very Athetiform species; it is less depressed than D. palpalis and latifrons, 

 to which it is allied by the absence of carina on the mesosternum. The surface is very 

 dull, except that the abdomen is a little shining ; there is no true punctuation ; there 

 is a very obscure fovea on the middle of the head, but no impression on the thorax. 

 The male has the last dorsal plate truncate behind, almost straight, the margin a little 

 thickened, but destitute of teeth or serrations. One specimen. Very distinct, on account 

 of the male characters. 



Though D. lanaiensis and the following species are very much alike, and are 

 established each on single individuals (with the exception of D. nianieusis, of which I 

 have seen three examples), I believe they will all prove to be valid. 



Hab. Lanai, about 3000 ft. 1S94 (Perkins). 



(21) Diestota luaiiieiisis, sp. nov. 



Nigricans, supra subplanata, antennarum basi, palpis pedibusque sordide testaceis; 

 capite, thorace elytrisque omnino opacis, subtilissime sculpturatis. Long. 2^^ — 3^ mm. 



Extremely similar to D. occidentalism but with the punctuation of the head quite 

 obsolete. The species is distinguished from the rather smaller forms which follow by 

 the structure of the antennae, of which the 2nd and 3rd joints are subequal in length, 

 and the 4th and 5th almost quadrate, not distinctly transverse: the mesosternum is not 

 carinate: the legs, including the tarsi, are slender. The male has a moderately long 

 tooth on each side on the hind margin of the last dorsal plate, and between them eight 

 small denticles. 



Hab. Maui: West Maui, mts., 4000 ft. on Frcycinetia in 1894, no. 36S ; Haleakala, 

 2000 — 3000 ft., September 1901 (Perkins). 



