504 



Nesithmysus haasii sp. n. 



Black, scape of the antennae to a large extent, as also the small 

 2nd joint, the next two basally and the others on one side at least, 

 though very obscurely, red or reddish. The trochanters, basal part 

 of femora, tibiae for the most part, and basal portion of first tarsal 

 joint also red. Face for the most part densely clothed with yellow 

 hairs, the top of the head rather less densely. Pronotum with the 

 median crest greatly raised in front, less strongly behind, coarsely 

 rugosely sculptured, the anterior prominence bluntly triangular in lateral 

 aspect, the hinder one curved, the prominences on either side of this 

 strong and blunt, the lateral angles near the middle of the length of 

 the pronotum obtuse and not strongly prominent, much less so than 

 in the preceding species. The yellow vittae on either side of the median 

 crest are conspicuous, widely separated, and irregular in width and 

 are connected with the outer ones broadly in front and narrowly behind; 

 these latter occupy all the flanks of the pronotum downwards from 

 their origin except that the prominent lateral angles form a smooth 

 glabrous area amongst the yellow hairs. The metepisteri|a have a 

 dense yellow patch of hair posteriorly and there is another anterior 

 to this on the mesopleurae. The elytra are about five times the length 

 of the pronotum, very densely, finely and distinctly punctured all over. 

 a yellow line on each just within the suture from apex to base, con- 

 tinued across the deflexed basal surface to near the shoulders and 

 then continued backwards as a second longitudinal oblique line, which 

 adjoins the sutural one at about the middle of the length of the elytra. 

 Along the upturned lateral margin of these is a dense narrow line of 

 similar yellow hairs extending from base to apex. The first four ventral 

 segments of the hind-body have a pair of distinct yellow spots apically, 

 the 5th is simply rounded or slightly truncate at the apex and not at 

 all emarginate. Length about 25 mm. Female. 



In the unique specimen described the yellow pubescent lines 

 are in parts interrupted owing to abrasion, but are here 

 described as if they were entire. The longitudinal ridges of 

 the elytra, similar to those in some Plagithmysiis, in which 

 they often vary in individuals, are very definite in this specimen, 

 the inner ones reaching behind the middle, the outer ones still 

 further. 



Hab. — Oahu, Wahiawa (Chas. Haas). A single example 

 in the collection of Mr. O. H. Swezey. 



In the thick forest behind Waialua, twenty years ago, large 

 exit holes of a Longicorn supposed to be Plagithmysus were 

 found in some of the big Pelca trees growing there. Very 



