64() UKV. H. S. GORHAM ON THE ^Dec. 20, 



the eighth joints very slender and longer than wide, the three club- 

 joints lax and subequal, the apical being the largest. The thorax 

 is particularly short and broad, and witli the front and .head more 

 dechvous than usual in this genus. Its margin is flattened and 

 broad, but with the edges raised, so that its own surface is concave 

 as in S. iiiternexus. The sides narrow strongly from the base 

 without being much rounded ; the basal sulci ai-e quite distinct, 

 reaching nearly half across the disk. The elytra are very convex 

 and rather pointed behind, finely punctured, but wholly without 

 serial punctuation, rufous, with a black patch, not coming nearer 

 the base than one third of the elytral length, and not reaching 

 the margins nor apex. The underside is black, with the abdomen 

 very faintly rufous, and the legs are black. A considerable number of 

 this species were met with in the island of Kiushiu and it was also 

 found by Mr. Lewis on the Main Island at Kashiwagi. 



4. Stenotarsus nigriclavis, Gorh. Ent. Mo. Mag. ix. p. 206. 



Hab. Kiushiu : Nagasaki. 



Mr. Lewis met with three or four more specimens of this species 

 at the beginning of June 1881. With S'. musculus it will form a 

 separate section of the genus, differing from other unstriate Stenotarsi 

 iu the feeble structure of the antennae. 



EcTOMYCHUs, n. gen. 



Corpus oblongum, subparallelum, supra pubescens, subius vix ves- 



titum. Antennce breves, tenues, clava triarticulata, articulis 



duobus primis intus paulo productis. Oculi hand granulati. 



Pronotvm lateribus marginatis et deplanatis, sulcis basalibus dis- 



tinctis leviter impressis. Elytra prothoracis latitudine, oblonga, 



ad apicem conjunctim rotundata. Prosternum breve, processu 



coxas anticas vix superante, apice truncato, subriiguloso. Pedes 



breves, femora compressa ,- tarsi breviusculi, articulo secundo 



bilobato. 



I propose this genus for the reception of a small Beetle having 



very much the appearance of a Mycetophagus, but from the structure 



of its tarsi and from the margination of the sides of its thorax and 



the basal impressions evidently allied to Stenotarsus. 



1. EcTOMYCHUS BASALTS, U. Sp. 



Oblongus, niger, parce pubescens, obsolete subtiliter punctatus, 

 elytris basi rufis, antennis tarsisque rufo-piceis, illis clava nigra. 

 Long. 3 millim. 



Hab. Main Island : Kawatchi, Miyanoshita, Kurigahara. 

 Yezo : Sapporo. 



Head small, received into the prothorax ; eyes small and very little 

 prominent ; antennae short, but longer than the head and thorax, 

 basal joint very stout, second short, but equally stout, third to eighth 

 thin and short, the third about twice as long as the others, ninth 

 and tenth acuminate internally, very much larger, and apical joint 

 ovate, forming a lax but distinct club. Thorax nearly twice as wide 



