(es sexexat 1!) 
see nothing but an ordinary-looking, although very active, 
Coreid bug. While still watching it running about the net, 
the bug opened its wings to take flight, and exposed the 
bright red patch which covers two-thirds of the abdomen. 
The resemblance which had at first deceived me is not, how- 
ever, solely due to the colouring ; for the short, jerky flight 
and manner of running in and about the herbage, so charac- 
teristic of the Pompilidae, is also a marked feature in the 
movements of A. calcaratus. The bug is also to be found in 
the localities haunted by the Pompilidae. Within a few yards 
of the spot where I netted the above specimen and on the 
same day (Aug. 10th, 1899), [captured a 9 Pompilus viaticus, L. 
Again, in the New Forest, on Aug. 14th, 1908, I captured an 
example of A. calcaratus and Salius exaltatus, F. 2 in close 
proximity. On many other occasions, but always in sandy, 
heathy localities, I have seen this Coreid mimic, and its 
Pompilid-like movements and appearance have invariably 
attracted my attention. 
“The observations recorded above refer to the mature 
insect: I now propose to speak of the earlier stages. On a 
sand-bank just outside Beaulieu Road Station, in the New 
Forest, I observed (Aug. 10th, 1908) what I at first mistook for 
Formica rufa, L. Knowing, however, that the ant is not 
found in this spot my curiosity was aroused, and looking more 
closely I saw that the insect was an immature bug. Within a 
short distance several other examples were found. These Mr. 
E. A. Butler has kindly determined for me as very young 
specimens of A. alcaratus, L. In this stage the bugs are 
remarkably ant-like, resembling most closely the common 
F. rufa, although at Beaulieu they were running about in 
company with Formica fusca, Latr., race fusco-rufibarbis. This 
latter ant, which was very abundant, itself somewhat resembles 
a smalldark F. rufa. On Aug. 14th I found another immature 
Alydus in the same spot under precisely similar conditions. 
“We thus see that the same species of bug, in two different 
phases of its life-history, mimics forms belonging to two widely- 
separated families of the Hymenoptera. 
“ Pilophorus, sp.—I have also had various opportunities of 
observing two other species of Heteroptera which are remark- 
