1925 ] Mystery of “ Trilobite Larvce” Definitely Solved 145 
to the Bureau of Science, Manila, and think that there are at 
least three different fairly closely related types or species rep- 
resented. They all come from the island of Mindanao. The 
only hope of solving the identity of the species would be to send 
a trained entomologist to the island with strict orders not to 
return before he has endeavored to breed them out. 
General Discussion of the Development of Lampyrid^e, 
DRILIDiE, TELEPHORID.E AND LyCID^E. 
Of these four families, forming the group of the Malacoderms 
(s. str.) the Lampyrids show a marked tendency to develop 
larviform females, the retrograde development being confined 
chiefly to the elytra and the wings. All degrees of reduction 
seem to be represented, from females exactly like the males with 
fully developed elytra and wings down to entirely apterous 
larviform females. 
It is of interest to note that a reduction also seems to take 
place in some of the males. But all males have wings except in 
the genus Phosphcenus, where the elytra are reduced to small 
rudimentary lobes, the wings entirely absent. 
All Lampyrid-females pass through a normal pupal stage 
and the imagines are characterized by possessing well developed 
antennae, compound eyes, two claws, etc. No traces of hyper- 
metamorphosis can be found. 
In the family Drilidae conditions are practically the same, 
though slightly more complicated. The larva in its first stage is 
quite different from the so called ‘ ‘inactive form” or second 
stage, which is more like the pupa and therefore has been termed 
“pseudopupa.” 
According to Grawshay (Trans. Ent. Soc. Lond. 1903., pp. 
39-51.) “the winter form into which the undeveloped larva 
changes about the middle of September, or often earlier, as 
stated, is incapable of feeding or of more than a heavy grub-like 
motion, when disturbed. In general outlines it much resembles 
the ordinary form of larva but it rather perhaps deserves the 
term “false pupa.” The setae are absent, the body being almost 
entirely soft, of whitish color and except on the last three or 
