400 H. W. BATES 



Sp. Gén., I, p. 279 (nee Wiedm.) ; Chaud., Ann. Soc. Ent. Belg., 

 XIV, p. 112. 



Karin Gheba, alt. 900-1100 m. ; Bhamò. Also Bengal and 

 Cochin China. 



The margination of the prosternum on which Chaudoir founds 

 one of his principal subsections of the genus is clearly variable 

 in this species. The apex of the prosternum has in many exam- 

 ples a sharply defined margin on the same plane as the sur- 

 face of the prosternum, some have a similar margin lower 

 down the declivous apex, in others the margin is ill-defined, 

 and finally numerous individuals show no trace of margin. The 

 series of specimens which I have studied from India and Burma, 

 at the same time show no other important differences. The 

 strength of the impressed strigae on the head and thorax varies 

 much and often there are no traces of punctures on the latter. 

 The size varies from 13 to 20 millim. 



361. Orthogonius quadricoilis, n. sp. 



0. puncticolli (Wiedm.) afiinissimus ; dififert praecipue thorace 

 subquadrato. Elongatus nigro-nitidus, elytris thoracisque margi- 

 nibus lateralibus castaneo-rufis. Caput haud diversum. Thorax 

 latior, mox ab angulis anticis rotundato-dilatatus, a medio usque 

 ad basin lateribus subparallelis ; disco fere laevis, punctis non- 

 nuUis antico et postico perspicuis. Elytra sicut in 0. puncticolli 

 interstitiis aequalibus 3.'° 5.*° et 7.™° sparsim subseriatim punc- 

 tatis; apice sinuatim truncata, prope suturam oblique breviter 

 trunculata angulo suturali dentiformi. Prosternum marginatum. 

 Antennae thoracem panilo superantes. Tarsi articulo 4.*° bilobato: 

 ungues omnes pectinati. — Long. 17-19 millim. 



Karin Chebà, alt. 900-1100 m.; Palon (Pegu). 



Notwithstanding the different facies due to the subquadrate 

 outline of the thorax (which is gradually and curvilinearly nar- 

 rowed to the front in 0. pimcticollis) this form can scarcely be 

 more than a modification of 0. puncticollis, an example of which 

 from Bhamò already shows a tendency to the more abrupt cur- 

 vature behind the anterior angles. 



