most interestiug species taken in the first-mentioned locality 
were Euchloe eupheno, and Coenonympha arcanioides ; in the 
latter Dry as pandora, and Melitaea aetheria, var. algerica. 
Mimics and Models from South America. —Mr. W. J. 
Kaye exhibited remarkable examples of wasp-like and beetle¬ 
like Syntomidae, with their models, the w'asps and beetles from 
British Guiana, S.E. Brazil and Venezuela, many having 
been observed personally by himself. Attention was par¬ 
ticularly drawn to the wonderfully close habits of the one 
to the other, so much so that it was impossible in some 
instances to distinguish the moth from the model until it 
settled. This was the case with Pseudosphex noverca and the 
wasp Zethus binodis which Mr. Kaye had caught on Ageratum 
fiowers at Fernandes Pinheiro in Parana. It was true that 
there was a better model where the likeness was even 
more complete in the Vespid Polyhia nigra, and Mr. A. 
Bertoni had taken the Pseudosphex with the Polyhia in Para¬ 
guay. A new species of Pseudosphex was taken with the 
Vespid IfeganthojMS cassununga. These two insects so closely 
resembled one another that even at a distance of eighteen 
inches or less it was not an easy matter to distinguish them. 
Besides the general appearance in build, the wings, and the 
markings, the antennae were remarkable in having exceed¬ 
ingly fine white thread-like ends, which became invisible when 
the insect settled on the white Ageratum flowers, so that only 
the black pectinated portion was visible, wdiich exactly re¬ 
sembled the antennae of the wasp. Many species of Alacro- 
cneme had developed this remarkable character in the antennae. 
Several, if not all the species of this genus also carried their 
hind-legs extended out behind them wKen in flight, and this 
gave them an extraordinarily close resemblance to the Pom- 
pilidae, which had the same habit. The species Macrocneine 
lades and M. leucostigma had the hind tibia and tarsus 
heavily clothed with black hair, and this accentuated the 
likeness to the heavy black legs of various species of Salius. 
The heavy flight of such species as Macrocneme lades and 
M. leucostigma, combined with other characters, made them 
exceedingly close mimics of various species of Salius among 
the wasps. 
