105 
Dr. T. A. Chapman on Calloplvrys avis. 
not declare itself in the first instar, but afterwards is 
present equally in both species and is well seen in the 
photographs of those of the second and third instars 
(Plates XXXIV and XXXV). 
In the last instar (Plate XXXVI) they are not so easily 
found, as the outer angle of the plate on which they are 
is not at all chitinised, and is, in fact, like the rest of the 
skin. I believe I am correct in saying that the red mark 
in C. avis goes far beyond the plate, but I may not have 
made enough allowance for this non-chitinisation of its 
lateral wings. In Plate XXXVI, fig. 1, the special hairs 
would be about half-an-inch outside the picture. 
So far as I know the existence of a honey-gland in the 
Thestoridi has not been previously reported. It 
certainly escaped the notice of both Mr. Tutt and myself, 
both in his researches in the literature of the species and 
my (I fear rather perfunctory) observations of the living 
larvae. There is no mention of it in Tutt’s account of 
Calkyjhrys ruhi in his “ British Lepidoptera,” vol. ix. 
I may add that I have searched for indication of the 
fans or scent (?) glands of the eighth abdominal segment 
and have not succeeded in discovering any; I incline to 
believe they do not exist, still, if they are rudimentary, 
they might be present and easily elude me. 
So far I have had no empty pupa shell of C. avis to 
mount. The only one I have mounted had to be cleaned 
by some maceration in potash, which has had the effect of 
softening the hairs and rendering them useless for de- 
scrijDtive purposes. In other respects I believe the 
specimen is trustworth}^ I believe the hairs are practi¬ 
cally identical with those of C. riiin, as the result of such 
observations as can be made on the living pupa. Nor in 
other respects have I been able to seize any decided 
differences. Both species, for example, appear to have 
structural provision for movement between the fifth and 
sixth abdominal segments. Both have the peculiarity that 
I have only discovered in Theclids of having not only the 
eighth but also the seventh abdominal spiracle merely 
cicatricial. In neither is there any scar of the honey- 
gland, present in not a few “ Blues.” 
The general characters will be better gathered from the 
few photographs reproduced than from long descriptions 
(Plates XTX, XXXVIll, and XLIII). 
P.S.—A few further notes will be found in Proceedings 
O 
