258 FAUNA HAWAIIENSIS 



and the hind angles are exactly rectangular : the anterior transverse impression is deep, 

 and the basal punctuation deep, the lateral margin is not strongly elevated. The elytra 

 have usually a faint greenish tinge, and are not polished : their striation is very slight 

 and the striae are not punctured. The legs and antennae are slightly longer than they 

 are in T. iinctns. Twenty-one specimens. 



Hab. Lanai. Halepaakai, July 1894, mts. Koele (Perkins). 



(3) Tliriscothorax gracilis, sp. nov. 



Piceus, vel nigricans, thoracis elytrorumque marginibus lateralibus, illorum sutura, 

 antennis palpis pedibusque testaceis ; thorace parum transverso, ad basin constricto, 

 angulis posterioribus rectis ; elytris subtiliter striatis, striis fere impunctatis, ad apicem 

 sat profundis. Long. 5 mm. 



Allied to T. unctus and similar in colour, but with a longer and more slender thorax 

 and a quite different striation of the elytra. The thorax is a good deal narrowed behind, 

 with a distinct narrow basal portion and sharply rectangular angles, the median channel 

 deep, the anterior transverse impression well-marked, the base strigose punctate ; the 

 lateral margin moderately elevated. Elytra with a faint brassy tinge, the lateral margins 

 rather broad, yellow, the fine striation rather deep at the tips, the sixth stria is obsolete 

 the other five distinct. Thirteen specimens. 



This is smaller than T. Jilipcs with a narrower thorax and with elytral striation 

 distinct at the tip. 



Hab. Hawaii. Kona, 4000 ft., September 1S92 (Perkins). 



(4) Tliriscothorax pa lu sir is, sp. nov. 



Niger, parum nitidus, antennis, palpis pedibusque fusco-rufis ; prothorace transverso, 

 lateribus rotundatis, ad basin constricto, angulis posterioribus perfectis ; elytris striis 

 quinque abbreviatis et punctatis, sutura posterius marginibusque rufescentibus. Long. 

 5 mm. 



Plate VH. fig. 3, thorax. 



Allied to T. jmctus, of darker colour, differing a good deal in oudine and readily 

 distinguished by the five distinct though abbreviated series of punctures on the elytra. 

 The thorax is much rounded at the sides, and narrowed behind, the constricted basal 

 part not short, the angles rectangular and definite ; the anterior depression deep and 

 definite, but not sculptured, the base punctate : the median channel well-marked. The 

 sutural stria of the elytra is deep at the tip, the second stria extends nearly to the tip 

 though very fine there, outside this each stria is more abbreviate ; each of the striae 

 commences as a series of punctures. The legs are dark yellow, more or less infuscate 

 beyond the femora. The margin of the elytra is distinctly red, and the same colour is 

 indistinctly present on the lateral margin of the thorax. About forty specimens. 



Hab. Molokai ; mts. May 22, 1893 (Perkins). 



