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IV. The Larva of Collyris emarginatus, Dej. By R. 
SHELFORD, M.A., F.L.S. 
[Read March 6th, 1907. ] 
Prars, d TT, 
Iv Dec. 1905 I exhibited before this Society some speci- 
mens of the wood-boring larva of the Tiger-beetle Collyris 
emarginatus, Dej.,and made some remarks thereon, which 
are published in the Proceedings of date Dec. 6th, 1905. 
It is to Dr. J. C. Koningsberger of the Zoological Museum at 
Buitenzorg, Java, that we owe the discovery of this very 
interesting larva. From a brief description of its habits 
published in “Mededeelingen uit’Slands Plantentuin,” 
vol. xliv, p. 113, 1901, we learn that the larva excavates a 
burrow in the twigs of coffee-shrubs and that it feeds on 
the ants and aphides which crawl over the entry to the 
burrow ; pupation takes place in the burrow. No adequate 
figure of the larva and no account of its external features 
have yet been published, but I am now enabled to supply 
some information on these points, thanks to Dr. Konings- 
berger, who has most kindly sent me two consignments of 
larve. I gladly seize this opportunity of recording my 
gratitude to my generous correspondent. 
The burrows occupied by the larvee of Collyris emarginatus 
are situated in the central pith of twigs of not more than 
5 mm. in diameter ; the woody part of the twig does not 
appear to be attacked at all. The burrow is generally half 
as long again as the larva occupying it, so that there is 
room for to-and-fro movements of the occupant. Close to 
the anterior end of the burrow is a small circular orifice 
passing through the woody tissue of the twig and placing 
the burrow in communication with the outer world; the 
outer margin of this orifice is raised, so that the entry to 
the burrow appears to be countersunk. This raised margin 
is brought about by the swelling of the bark of the twig 
at this point, —a pathological result of its puncture. 
TRANS. ENT. SOC. LOND. 1907.—PART I. (JUNE) 
