the Tenebrionida; of Japan. 393 



tcllum feebly punctulate ; the elytra rather lonj^, parallel at 

 the sidi'S, stron;,'ly puiictate-striate. The hind tibiie of the 

 male are bent, basal half slender, tarsal end from the middle 

 enlarged. 



The form of the hind tibiaj agrees somewhat with that 

 of the intermediate tibias of Platydeina jimbratum, Mars. 

 There is an undescribed species in the British Museum from 

 Singapore which resembles it closely ; the absence of the 

 armature on the head of the male in this species does not 

 seem to me sufficient to exclude it from Ischnodactylus. 



JIab. Oyayama. Three specimens. 



Plaiydema mgroceneunij Motscli. 

 Platydema mttsivumf Harold, 1878. 



This species closely resembles P. Dejeanii, Cast., both in 

 size and colour. Harold, in redescribing it as P. niusi'vum, 

 laid great stress on the elytra being " striato-punctatis," but 

 in a long series of specimens half of them have the elytra 

 punctatc-striate. The armature of the head of the male is 

 usually two tubercles, but sometimes there are two pointed 

 but not slender horns. The colour of the epipleurse is some- 

 times seneous, sometimes reddish. 



Ilab. ^ikko, Miyanoshita, Kiga, and Oyayama. Common. 



Platydema Dejeann, Cast. 



I have a series of examples which agree precisely with 

 Siberian specimens referred to this species by Reitter and 

 others. 



Bab. Junsai, Sendai, and Nikko. Commonest ia the 

 north. 



Platydema Marseuli, sp. n. 



Platydema nigroceneum^ Mars., 1876. 



Oblongum, a^neo-nigrum, nitidiira ; elytris distincte punctato- 



striatis ; antennis pedibusque obscure bninneis. 

 L. 4i-5 mill. 



Oblong, greenish or brassy black ; the head and thorax 

 rather closely punctulate ; in the male are two frontal horns, 

 straight and pointed in well- developed specimens, in others 

 the horns are reduced to two obtuse tubercles ; the elytra 

 distinctly punctate-striate, interstices rather flat and finely 

 punctulate, and usually more brassy in colour than the 

 thorax; the antennas and legs are uniformly an obscure 

 brown. 



Ann. & Mag. N. Hist. Ser. 6. Vol. xiii. 26 



