A 
396 SPH AZROTRYPES COIMBATORENSIS, n. sp. 

and a short horizontal tunnel carried down to the cambium. 
This is made by one beetle only, whether by the female 
or male has yet to be observed. On reaching the bast a 
short gallery about 4th inch long, with parallel sides, is: 
grooved out and in this two beetles, a male and female, are 
always to be found: and this is probably the pairing chamber, 
After pairing the male leaves the chamber by the hole of 
entrance and the female commences boring her egg-gallery. 
This is straight and is merely a continuation of the pairing 
chamber, and is always parallel to the longitudinal axis of the 
tree. Small recesses are eaten out on either side close to- 
gether all up this gallery, and an egg laid in each. The first eggs. 
hatch out before the female has completed her gallery and egg- 
laying, so the egg stage is evidently a short one—lasting but a 
few days at most. The female blocks up each recess with saw- 
dust after laying an egg in it, perhaps to provide a_ first mea] 
for the young newly-hatched larva, The egg-gallery is kept 
quite free of saw-dust. An examination of old galleries 
showed that the larve bore away from the egg-gallery in a radiat- 
ing manner, the pattern formed by their collective galleries 
approaching an ellipse. When full-fed the larve enlarge the 
end of their galleries and pupate in these chambers. When 
mature the beetle bores its way straight out of the tree by a 
hole through the bark. The length of the egg-gallery is £th inch 
tO 2 inches with a breadth of }thinch or less, Length of larval 
galleries $rd to 13thinch. Breadth }th at top and th inch 
at base, wherethey take off from egg-gallery. The number of 
eggs laid by the beetle averages 24, The plan of the gallery is 
very like that of P. stwalikensis shown in fig. Ic. 
I consider it probable that there are at least three genera- 
tions of this beetle in the year—and perhaps four, Some green 
Anogeissus poles felled in April and left lying in the forest 
were examined on August 6th, They were found to have 
been attacked from top to bottom by this beetle since they- 
had been felled. The insects had laid their eggs in the 
felled poles, the larva had hatched out, become full-fed, pupated, 
and emerged as beetles, All this was plainly decipherable, but 
the examination showed that, whilst the work was so recent as 
