Phytophagous Coleoptera of Japan. 199 



verse, contiguous ; antennas equal in length to the body, 

 sepond and third joints short, equal in length, three lower 

 joints pale fulvous, fourth and fifth piceous, the rest black ; 

 eyes large, prominent. Thorax nearly twice as broad as 

 long, sides broadly rounded at the base, gradually diverging 

 to the middle, thence converging to the apex, hinder angles 

 nearly obsolete, anterior angles armed with an obtuse 

 tubercle ; basal margin sinuate in the middle, broadly 

 rounded on either^ side ; upper surface minutely and dis- 

 tantly punctured, interspaces very finely strigose. Elytra 

 much broader than the thorax, sides obliquely divei'ging 

 from the shoulders for about a fourth of their length, 

 thence gradually converging towards the apex, the latter 

 acutely rounded; upper surface convex, rather strongly 

 and somewhat closely punctured, interspaces finely gra- 

 niilose. 



Genus TiiYAMis, Stephens. 



111. Brit. Ent. iv. 307. 



Thy amis Adams it. 



Elongata, convexa, picea, nitida, antennis, pedibus 

 quatuor anticis et tibiis tarsisque posticis pallidis ; thorace 

 lateribus fere rectis, distiucte sed tenuiter punctato ; elytris 

 ovalibus, subci'ebre puuctatis, puuctis subseriatim dis- 

 positis. 



Long. 1^ lin. 



Hab. — Matsmai, Yesso (Mr. A. Adams). 



Vertex smooth and shining, impressed on either side 

 just above the eye with several large round fovete ; encarpse 

 transverse, slightly raised, contiguous, the sutural line 

 between them obsolete ; carina linear ; antennae equal to 

 the body in length, filiform, pale piceous. Thorax nearly 

 half as broad again as long, sides nearly straight and 

 parallel, slightly sinuate behind the middle, anterior angles 

 thickened, obHquely truncate, hinder angles acute ; upper 

 surface subremotely punctured. Scutellum smooth, im- 

 punctate. Elytra oval, broader than the thorax, convex, 

 coarsely punctured, punctures (more especially on the 

 inner disk) indistinctly arranged in longitudinal rows. 



Thyamis Letvisii. 

 Elongata, convexa, fulva, nitida, pectore, abdomine, 

 femoribus posticis capiteque (antennis basi exceptis) 



