the Larva of Collyris emarginatus. 87 
a few strong spines (Plate III, fig. 3). The labium is cordiform, 
densely hirsute above and with a pair of short two-jointed palps ; 
the anterior angles of the basal joints of these palps are spiniform 
beneath and the tip of the apical joints is beset with numerous 
sensory pits (Plate III, fig. 4). 
The body consists of 13 segments and is seen at once to differ from 
that of a typical Cicindelid larva by the absence of a marked sigmoid 
flexure and by the absence of large dorsal tubercles armed with 
strong hooks on the eighth segment. The Collyris larva in fact 
“fits” its burrow much better than does the Cicindela larva, it is thus 
able to brace itself at the top of the burrow without pronounced 
curvature of the body ; the walls of its burrow being of a denser 
and harder texture than sand or earth accounts for the absence of 
long hooks on the eighth segment. The prothorax is as broad as the 
head ; the pronotum is trapezoidal with rounded posterior angles and 
is strongly chitinised. From the mesonotum backwards to the eighth 
segment, the segments increase in breadth. The eighth segment is 
swollen dorsally forming a hump and the hump carries two curved 
series of small hooks, each series being composed of three hooks ; the 
hooks are of a rather peculiar shape, which can best be understood 
by a reference to the Plate (fig. 5). In addition to the hooks are 
numerous stout sete; both hooks and sete are directed forwards. 
The three segments immediately behind the eighth are slightly 
narrower than it ; the twelfth segment is much narrower and shorter 
and the thirteenth segment is small and sucker-like with six short 
spines and numerous fine setze on its posterior margin. Segments 4 
to 12 bear on each side in a dorso-lateral position a mamilliform 
tubercle furnished with three sete, and a minute mamilliform 
tubercle with two setz occurs on the ventral surface of these 
segments. These tubercles and sete together with the dorsal 
armature of the eighth segment doubtless serve to brace the larva in 
its burrow. 
Of the legs the following parts can be distinguished :—femur, 
tibia and tarsus. In the second and third pairs the femur is flattened 
and plate-like, with rounded angles; the tibia is rather slender, 
about two-thirds the length of the femur and with some sete along 
its lower border and at its distal end; the tarsus consists of three 
joints, the terminal hook or claw being included as one joint ; the 
first or basal point is ringed with sete, the second has some sete and, 
in addition, on its outer aspect a blunt tooth (Plate ITI, fig. 7). The 
first pair of legs is very different in shape; the femur is flattened 
and triangular with a row of setz along its outer aspect ; the tibia 
is short and very stout, broader distally than proximally, its lower 
anterior angle is produced to form a strong and acute tooth with 
