the Teiiebrioiiidj>3 of Japan. 475 



Eucyrtus c(eruleus^ sp. n. (PI. XIII. {\j^. 9.) 



Atro-cyaneus, nitidiis ; porlibus concoloribus ; aiitennis nii^ris ; 



thorace utriii(|ue nmrjifiaato, punctato ; elytria striatu-punctatis, 



iiitorstitiis punctulatis. 

 L. l»-10J mill. 



Bluish black, legs concolorous, antennse black ; the head 

 clearly punctured, not eniargiiuite anteriorly, sides rounded 

 otf over the bases of the antennas ; the thorax margined at 

 the sides, with a very narrow rim along the edge, punctured 

 like the head ; the scutellum smooth ; the elytra striate- 

 punctate, with the interstices Hattish and distinctly punctu- 

 late, sides margined like the thorax, obtusely acuminate at 

 the apices ; the antennas, five basal joints monilitbrm, third 

 longest, sixth to the tenth wide an<l transverse, eleventh 

 circular ; the male has the anterior tibias swollen and very 

 feebly emarginatc on the inner edge near the tarsi. 



The form of the feet, antennas, and the contour of the thorax 

 and elytra of this small species resemble those of Eucyrtus 

 jjretiosus, Dej., and I have no hesitation in placing it in the 

 same genus. The structure of the sternal plates also agrees 

 in both species. The antenna is figured to show its sculp- 

 ture. 



JIah. Yuyama and Ichiuchi. Taken sparingly in the 

 moist forests on the banks of the Kumagawa in May and 

 June. 



Tetraphyllus lunuliger^ Mars. 

 Artactes Jumdiger, Mars. Ann. Fr. 1876, p. 129. 



The species of this genus are hemispherical and usually 

 found in the tropics. 



Ilah. Nagasaki, Kuraamoto, Oyayama, and Yuyama. 

 Common ; found in the spring in the centre of Kiushiu. 



Thydemus, gti\. nov. 



The head moderately large, anteriorly semicircular, fore- 

 head between the eyes nearly flat and somewhat wide ; ocular 

 ridge crosses about one third of eye ; eye lobe-shaped, upper 

 part largest. The antennas rather long and slender, basal joint 

 short and stout, second very short, third longer than the first 

 and second together; these joints are smooth, the next four 

 are very slightly shorter than the third and nearly equal in 

 length; joints 8 to 11 are as long as the third, after the tiiird 

 all are roughened. The thorax transverse, marginate, and 

 convex, narrower than the elytra ; the scutellum triangular, 



