( 2 ) 



insects illustrative of certain associations of mimetic British 

 Ileniiptera-Heteroptera with their Hymenopterous models, 

 and communicated the following paper from him : — 



"The examples of mimicry mentioned below maybe well 

 known to entomologists : certainly the ant-like appearance of 

 Nobis has been often described. My chief object is to record 

 the fact that the Hemiptera are to be found in the localities 

 frequented by their models, and often in their company. 

 Field observations are especially important in the mimics of 

 insects, such as the Hymenoptera Aculeata, with extremely 

 characteristic habits and movements. 



" Alydvs calcaratU8, L. — During one of my visits to S. 

 I 1 ' "ii (August, 1899), I was collecting Aculeates on and 

 about the heathei at Bovey Tracey, and took what L thought 

 was a Pompilidi On Looking into the net I was surprised to 



[xxxi 

 see nothing bul an ordinary looking, although very active.', 



Coreid bug. While still watching il running about the i 

 the bug opened its wing- 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, hew 

 ever, solely due to the colouring j 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. calcaraius. The bug is also to be found in 

 the localities haunted by the Pompilidae. Within a few yards 

 of the spot when I uetfc the bove specimen and on the 

 same da\ (Aug. I Oth, 1899), [captured a . PompUus viaticus, Ij. 

 Again, in the New Forest, on Aug. 1 Ith, 1908, I captured an 

 example of A. calcaratw and . F. ? in close 



proximity. < >n many other occasions, but always in sandy, 

 heathy localities, 1 have Been this Coreid mimic, and its 

 Pompilid-like movements and appearance have invariably 

 1 my attention. 

 "The observations recorded above refer to the mature 

 insect: I now propose to speak of the earlier stages. On a 

 Band-bank just outside Beaulieu Road Station, in the New 

 Forest, I observed (Aug. LOth, 1908) what I .-it first mistook for 

 Formica rufa, L. Knowing, however, thai the ant U i 



