194 Memoirs of the Indian Museum. [Vol. Ill, 



Pleurariinae; pp. 213 



& 279. 



ACERAIINAE ; pp. 215 & 



280. 

 MACROtlNlNAE; pp. 24O 



&293. 



4. 



Gnaphalocneminae; pp. 

 246 & 297. 



Memoirs of the Indian Museum. 



(Only three antennal lamellae recognizable when antenna is furled ; 

 ridge joining inner tubercles absent 

 More than three antennal lamellae recognizable when antenna is 

 furled ; ridge joining inner tubercles present 



{Supraorbital and supra-occipital ridges discontinuous .. 

 Supra-orbital and supra- occipital ridges continuous ' . . 

 'Inner tubercles situated behind outer tubercles ; ridge joining them 

 not forming anterior margin of head; more thaa three antennal 

 lamellae recognizable when antenna is furled 



4/ Inner tubercles situated between outer tubercles on anterior margin 

 of head, the middle part of which is formed by the ridge joining 

 them; only three antennal lamellae recognizable when antenna is 

 furled .. .. .. .. .. .. Leptaulacinak ; pp.251 



& 302. 



The first of these subfamilies, the Pleurariinae, contains only one Oriental 

 genus, Pleur arins. This genus has been grouped by Kuwert with the genera Ninoides, 

 Pertinacides and Epipertinax, all of which are confined to the New World. I have 

 not seen specimens of any of these genera, so am not in a position to criticize his 

 opinion. 



The next three subfamilies comprise between them the Macrolininae of 

 Kuwert, together with all the groups which fall under the second number "ga" of 

 his table (1896, p. 219), which is trichotomous at this point. 



The definition of the Macrolininae given in the above key necessitates the 

 removal, from the group to which Kuwert applied this name, of the genus Episphenus 

 and one oriental^ species of the genus Tiberius, since these have no scars on the men- 



ius canton the mentum bears ridges which somewhat resemble the margins of primary scars and are 

 perhaps homologous with the margins of secondary scars. The form of these ridges is, however, quite 

 unlike that of the secondary scars of any species of Gnaphalocneminae ; and the form of the anterior 

 margin of the head is in itself sufficient to show that the insect does not belong to any genus of that 

 subfamily. On the other hand, the primary scars are sometimes so feebly impressed in the genera 

 Cetejus and Analackes, that it is possible they may sometimes be absent, in which case it would be 

 almost impossible to separate certain species from the genus Episphenus The fact is that these three 

 genera are none of them, probably, very remote from the common ancestor of both subfamilies, 

 although the countries inhabited by the last are so widely separated from those inhabited by the first 

 two (see below pp. 313-5). The mentum of the genus Hyperplesthenus, Kuwert, which has only 

 secondary scars and these not of very large size, closely resembles that of the genus Episphenus. The 

 lateral and intermediate areas of the metasternum are, however, fused as in all other genera of the 

 Hyperplesthenus group, a fusion which is not known to occur in any genus of Aceraiinae. See also 

 appendix III, p. 326, below. 



^ See also p. 183, footnote. 



^ The so-called African species, Tiberius caff er, must also go. M. Oberthiir has shown me the 

 type, which proves to belong to an Austrahan species, identified by comparison with the British 

 Museum collection as Pharochilus dilatatus, Dalm. 



