88 Mr. R. Shelford on 
secondary teeth on the upper border, a small blunt tooth also oecurs 
at the upper anterior angle on the outer aspect; the tarsus is 
triangular, the basal joint is almost as broad as long with a blunt 
tooth on its outer aspect, the second joint also is furnished with a 
tooth on its outer aspect and both joints are beset with setze (Plate 
III, fig. 6). The second and third pairs of legs are carried with the 
femora straight out from the body, the tibia bent upwards; no 
doubt they brace against the sides of the burrow and serve to steady 
the larva when it catches some large or active insect. The front legs 
are plainly adapted for excavating the soft core of the twig in which 
the larva lives. 
In conclusion I would beg to express my thanks to Dr. 
Sharp, F.R.S., Canon W. W. Fowler, and Mr. V. E. 
Shelford of Chicago University, for the kind help and 
useful criticism that they have offered me in the prepara- 
tion of this account of a most interesting insect. 
EXPLANATION OF PLATE III. 
[See Explanation facing the PLatEs.} 
ADDENDUM. 
AFTER the foregoing account went to press, I received 
from Dr. D. Sharp a letter sent to him from Hongkong by 
Mr. F. Muir, in which Mr. Muir announces the discovery 
by himself and Mr. J. C. Kershaw of a wood-boring 
Cicindelid larva. Mr. Muir writes that the burrow “runs 
up the stem, the entrance being at the lower end. It [the 
larva] waits with its head at the entrance of the burrow 
and whenever an ant ora fly crawls up the stem within 
reach it quickly darts out its head and catches its prey.” 
Apparently only one specimen was secured, and this, with 
the piece of wood containing the burrow, Dr. Sharp has 
kindly handed to me for examination. The larva is larger 
than that of Collyris emarginatus, measuring 12 mm. in 
length, but it can, I think, be referred to the genus Collyris 
without much doubt. There are only two pairs of ocelli; the 
legs are very similar in appearance to those of C. emargi- 
