FAMILY ELATE RI DAE 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. PI. xvi shows the extent of the damage 



done. 



LUDIGENUS. 



Ludigenus politus, Candfeze. 



Reference. — Candeze, Mon. Elater. iv, 236 (1863). 



Habitat. — Goalpara, Assam. 



Tree Attacked. — Semul [Bombax nialaharicum). 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; p,,; ,^g 



apices separately rounded; finely and very densely punctate. Under- Liedigciiiis politus, 

 surface dull black ; finely reticulate. Length, 30 mm. Candeze. \ 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, dr}' semul-tree 

 Life History. in the Goalpara sal forests on 14 May igo6. 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. 



Pectoceka. 

 Pectocera cantori, Hope. 



Reference. — Hope, Proc. Zool. Soc. Land. p. 77 (1872). 



Habitat. — -Goalpara, Assam. 



Tree Attacked. — Semul (Bombax malabaricnm). Kachugaon, Goalpara, 



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



whose joints are produced into long lamellae, forming a fan-shaped process. These 



antennae are folded side by side, and rest pressed against the 



Description. abdomen of the beetle. Red-brown or dark brown in colour with 



patches of golden yellow pubescence giving a greyish appearance 



to the beetle. Head deeply cleft between the eyes, finely punctate. Prothorax longer thaa 



P 2 



