1.918.]. F. H.. Gravely : Passalidae of the World. 115 



Selangor-Pahang boundary, Malay Peninsula (one specimen sent for examination by 

 Mr. C. Holman-Hunt) ; Hili Madjedja and G-. Madjedja, North Nias ; Kalim Bungo, Middle 

 Nias , Sumatra (Bedagei Interior, ca 600 ft. ; Beloe Lawang, Pasoeroean ; Mana Riang, 

 Palembang, 2,000-3,000 ft. ; Tandjong-Djati, Ranau, Palembang, ca. 2,000 ft. ; Kandg. 

 Ampat, Lower Padang ; Bng. Proepoe, Pad. Bovenland, ca. 1,600 ft.; Engano Island, 

 Benkoelen ; also specimens from Médan, submitted by M. Guy Babault) ; Java (Bogor= 

 Buitenzorg ; Tji Bodas, Gng. Gede, ca. 4,000 ft. ; Telega Bodas, Garoet, Preanger, 4,000- 

 5,000 ft. ; Mt. Tjikorai, 4,000 ft., Sukabumi, 2,000 ft., and Pengalengan, 4,000 ft., W. 

 Java ; G. Tji Salimar, ca. 3,000 ft., W. Preanger ; Tji Solak, Wunkoops Bay ; Mt. 

 Tengger, 4,000 ft., E. Java ; Malang) ; Borneo (Mt. Marapok ; Mt. Kinabalu ; Sarawak ; 

 Pontianak ; Doesonlanden ; i° S., 115 E. ; Banguey Island) ; Philippine Islands (Davao : 

 also specimens presented by Mr. C. F. Baker from Imugin, N. Viscaya ; Mt. Makiling, 

 Luzon ; Zamboanga, Mindanao ; Mt. Bonatao and Los Banos) ; Talaut Islands (Salibabu) ; 

 Celebes (Lompa-Battau, 3,000 ft., Tjamba and Bantimoeroeng in the south ; Menado ; Loka, 

 Bonthain) ; Halmaheira (Gilo) ; Morty ; Ternate ; Batjan (Labuan) ; Wakollo, Central 

 Buru ; Hat, Bum East Coast ; Mysol ; Kei Islands ; New Guinea (Humboldt Bay ; Kapaur ; 

 Dore; Run). Length 12-24 mm. 



In the large and representative collection now before me I find it impossible to subdivide 

 the species satisfactorily into groups distinguished by the amount of puncturing on the 

 abdominal sterna. There is, however, a marked though imperfect correlation of the extent 

 of this puncturing with the localities from which the specimens come, specimens with smooth 

 sterna being characteristic of Ceylon, the Andamans and Nicobars, the Philippines, and the 

 Archipelago east of the Sunda Islands. In specimens from Java the abdominal sterna are 

 as a rule less extensively punctured than in specimens from Sumatra and Borneo ; but 

 specimens with absolutely unpunctured abdominal sterna do occur in Borneo and in 

 small islands near Sumatra, if not actually on the mainland. 



The form of the mesosternal scars is also variable. Normally they are rounded on the 

 inner side, and are not very large ; bat in specimens from the archipelago east of Borneo 

 the inner side is usually straight, extending much further backwards. Such forms also 

 occur further west, though more rarely. Celebes specimens appear to occupy a somewhat 

 intermediate position. 



In very small specimens, from the Archipelago east of Celebes, which are usually 

 extremely flat like L. planus, the frontal ridges resemble more or less closely those of 

 L. glaber, ending behind the anterior margin of the head and usually between its inner and 

 outer tubercles ; and the marginal tubercles of often closely approximated. When a series 

 of specimens is examined, however, this character also proves to be somewhat indefinite, 

 and I am no longer able to regard L. obtusidens, Kuwert, as distinct. 



The size of the punctures in the lateral grooves of the elytra is very variable both in 

 L. bicolor and in L. dentatus. As a rule it is much smaller in the former than in the latter, 

 but the difference in the case of extreme specimens is very small. There is never any 

 difficulty ^ however, in distinguishing the two species from each other, by the structure of 

 the parietal ridges, which extend to the supra-orbital ridges in L. bicolor, but end abruptly 

 about half way between the central tubercle and the supra-orbital ridges in L. dentatus. 



q2 



