FAMILY ELATERIDAE 227 



The damage occasioned by this insect is probably to the wood alone. 



The large tree in which the beetles were taken 



Damage to Tree. was standing in a clearing, and contained a number 



of the holes made for pupating purposes by the 



grubs. Timber infested to this extent would stand little chance of being 

 disposed of at timber rates. PL xvi shows the extent of the damage 

 done. 



LUDIGENUS. 

 Ludigenus politus, Cand&ze. 



REFERENCE. Candeze, Man. Elater. iv, 236 (1863). 



Habitat. Goalpara, Assam. 



Tree Attacked. S&m\A(Bombaxmalabaricum). Kachu- 

 gaon, Goalpara, Assam. 



Beetle. Elongate, rather narrow. Black with a golden sheen 

 due to the presence of a short, rather sparse golden pubescence. 



Antennae and legs dark rufous brown. Head 

 Description. with a median depression on front ; strongly and 



finely punctate. Prothorax convex, the posterior 



and outer angles produced backwards into a point ; uniformly and finely 

 punctate. Elytra but slightly convex, depressed in humeral angles, sides 

 straight to hind coxae, and thence constricted rather sharply to apex ; 

 apices separately rounded; finely and very densely punctate. Under- Ludigenus 'polittts t 

 surface dull black ; finely reticulate. Length, 30 mm. Candeze. J Assam. 



Larva. Elongate, circular in section ; dark brown above, lighter-coloured below ; blunt 

 and rounded behind. Length, 33 mm. 



Mr. Perree and myself took two mature beetles and a few fully grown 



larvae of this insect in a large, fallen, dry semul-tree 



Life History. in the Goalpara sal forests on 14 May 1906. The grubs 



were in the outer sapwood, the beetles in pupal 



chambers in tunnels which had been gnawed deeper down into the sap- 

 wood. The grubs appear to feed in the drying bast and sapwood, or they 

 may be semi-predaceous. 



PECTOCERA. 

 Pectocera cantori, Hope. 



REFERENCE. Hope, Proc. Zool. Soc. Land. p. 77 (1*72). 



Habitat. Goalpara, Assam. 



Tree Attacked. Semul (Boinbax malabaricum}. Kachu^aon, Goalpara. 



Beetle. Elongate, narrow, the head furnished with a pair of antennae, a number of 

 whose joints aru produced into long lamellae, forming a fan ^h iprd process. HUM 



antennae are folded side by side, and n-st pressed against tin- 

 Description, abdomen of the beetle. Red-brown or dark brown in colour \\itl: 



patches of golden yellow pubescence giving a TI-\ ish app<-.n., 



to the beetle. Head deeply cleft between the eyes, finely punrtate. 1'iothor.r. l.mjcr than 



P 2 



