344 



MR. H.W. BATES ON FORMOSAN COLEOl-TERA. [June 12, 



violet, tinged here and therewith brassy. The hind margin of each 

 elytron, before it curves to the apex, is expanded into a thin renexed 

 lobe, the underside of which is black. 



Euchlora expansa. 



EUCHLORA CASTANEOVENTRIS. 



Oblonga, supra viridis paulo micans, infra cum pedibus fusco- 

 castaneis ; capite subrugoso-punctato ; thorace crebre punctu- 

 lato ; elytris grossius punctatis, hie illic plicatis, li?ieis longi- 

 tudinalibus distinctis. 

 Long. 8-9| lin- 



Distinguished from the allied species by the under surface of the 

 body and legs being of a chestnut hue without any trace of metallic 

 lustre, the tarsi and sometimes the tibia? being darker. The shape 

 of the body is more oblong than ovate ; the pygidium is of the same 

 green colour as the whole of the upper surface. The surface of the 

 elytra is somewhat uneven, the punctures irregular and interrupted 

 here and there with transverse wrinkles, the longitudinal lines of 

 punctures and the ribs which they form are rather distinctly marked. 



Euchlora trachypyga. 



Elliptica, vix conxexa, viridis paulo nitens, crebre cequaliter sed 

 haud grosse punctata ; thorace antice valde angustato ; elytris 

 a medio distincte angustatis, margine membranaceo latissimo ; 

 pygidio magno, fere piano, obliquo, densissime subtiliter punc- 

 tato-rugoso, opaco ; segmento dorsali penidtimo nigro ; corpore 

 subtus cupreo, pectoris et abdominis lateribus tomentosis ; pe- 

 dibus supra viridibus, infra cupreis. 

 Long. 10i lin. 



Judging from the description, this species seems to be closely allied 

 to E. albopilosa (Hope, Burin.), a Japanese insect ; but this is re- 

 presented as having distinct costse on the elytra and a hairy pygi- 

 dium : the remarkable form and sculpture of the pygidium, too, is 

 not noticed. The general form is elliptical and flattened above ; the 

 elytra are narrowed from before the middle, and from this point com- 

 mences the membranous border, which is very broad in this species. 





