1885.1 COLEOPTERA FROM JAPAN. 207 



•J 



distinctly broader tlian long, impunctate. Elytra sliglitly wider at 

 the base than the thorax, widened towards the middle and very 

 convex, the apex more pointed, no humeral callus ; their surface 

 covered with closely approached rows of distinct punctures, the 

 latter placed rather irregularly on the striae and near the suture 

 slightly approached in pairs and distinct to the apex ; the sutural 

 margin near the apex is accompanied by an impressed line. Pro- 

 sternum broad, rugose-punctate. 



Konose. 



The shape of the thorax and elytra in this species resembles greatly 

 that of the genus Cyrtonus, with which the present insect cannot be 

 confounded on account of the presence of wings. O. templetoni, 

 Baly, is of somewhat similar shape, but differs in every other par- 

 ticular. The plain and not thickened nor impressed sides of the 

 thorax in C. cyrtonoides is another peculiarity of this species. 



Chrysomela nikkoensis, sp. nov. 



Ovate, subparallel, moderately convex, black or dark blue, shining ; 

 thorax extremely finely punctured, laterally with a longitudinal 

 basal groove ; elytra subgeminate, punctate-striate, the interstices 

 very finely punctured. 



Length 3 lines. 



Head entirely impunctate, flattened. Antennae rather less than 

 half the length of the body, the first six joints slender and shining, 

 the rest gradually dilated and opaque, black. Thorax about twice 

 as broad as long, slighilj^ narrowed in front, the anterior angles acute 

 and somewhat produced ; the disk with a few very minute punctures, 

 only visible with a strong lens, the lateral margin bounded within 

 anteriorly by a few stronger punctures, posteriorly by a short but 

 deep longitudinal groove, not extending upwards to the middle. 

 Scutellum broadly ovate. Elytra not widened behind, subquadrate, 

 each elytron with ten distinct and regular rows of punctures, the 

 first very short, the others arranged in pairs, the interstices also very 

 finely punctured. 



Nikko, Yunoshiku, Urasa. 



It is not without some doubt that I describe this species as new, 

 as several very closely allied forms occur in Northern Europe {C. 

 ordinata, Gebl., C. ambulans, Fald., 0. geminata, Payk.) ; but the 

 species from Japan seems to differ from all by the shining and almost 

 impunctate disk of the thorax, on which fine punctures are only 

 visible with a strong lens. The interstices between the double rows 

 of punctures at the elytra are finely but distinctly punctured, the 

 double rows themselves consist of strong and regular lines of punctures 

 not very closely approached in pairs. 



Chrysomela geminata ?, Payk. 



A single specimen obtained at Hakodate I must refer to this 

 species, although the colour of the upper surface, instead of the 

 general dark blue peculiar to C. geminata, is here obscure aeneous 

 with a slight violet tint. The thorax in the specimen before me is 



