the Teiiebrioniclie of Japan. .3S1 



Densely black, opaque, oblong-oval, granulate above ; the 

 head emarginate anteriorly, angles before the eyes prominent, 

 giving the head a hatchet-shaped outline; the thorax trans- 

 verse, wholly arched at the sides from one angle to tiie other, 

 bisinuatc at base ; the elytra obsoletely striate ; the antennae 

 and legs black, claws palish. 



The shape of the head is a distinctive character in this 

 species ; otherwise it is very similar to, but larger than, O.ja- 

 panum, Motsch. 



Ilah. Kob^. One example. 



Ojmtrum persimilej sp. n. 



0. Japano simillimum, sod thorace post caput scmicirculari et 



tibiis anticis dilatato-compressis. 

 L. 9 mill. 



This species is extremely like 0. japanum, Motsch., but 

 the surface-sculpture is not so coarse, the thorax has a semi- 

 circular outline behind the head, and the posterior angles are 

 small and slightly turned outwards and more acute ; the 

 anterior tibia are gradually widened from the base, a little 

 thickened on the inner surface, and emarginate at the tarsal 

 end between the point of the insertion of the tarsus and tiie 

 outer edge. In 0. japanum and all the other species of this 

 series the tarsal end of the fore tibia is cut out on the outer 

 edge ; in this species it is not. 



Hob. Miyanoshita or Odawara. 



Opatrum coriaceum^ Motsch. 



In the male the hind tibije are denticulate on the inner 

 edge, like those of 0. recticoUe. 



Hab. Yokohama (very common on the beach), Odawara, 

 and Kiga. * 



Opatrum recticoUe j Motsch. 

 Opatrum sexuale, Mars. 



There is a remarkable sexual character in this species not 

 noticed by Marseul ; the hind tibife for two thirds of their 

 length are obtusely denticulate on the inner edge. 



Uab. Kobe, Sannohe, Shirakawa, and in countless multi- 

 tudes on the plain of Fujisan in the early days of May. 



