(OPeaome’ #)) 
Reduviid observed by Mr. Hamm, with precisely the same 
mimicry.” 
An UNbrxXPLAINED AssociaTion.—Dr. CHAPMAN also read 
the following note on a nest of Polistes gallica :— 
“ At Hyéres, on March 29th, 1911, at 10.30 a.m., witha gale 
from the east (Sirocco), sky overcast and a few drops of rain ; 
I found, on turning over a stone, under its edge a small nest of 
Polistes gallica. The nest consisted of eight small cells, in 
each of five of which was one egg. It could not have been 
founded very long. Under it (above it before the stone was 
turned over) there rested not one ? but two 9 2 side by side. 
The advancement of the nest showed that it was impossible for 
one of these to be a worker reared in the nest. 
“Were they working together, or was one only a casual 
visitor, taking shelter during the inclement weather? In the 
latter case would it not have been regarded and treated as an 
enemy, instead of both resting together in a _ thoroughly 
friendly way?” 
Living Larvar or CaLLopurys avis.—Dr, CHAPMAN also 
exhibited some well-grown larvae of Callophrys avis from the 
Riviera. 
Hemipterous Mimics or Hymenoprera.—Prof. . Pouuron 
exhibited on behalf of Mr. A. H. Hamm, assistant in the 
Hope Dept. of the Oxford University Museum, a case of 
insects illustrative of certain associations of mimetic British 
Hemiptera-Heteroptera with their Hymenopterous models, 
and communicated the following paper from him :— 
“The examples of mimicry mentioned below may be well 
known to entomologists : certainly the ant-like appearance of 
Nabis 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. 
“ Alydus calcaratus, L.—During one of my visits to S. 
Devon (August, 1899), I was collecting Aculeates on and 
about the heather at Bovey Tracey, and took what I thought 
was a Pompilid. On looking into the net I was surprised to 
