374 
STROMATIUM sp. prox. BARBATUM. 
‘Reference :—Provisionally determined as Stromatium sp. prox. barbatum, 
Classification :—Order, COLEOPTERA. Family, Cerambycide 
Tree attacked :—Casuarina (Casuarina equisettfolia), 
This is the beetle whose whitish grubs have been reported as 
-committing, in company with the Arde/a, serious damage to the 
«Casuarina plantations in North Arcot, 
Beetle-—?. A somewhat elongate, narrow, lightly-built 
beetle of the usual longicorn shape, dark brown with a purplish 
“tinge often merging into a lighter shade towards the tips of the 
elytra. Antenne and legs yellow. Former not as long as body. 
No sculpture on thorax or elytra; both pitted and covered with 
a fine yellow pubescence. Abdomen yellow beneath. Length 
-seven-eighths inch (varies—may be smaller.) 
¢.—Smaller than @. Antenne longer than body. Body 
narrower and slimmer than in ¢; elytra more lightly coloured 
-on upper half. Length five-eighths inch. 
Greatly resembles Stromatium barbatum, the Kulsi Teak 
‘borer. (Vzde Injurious Insects, 75, fig. 48.) 
Life-History. 
Grubs of this insect have been found in the trees in December 
boring and feeding in the cambium layer and sapwood. In 
June beetles, said to be the adults of these larve, were 
-obtained from the trees. We do not yet know how long these 
grubs spend feeding in the tree in this stage. It is, however, 
almost certainly the greater part of a year and may be longer, 
The pupal stage is probably short. 
The damage is done by the grubs destroying the bast layer 
of the tree. When they are numerous the tree is practically 
ringed beneath the bark and dies. 
Results of attack. 
In December 1900 the Divisional Forest Officer, Mr. C. D. 
Thornton, reported that grubs, identified as longicorn ones . 
““had nearly ruined the Casuarina trees in the Anunundi 
