1909 JOURNAL, NATURAL HIST. SOCIETY OF SIAM Vol. I. 
also undetermined, which belong apparently to the same species, hence 
it is very desirable that the male be ascertained and the identity of the 
species established. 
In this case the requisite information may be obtained in 
various ways, either by rearing the larva and breeding the male beetles 
from them, or by catching the male beetle when it comes to pair with 
the living female and forwarding both insects for identification.* 
Both these methods may require a little patience, but in neither case 
are the difficulties likely to be insuperable. 
As regards the first method, the first step is to be able to dis- 
tinguish the larva from the perfect female, for the resemblance between 
the two is very close. 
The most ready means of distinction lies perhaps in the legs ; 
in the larva these are short and pointed, almost conical, terminating 
in a single stout claw, while in the female beetle they are rather 
longer and more slender, the different sections being articulated 
at an angle, and the last section, the foot or tarsus, being composed of 
five (or perhaps only four or three ) minute joints, the last of which 
terminates in two slender claws. 
If the specimen found prove to ke a larva, it should feed, judg- 
ing from the analogy of the better known species of this group, on 
small snails and slugs, and if kept moist with a plentiful supply of 
food, should complete its transformations without much trouble. 
A small tin box with a tightly fitting lid, half filled with fine 
earth, makes a convenient breeding cage, and is easily cleaned 
and kept free from mould. When full grown the larva will remain 
quiescent for a few days, lying on its side and taking no food ; it will 
then cast its skin and become a pupa; this is at first white, but 
gradually becomes darker, the change showing most quickly and most 
completely in the eyes. Ifthe pupa is to produce a male beetle, the 
rudiments of wings will now be visible at the sides of the body, but if 
it is to produce a female beetle there will be hardly any noticeable 
change from the form of of the larva, except in the limbs which now 
are fixed and motionless. A few days in this state should be sufficient, 
then the pupa will in turn cast its skin and the perfect beetle 
emerge, 
* In the case of specimens captured én cop. particular care should be taken 
that the pairs are kept together and confusion with other specimens avoided. 
