466 (90) Mr. G. R Crotcli's Revision of 



Triplax japonica.* 



Triplax japonica, Crotch, Ent. Mo. Mag. ix. 189, 

 Japan (Lewis). 



Triplax collaris. 



Siljiha collaris, Schall. Act. Hall. i. 256 (1783). 



Triplax , Bed. Aheille, v. 36. 



capistrata, Lac. Erot. 217. 



France, Germany, Austria, Dalmatia. 

 At once I'ecognised by its black bead. 



Triplax sibirica, sp. n. 



Ovata, subdepressa, nigra, antennis pedibus thoraceque ferru- 

 gineis, hoc antice posticeque nigro, valde transverso, sat crebre 

 punctulato; scutello magno, nigro, fere Ifevi; elytris basi denticu- 

 lato-margiuatis, subtiliter punctato-striatis, interstitiis parce punc- 

 tatis, circa scntelhim confuse punctatis. L. H-lin. 



L. Baikal (Maack). 



The depressed ovate form conjoined with the black head will at 

 once distinguish it. 



Triplax flavicoUis. 



Triplax Jlavicollis, Lac. Erot. 218. 



, Lee. J. Phil. (2) I. Il.—Proc. Phil. vii. 162. 



, Crotch, Tr. Am. Ent. Soc. 1873, 358. 



Var. con finis , Lee. Proc. Phil. vii. 162. 



Pennsylvania, New York, Washington, Illinois, etc. 



Triplax Goudoti. 



Triplax Goudoti, Lac. Erot. 205. 

 Madagascar. 



Triplax omogera. 



Triplax omogera, Lac. Erot. 206. 

 Madagascar. 



Triplax pauxilla. 



Triplax pauxilla, Lac. Erot. 207. 



Madagascar. 



Under-side as in T. omogera. Mentura quadrangular. 



