1914-] F. H. GravKIvY : An Account of the Oriental Passalidae. 233 



in large specimens. Prothorax and mesothorax as in A. laevicollis, hMt patch of fine 

 punctures in posterior angles of mesothoracic episterna very variable and sometimes 

 absent especially in small specimens, Posterior intermediate areas of metasternum 

 marked on same plan as in rest of genus, but very variable; lateral areas very broad 

 behind as in all the preceding species. Posterior parts of hind coxae often less densely 

 granular than in A . laevicollis . Abdominal sterna as in that species. Seventh and 

 ninth ribs of elytra almost always punctured throughout, usually densely in large and 

 more sparsely in small specimens — in the smallest specimen I have seen there are 

 very few punctures indeed on the ninth rib and even fewer on the seventh ^ ; sides of 

 elytra clothed with a more or less short ' pile which is dense near the shoulders and 

 sparse behind. 



Habits. —Mr. Kemp tells me that this form is gregarious. It was found to be 

 very common in the Abor country, boring in tough wood under moderately thin bark. 



2. A. GRANDIS (Burmeister, s. str.).'^ 



The BerHn collections include specimens from the Malay Peninsula, Bintang, 

 Deli, Tengger Mountain, Bankalan, Bandjermasin, and N. Borneo. 



Description. — Length 39-52 mm. This form and the following variety are the 

 representatives in the Sunda Islands and Malay Peninsula, of the preceding sub- 

 species. They cannot be very sharply distinguished either from one another or from 

 the northern race, as all three are highly variable. In the two southern forms, 

 however, the length of the hair on the elytra is more variable, and usually much 

 longer; the seventh rib of each elytron is always unpunctured, whereas in the 

 northern race it is almost invariably punctured, at least sparsely and often closely ; 

 and the shape of the prolongation of the left anterior angle of the head seems to be 

 more constant. In the present form this angle is always at least moderately long, in 

 large as well as in small specimens, and is always curved inwards, as in the specimen 

 of the northern race shown in fig. 28. 



3. A. GRANDIS var. RECTIDENS, Kuwcrt.' 

 PI. xii, fig. 30. 



The Sarawak Museum collection includes one specimen from Sarawak ; and the 

 Berlin collections specimens from the Malay Peninsula, Solok, Tebing tinggi and Java. 



Description. — Length 47-54 mm. Resembles the preceding in all points except 

 the following : upper tooth of left mandible always simple and acute , never bifid or 

 with the upper margin- convex and bent over inwards as it usually is in .4. grandis, 

 s. str. and sub-sp. hirsutus; prolongation of left anterior angle of head often moder- 

 ately long, but as a rule shorter than in A. grandis s. str., directed forwards or slightly 

 outwards, never curved inwards. 



' The sev'enth rib is unpunctured in most of the Hainan specimens, and in occasional ones from 

 other localities ; the density of the puncturing is very variable even in specimens all of the same size. 



''■ The hair is very short and close in all the Chinese, Himalayan and Assamese specimens I have 

 seen, but is more variable in those from Tonkin and Burma. 



- See below, p. 322, last paragraph of footnote 2. 



