234 MR, R. SHELFORD ON MIMETIC INSECTS AND [ Nov. 4, 
are pronounced to be fully adult by that well-known authority on 
the Orthoptera, Mr. Malcolm Burr. 
Bearing in mind the errors made by Westwood and Duponchel 
with regard to this insect, I made a careful search through the 
Sarawak Museum collection of Cicindelide, and was rewarded by 
finding yet another example of this remarkable mimic placed 
amongst specimens of Z’ricondyla gibba (Chaud.), which it most 
closely resembles as regards size, coloration, &c. The specimen 
was smaller than those described above and is evidently a younger 
stage, but it differs in hardly any other way; and 7. gibba, 
the model, also differs from 7’ cyanea var. wallacei principally 
in size (compare Plate XIX. figs. 3 & 4). 
A fourth specimen, of a very early stage, was taken in Kuching 
on the flowers of a flowering tree, frequented also by numerous 
insects of all orders, amongst others being the Cicindelid, Collyris 
sarawakensis (Thoms.), which serves as a model to the young 
Condylodera (Plate XIX. figs.5 & 6). At this stage, the insect is 
entirely dark blue, except the legs which are dark brown, and the 
greater part of the long antenne which are ochreous, the four 
basal joints only being blue. The prothorax shows no trace of the 
conspicuous puncturation of the adult, nor is it swollen as in the 
later stages, but more or less cylindrical like that of its model ; 
the wing-rudiments are not yet visible, and the auditory organ 
on the fore-tibie can only be distinguished with difficulty. The 
model is somewhat larger, of a uniform dark blue with the legs 
dark brown. It is Somewhat curious that the young Cond ylodera 
does not mimic Collyris emarginata (Macl.), a smi aller species with 
red legs, especially since in the later stages it is red-legged species 
of Cicindelide that are mimicked ; C. emarginata is, however, of 
a much more brilliant blue than any other Bornean members 
of the genus, or than the species of Zricondyla. This case of 
mimicry appears to me to be of exceptional interest and without 
a parallel. I have shown that Aymenopus bicornis, a floral 
simulator throughout the greater part of its life, mimics m 
its young stages the larve of a bug; but I know of no ameta- 
bolous insect, except Condylodera tricondyloides, which mimics 
different species of one family during the successive periods of its 
growth. 
Mimic. Gryllacris n. sp. vicinissima nigrate (Br.). 
Plate XIX. fig. 8 
Model. Pheropsophus agnatus (Chaud.). Plate XIX. fig. 7 
The model in this instance is one of the “‘ Bombardier Beetles,” 
and discharges, when seized or irritated, a jet of formic acid 
vapour quite powerful enough to scorch the skin of the finger 
severely and to leave an indelible brown stain on paper or cloth. 
The insect is quite conspicuous, being black with orange spots on 
the dorsal surface of the thorax and tegmina; the legs and 
antenne are entirely orange. The Locustid is somewhat larger, 
[6] 
