546 FAUNA HAWAIIENSIS 



This insect has much the aspect of a Lithocliaris, but the prothoracic side-pieces 

 are enlarged behind so as to conceal the stigma. The head is subquadrate, the hind 

 margin straight, not emarginate in the middle. The thorax is nearly as long as broad, 

 a good deal narrowed behind, very finely and densely punctured, with an extremely fine 

 channel along the middle. The elytra are densely and finely punctured and are longer 

 than the thorax. The hind margins of the segments of the abdomen and the tip are 

 reddish. 



The unique example is a male; the front tarsi are a good deal dilated; the last 

 ventral plate is notched in the middle. This is strongly difi"erent from iuconiptns by 

 the longer prothorax. 



Hab. Kauai, Makaweli, 2500 ft. 11. 1S97 (Perkins). 



Nesomedon, o;en. nov. 



Mandibulae elongatae, bidentatae et unidentatae, palpi maxillares articulo ultimo 

 fortiter dilatato. Tarsi breves et crassiusculi, anteriores leviter dilatati. 



The genus is nearly allied to Mcdoii as exemplified by J/, bniiniciis, but I think 

 should certainly be separated. The prothoracic epimera are largely developed. The 

 eyes are very small. The type of the genus and the closely allied N. oahuensis are 

 apterous, but I have for the present associated a form — N. qiiadratus — with them, that 

 is winged. The genus differs from Opkioiiiedon, by the coarse sculpture, the more 

 rounded head with smaller eyes, and — in its typical species — by the very short meta- 

 sternum, and the absence of wings. The left mandible is armed with one sharp tooth, 

 the right mandible with two. 



(1) Ncsoincdon bniiincsccus, sp. nov. 



Rufo-brunneus, palpis pedibusque testaceis ; capite thoraceque dense fortiter 

 punctatis, hoc medio tenuiter canaliculate; elytris brevibus, scabroso-punctatis; abdomine 

 pubescente, dense punctato. Long. 4^ — 5 mm. 



Plate XVI. fig. 23. 



Antennae somewhat infiiscate, rather short, 2nd and 3rd joints subequal in length, 

 9th — nth joints slightly broader, the loth about as long as broad, i ith small, oval. 

 Head subquadrate but with the hind angles much rounded, scarcely broader than the 

 thorax, coarsely and very densely punctured. Thorax slightly narrowed behind, with 

 the angles much rounded, less densely punctured than the head, and with a fine channel 

 along the middle that does not extend to the front. Elytra shorter than the thorax, 

 contracted at the base, with dense, rough, not coarse sculpture. Wings absent. 

 Abdomen densely punctate. 



The sexual distinctions are slight; in the male the front tarsi are a little broader, 

 and there is a small emargin<ition of the hind margin of the last ventral plate. 



