Memoirs of the Indian Museum. 



[Vol. Ill, 



i5< 



/ Central tubercle of head free, directed forwards 



I Central tubercle of head normal 



( Secondary scars widely separated 



I Secondary scars not widely separated, directed inwards so that 



I their posterior ends nearly meet in luiddle-line without reaching 



. posterior margin of mentum ; antennae normal ; left outer tubercle 



truncate or complex, right similar or simple and bluntly pointed ; 



pronotal scars with or without hair 



Antennae normal ; outer tubercles variable, simple or complex, not 

 markedly asymmetrical ^ ; pronotal scars hairless 



i Antennae with lamellae of last four joints abnormally long and 

 slender, left outer tub;rcle broadly truncate, right more or le.ss 

 pointed but no longer than left ; pronotal scars hairy 

 TOuter tubercles simple, very variable, acute or truncate, highly 

 I asymmetrical (that of the right side being always the larger) or 

 I almost ( ? sometimes quite) symmetrical 



At least one of the outer tubercles comple.K, or truncate with an ad- 

 ditional tubercle between itself and anterior angle of same side of 

 head 



'Secondary scars united in middle-line bahind, together forming an 

 ou-shaped depression much as in Omegarius ; anterior lower tooth 

 of right mandible small but distinct 



[Aiireliiis, Kuwcrt 



Secondary scars completely separated as a rule, anterior lower tooth 

 V^of right mandible absent 

 Outer tubercles equal ' 



i6./ Outer tubercles unequal, that of right side always larger than that 

 of left 



[Hypt-rplcsl/toi IIS, Ku- 

 wcrt'^]. 



[Kaiipiolus, Zang* 



(= I'ellejiis, Kaup)j. 



[Ldhicniis, Kaup]. 



[Plestheniis, Kaup ( = £")i 

 hryiilciis, Zang ■)]. 



{Giiiiphalocncmis Grou])) 

 15- 



Parapelopidcs, Zang ; 

 pp. 24() & 297. 



..16. 



Tnipczuchiliis, Zang; 



pp. 247 & 297. 



Gnaphalooiemis,' Heller ; 

 pp. 248 & 298. 



' The genus Aurelins, specimens of which I have myself examined, possesses all the characteristics 

 of the Hy pcrplesthenus group. 



^ The genus Hyper plestheniis does not appear in Kuwert's table for the determination of genera 

 (1896), being described, apparently for the first time, in 1898 (p. 318) in the description of H. impar, 

 Kuwcrt, without any separate generic definition. An examination of the type specimen has enabled 

 me to define the genus more precisely, and to find that Lrt/j!'c»;/s gracilis, Heller (Abh. Mas. Dresden 

 xiii, 3, p. 16), of which I have also seen the type, is really a Hypcrplesthenus. See Mitt. Naturhist. 

 Mus. Hamburg XXX, 1913, p. 105. 



« Kuwert says always asymmetrical, but they are symmetrical in his figure and in the majority of 

 specimens before me. 



* Kaupiohis irigonophoriis, Zang, as Zang himself suspected, is not a true Kjiipioliis, and I have 

 made it the type of a new genus Kaiipioloidcs (see above, p. 200). 



' Zang considers the name Plestheniis to be preoccupied by Pleslhenes, Stal. 



' Not alway.^^ quite symmetrical in structure however : so it is possible that the genus Trapezochilits 

 will eventually have to be merged in Gnaphalocnemis. 



"^ Kuwert I189G, p. 229) states that there is always a depression between the left outer tubercle 



