12 
SINOXYLON CRASSUM, 
LESNE, 
Reference :—Lesne. Ann. Soc. Ent. de Belgique Tom. xli, p. 21 (1897)° 
S. coptura, Cuérin (inédit). 
Classification :—Order, COLEOPTERA. Family, Bostrichide. 
Description. 
Neither the eggs nor /arve appear to have been yet. des- 
cribed. 
The édeetle is oblong in shape, slightly dilated posteriorly) | 
entirely brown in colour and rather shining. Antennze and 
tarsi reddish brown. The elytra are strongly punctate and 
striated at their lower ends. Length 7—84 millim. See Plate 
I, fig. 2, c. S. crassum is similar in appearance to S. anale, but 
larger and more robust in build. ; 
Life History. 
The beetles appear on the wing in April in the plains of 
the Punjab: in warmer parts of the country probably in March. 
They bore into felled timber and also into stag-headed and 
weakly trees for the purpose of egg-laying, the beetles tunnelling 
their way into logs either through the bark or through one of 
the cut ends. The gallery is gnawed straight down to the sap — 
wood and the egg galleries then take off from it at an angle. 
Little indentations are cut in the sides of these secondary gal- 
leries and an egg laid in each, The larve on emerging feed 
on the wood, gnawing out short galleries in which they pupate. 
The beetles from these larve are those of the first generation 
of the year and come out of the wood towards the end of July- 
. They at once attack fresh wood in which they lay eggs which 
give rise to the beetles of the second generation which: appear 
in September-October. 
Localities from which reported. 
Specimens attacking Khair poles (Acacia Catechu) from 
the Raipur forests, obtained by Mr. F, Gleadow in July 1890, 
