9^ 



322 Memoirs of the Indian Museum. 



I Canthus without any upwardly directed tubercle .. 

 8^ A stout erect tubercle arising from dorsal surface of canthus 



I immediately in front of eye 



'At most 34 mm. long; anterior angles of head scarcely more 

 prominent than in A. illegalis, somewhat variable; apparently 

 confined to the Malay Peninsula and Archipelago, and the 

 Philippines 



At least 33 mm. long, specimens from the Malay Peninsula 

 and Archipelago always much bigger than this; anterior angles 

 of head often strongly produced forwards, especially in small 



"^specimens 



I Specimens at least 43 mm. long; right outer tubercle rounded 

 or obsolete except in one species always over 47 mm. long . . 

 Specimens at most 40 mm. long; right outer tubercle always 

 more or less distinct and pointed 



Right outer tubercle distinct; ridge between lateral and inter- 

 mediate areas of metasternum obtuse, rough ; tenth rib of 

 elytra punctured and hairy anteriorly . . 



1 Right outer tubercle more or less obsolete; ridge between 

 lateral and intermediate areas of metasternum acute, polished; 

 tenth rib of elytra usually hairless and unpunctured 

 Supra-orbital ridges and inner tubercles normal ; right outer 

 tubercle not completely absent 



Supra-orbital ridges with the apical angle very strongly deve- 

 loped, and situated on inner side of, rather than behind, the 

 anterior truncation ; left inner tubercle situated on inner side 

 of base of left outer tubercle ; right outer tubercle missing . . 



[Vol. Ill, 



A. occiilidens, pp. 234 & 290. 



A. laevicollis, pp. 230 & 287. 



A. grandis"^, pp. 231 & 288. 



A. laniger, pp 234 & 290. 



.4. kiiwerti, pp. 235 & 290. 



A. iricornis, pp. 235 & 290. 



' These distinctions are much more definite in reality than might be supposed. Out of the several 

 hundred specimens I have examined I have only been in doubt as to the identity of one; and as this was 

 from Tonkin, where A. grandis is known to occur not infrequently, and .4. laevicollis has never been 

 found, it must I think have belonged to the former species. 



* Occurring under three (? or four) imperfectly differentiated forms: — 



A. Northern race, confined to continental Asia north of the Malay 



Peninsula, the Philippines, Formosa, etc. Seventh rib of 

 elytra usually strongly punctured, rarely without punc- 

 tures; hair on elytra always quite short in specimens from 

 Assam and the Himalayas, inclined to be longer in speci- 

 mens from Burma and Tonkin ; shape of head very variable 



B. Southern race, confined to the Malay Peninsula and Sunda 



Islands. Seventh rib of elytra never punctured ; hair very 

 variable in length, usually longer than in the northern 

 race. Occurring in two forms :— 



a. Anterior angle of left side of head at least moderately 



prolonged and curved inwards 



b. Anterior angle of left side of head at most moderately 



prolonged, directed outwards or forwards 

 ?C. Chinese race with elytra like those of the southern race 

 [Mr. Arrow tells me that Burmeister's type resembles recfidens 



sub-sp. hirsutus, Kuwert. 



A. grandis, Burmeister, s. str. 



var. rectidens, Kuwert. 

 sub-sp. chinensis, Kuwert 

 I this case the form here and 



throughout this paper called grandis, s. str., becomes var. addendus, Kuwert ] 



