286 Memoirs of the Indian Museum. [Vol. IIIj 



{Leptaulax orolieus + Aceraius inaequalis, Getnminger and Harold, 1868, pp. 970 and 972.) 



Leptaulax orolieus, Kaup, 1869, p. 40. 



Basilianus inaequalis, Kaup, 1871, p. 56. 



Basilianus '\ inaequalis , Stoliczka, 1873, p. 159. 

 {Basilianus inaequalis, Wytsman, 1884, p. 336.) 

 {Basilianus inaequalis, Kuwert, 1891, p. 164.) 



Basilianus "f sinkepicus, Kuwert, 1898, pp. 339-340. 

 {Basilianus inaequalis, Zaag, 190 3&, pp. 418-9.) 



Ophrygonius ^quadrifer, Zang, 1904a, pp. 697-700, text-fig. 3. 



Ophryonius -f inaequalis, Zaug, 1905a, p. 192. 



Basilianus sinkepicus, Zang, 1906a, pp. 177-183. 



Ophrygonius f inaequalis, Gravely, above, pp. 227-22S, pi. xii, ûgs. 24-243. 



Kuwert gives 36 mm. as the length of his Basilianus sinkepicus ; but I have seen 

 specimens ideatiSed by himself, and found the biggest of them to be only 27 mm. 

 long. 



Localities: — 



Malay Peninsula: Penang ; Perak; Johore; Singapore. 



Sumatran Islands : Sinkep Island. 



Sumatra: Deli. 



Java. 



Borneo. 

 ? Philippines. 



The sub-family to which this species belongs is so abundant in the Oriental 

 Region right up to Wallace's Line and seems to stop so abruptly there, that I am 

 inclined to regard Burmeister' s ''MoUucca" record as a misprint for "Malacca" (see 

 also Kaup, 1871, p. 56). 



Genus ACERAIUS, Kaup (1868) 1871. 



= Ocythoe [part], Castelnau, 1850; incl. Heterochilus, Kuwert, 1896 = Rhipsaspis, 



Zang, 1905. 



Kuwert' s classification of this genus is extremely unsatisfactory, for it is based 

 primarily on variable characters. The order in which the species are arranged here is 

 based primarily on the form of the upper margin of the left mandible which, though 

 not always quite constant, is the best group character that I have been able to 

 find. 



The genus is common throughout the Oriental Region east of the mouths of the 

 Ganges and Brahmaputra, and is probably not found elsewhere. It is doubtful 

 whether it occurs in the Andamans or Nicobars. 



Aceraius wallacei (Kuwert). 



{Heterochilus criniius, Kuwert, 1891, p. 166.) 



Heterochilus -f wallacei -\-crinitus + oculitesselatus, Kuwert, i8g8, pp. 354-5- 

 Heterochihis "f wallacei, Zang, 1905a, p. 167. 

 Aceraius f wallacei, Gravely, above, pp. 228-229, pi. xii, figs. 26-265. 



