118 



Memoirs of the Indian Museum, 



[Vol. VII, 



Leptaulax humerosus, Kuwert. 



Leptaulax humerosus, Kuwert, 1898, p. 289. 



Leptaulax humerosus, Gravely, 1914c, pp. 251-252, pi. xiii, fig. 51. 



Numerous specimens from the following localities : — Perak, Malay Peninsula ; Sumatra 

 (Mana-Riang, 2,000-3,000 ft., and Tandjong-Djati, ca. 2,000 ft., Renau, Palembang ; 

 Bng. Proepoe, Padang Interior, ca. 6,000 ft. ; S. E. Serdang, ca. 1,000 ft. and Bedagei 

 Interior, ca. 600 ft., East Coast ; Beloe Lawang, Pasoeroean) ; Java (Malang ; Pengalengan, 

 S. Preanger, 4,000-5,000 ft. ; G. Gedeh, N. W. Preanger, 4,000 ft. ; Telaga Bodas, Garoet, 

 Preanger, 4,000-5,000 ft. ; G. Tji Salimar, W. Preanger, 3,000 ft. ; Tengger Mountain, 

 E. Java, 4,000 ft.) ; Borneo (Martapura and Kinabalu). Length i5'8-22*5 mm. 



Easily distinguishable from L. anna, which it resembles as regards the sculpturing of 

 the elytra, by its smaller size, by its more strongly rectangular pronotum with thickly 

 punctured sides and more or less prominent anterior angles, and by its slenderer elytra. 



The species of Leptaulax which I have been able to recognize may be distinguished 

 from one another thus : — 



The elytra polished throughout . . . . . . . . . . 2. 



1 { The depressed surface of the two or three outermost grooves 



of the elytra dull, the punctures somewhat worn-looking . . . . 11. 



The puncturing of the lateral grooves of the elytra not strongly 



transverse ; the parietal ridges united with the supraorbital 



ridges . . . . . . . . . . . . . . 3. 



The puncturing of the lateral grooves of the elytra strongly 



transverse ; or, the parietal ridges ending more or less 



abruptly about half way to the supraorbital ridges . . . . . . 8. 



The abdominal sterna covered evenly all over with somewhat 



obscure, broad, shallow punctures . . . . L. planus, p. 113. 



The puncturing of the abdominal sterna variable in extent, 

 sometimes absent, when present always finer, and when 

 extensive deeper and less uniform .. .. .. .. .. 4. 



/The marginal grooves of the pronotum extremely fine, their 

 puncturing more or less obsolete ; the sides of the pronotum 

 and the posterior intermediate areas of the metasternum 

 at most weakly punctured . . . . . . . . . . 5. 



IThe marginal grooves of the pronotum coarser, strongly 

 punctured ; the sides of the pronotum and the posterior 

 intermediate areas of the metasternum as a ride strongly 

 and extensively punctured . . . . . . . . . . 7. 



The pronotum strongly rectangular, the elytra more or less 



parallel-sided ; small insects, not more than 18 mm. long . . . . . . 6. 



The sides of the pronotum somewhat rounded, the elytra more 



or less dilated behind ; large insects, not less than 24 mm. 



long . . . . . . . . . . L. sambawae, p. 114^ 





