120 



FAMILY CUCUJIDAE 



with bitten pieces of their food. This insect causes considerable annual loss 

 in India, attacking mohwa, for instance, during the rainy weather and 

 breeding in it steadily till much is lost." 



Silvanus lateritius, Reitter. 

 Habitat.— Siwaliks^ North India. 



Trees Infested. — Lagerstrdinia parviflora and Erythrina suberosa. Bula- 

 wala, Siwaliks (B. Sen Gupta). 



Beetle.— Flat, elongate, narrow, brown. Head triangular, punctate ; eyes large, black, 



placed at sides near base of head. Prothorax longer than wide, narrower behind, flat ; a raised 



longitudinal median ridge on disk, with a depression on each side. 



Description. highly punctate. Elytra elongate, constricted to ape.x, where they do 



not quite cover abdomen ; strongly punctate-striate. Legs with 



thickened femora, and tibiae thickened at upper end. Under-surface darker in colour. Length, 



5.5 mm. 



Specimens of this beetle were taken from beneath the bark of dead 

 Lagerstrumia parviflora and Erythrina suberosa trees at 



Life History. Bulawala in February igo2 by Student B. Sen Gupta 



of the Imperial Forest School. 



The beetles were either hibernating or feeding on the dead cambium 

 layer. 



Silvanus advena, Walth. 



{Teak Leaf Gall Maker.) 



Reference.— Walth. Fatcnus, i, p. 169 (1832). 



Habitat. — Central Provinces, Berar, Madras, 

 Bombay. 



Tree Attacked. — Teak {Tectona grandis). Damoh, 

 Central Provinces; Melghat, Berar; Poona ; Coim- 

 batore. 



Beetle. — Elongate, very small, with clubbed antennae. Light 



brown, the elytra yellowish brown. Head flat, punctate ; eyes black, 



placed at sides. Prothorax wider than long 



Description. rather square, moderately convex medianly, 



punctate. Elytra with sides straight to 



apical third, thence constricted and conjointly rounded ; surface 



smooth, very finely punctate. Under-surface darker red-brown, 



punctate. Length, 2 mm. 



Larva.— Dark orange in colour. 



Fig. 83. — Silvanus 



advena, Walth. 



Central Provinces. 



The leaves of the teak throughout India (Central Provinces, Bombay, 



and Madras) are attacked b}' a small Silvanus grub 



Life History. whose operations cause the tissues of the under-surface 



of the leaf to swell up into a small gall. This gall 



consists of a small round yellowish lump on the under-surface of the leaf 



