FAMILY PASSALIUAE 



67 



Leptaulax. 



Leptaulax darjeelingi, Knw. 



Reference.— Kinv. Nov. Zool. v, p. 298 (1898). 



Habitat. — Darrang, Goalpara, Assam. Also reported from Mungphu; 

 Tenasserim. 



Trees Attacked. — India-rubber {Ficiis elcistica) : Charduar Rubber Plan- 

 tations, Darrang; Sii\ {Shorea robiida), Sexr\\A{Bombaxmalabaricum): Goalpara. 



Beetle. — Moderate size, black, shining. Head fiat, dorsal surface elevated in a number of 



prominent irregular pointed tubercles ; mandibles prominent, ending in two teeth. Protho- 



rax square, convex, shining, a rather deep median longitudinal 



Description. depressed line not reaching to anterior or posterior edges ; a circular 



punctate depression in the outer anterior angles ; the lateral edge 



punctate. Elytra l)luntly constricted apically, striate-punctate, the outer striae and punctures 



most prominent. Under-surface brown, shining, the sides of abdomen punctured. Length, 



20 mm. to 28 mm. 



I took a number of these beetles from the interior of a 



felled dead stem of a rubber-tree in the 



Life History. Charduar Rubber Plantation on 8 April 



igo6. 

 The larvae were feeding in the soft deca}ing wood, and 

 the beetles, which were fully mature, were apparently oviposit- 

 ing in the wood beneath the bark. 



A few weeks later Mr. W. F. Perree and myself took 

 numerous specimens of this beetle in the dead tops of large fig. -^j,.—Leptau- 

 felled trees, in the Goalpara Sal Forests, in April and Ma}'. If^' darjeelingi, 

 Subsequently we took numbers in a decaying fallen semul- Assam. °^ ^^^^' 

 tree of great size, in the Kochugaon forests. 



Mr. Perree was under the impression that he had taken the beetle in sal 

 wood amongst piles of sleepers, but at present this surmise has not been 

 substantiated. 



Leptaulacides, 



Leptaulacides roepstorffi, Knw. 



Reference. — Knw. Nov. Zool. v, p. 288 {1898). 

 Habitat.— Andaman Islands. 

 Tree Attacked. — Species unknown. 



Beetle.- Small. Reddish-brown, shining, prothorax darker. Head set with corrugate 

 imbrications. Prothorax flat, very shining, anterior edge concave, posterior convex, a median 

 longitudinal depressed line and a small depressed pit on lateral 

 Description. margin one-third up from posterior edge. Elytra conjointly con- 

 stricted apically, striate, the interstrial spaces flat and shining. Under- 

 surface brown, shining. Length, 15 mm. to 19 mm. 



This beetle is reported to be common beneath the bark of rotting tree- 

 stems in the Andaman Islands. No information is at present available as 

 to the species of tree it infests or as to the habits of the insect. 



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