Phytophagous Coleoptera of Japan. 99 
piceous. Thorax more than tmce as broad as long ; sides 
rounded, obliquely- converging before the middle ; disk 
transversely convex, transversely depressed in front of the 
scutellum, strongly impressed with large piceous punc- 
tures ; on the disk is a large, ill-defined, pitchy-black 
marking, often interrupted, which resembles somewhat 
the capital letter M. Scutellum black, its disk flavous. 
Elytra not broader than the thorax, parallel, sides slightly 
lobed at the base ; above convex, deeply impressed with 
round pitchy-black punctures, which are arranged in 
irregular longitudinal rows; the interspaces towards the 
apex, where the stride become nearly regular, are slightly 
convex ; the suture is edged with a very narrow black 
line. Tarsi more or less stained with fulvous. 
