464 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 99 



the raised median part yet more so. Antennae long and slender ex- 

 tending to the base of the elytra, all the segments longer than broad. 

 Thorax as long as broad, widest at the middle, the sides gently rounded 

 in front, straighter and more retracted behind, with median more 

 shining sulcus not extending to the anterior or posterior borders, the 

 sculpture coarse rugose and vermicular. Elytra longer than the thorax 

 (4.5:3.2), broader than long (5:4.5), uneven, with coarse close ver- 

 micular rugae forming a rosette. Abdomen elongate and cylindrical 

 as in Hyposteims^ but the segments finely margined, rather coarsely 

 and closely punctured on the first two visible tergites more finely on the 

 following with fine coriaceous ground sculpture and fine pubescence. 

 Foreparts without ground sculpture or pubescence. Male, second 

 to fourth sternites broadly flattened along the middle ; fifth broadly 

 and deeply impressed on the posterior half; sixth with rectangular 

 emargination of the posterior margin. Length, 6 mm. 



Type locality. — Formosa, Arisan. 



Types. — Holotype and one paratype, U.S.N.M. No. 58736; one 

 paratype in my collection ; VI— 4-32. 



69. STENUS (HEMISTENUS) SHARPIANUS Cameron 



Zoc«?^7^e5.— Japan, Tokyo (XI-5-30) ; Formosa, Musha (V-20-32), 

 Arisan (V-25-34). 



70. STENUS (HEMISTENUS) sp. 



Localities. — Formosa, Arisan (VI-4-32). 



71. STENUS (HYPOSTENUS) SUBTROPICUS. new species 



Shining black. Antennae and legs reddish yellow. Much like 

 tropicus Bernhauer in build but with narrow head, longer entirely 

 testaceous antennae, and less coarse puncturation throughout. Head 

 as broad as the base of elytra, the eyes large, the disc flat, closely and 

 coarsely punctured. Antennae extending to the base of the thorax, 

 all the segments longer than broad. Thorax slightly longer than broad 

 (2.5 : 2.3) , the sides feebly rounded, broader about the middle, coarsely 

 and closely punctured like the head. Elytra broader and a little 

 longer than the thorax, broader than long (3.5: 3), the puncturation 

 similar. Abdomen cylindrical, only the first visible tergite margined, 

 closely, moderately coarsely punctured on the first three visible seg- 

 ments, more finely on the following, the puncturation much less coarse 

 than in tropicus. Ground sculpture absent on the foreparts, very 

 feeble on the abdomen. Pubescence white and corresponding with the 

 punctures on the foreparts, closer at the bases of the first three visible 

 tergites. Male, first sternite with a fine keel along the middle of the 

 basal half; second and third deeply broadly crescentically impressed, 

 the margins of the impressions raised and produced backward, densely 

 pubescent; fourth with a large simple pubescent impression at the 



