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taken by him at Jericho in 1899, in which again, while all 

 its congeners are practically unicolorous, the abdomen is 

 banded, as in a wasp, with yellow. A discussion followed 

 as to the reason of the peculiar coloration in the species under 

 review, the exhibitor pointing out that the colour-mimicry in 

 these species could not be due to parasitism, both Panurgus 

 and Heriades being industrious genera. He also invited any 

 information or suggestion which might explain the pheno- 

 menon, so common in various Aculeate genera, of a white or 

 yellow face in the S , represented only by two spots or streaks, 

 or often not at all, in the corresponding $ . Professor E. B. 

 Poulton, F.R.S., expressed his opinion that the species shown, 

 though industrious, were mimics ; and that the question as to 

 the i$ face was not at present answered, or answerable, but 

 that it might perhaps be ascertained by experiment in what 

 way it was of advantage to the S to have this character which 

 the $ did not need. The pale face in these and other S bees 

 could not be explained on the lines of mimicry, but might 

 be used as a method of recognition. In the case of some 

 Algerian Aculeates the light pubescent colouring of the head 

 might assist as a protection to the insect when looking out 

 of its hole in the sunshine. The coloration of the abdomen 

 however suggested a case of mimicry. Mr. C. O. Waterhouse 

 mentioned that with some JBup-estidee the front of the head in 

 the <$ was light, but unicolorous in the $ ; a peculiarity 

 also observed by Mr. M. Jacoby in the genus Cryptocephalus. 



Mr. W. J. Lucas showed a $ specimen of the earwig 

 Forficula auricularia taken at Warwick in September last, 

 with a drawing of the cerci (forceps), which were entirely 

 abnormal, the broader basal part of the two appearing to be 

 more or less fused together, while the legs of the forceps were 

 jointed to the basal part. The case, he said, was interesting 

 because in cockroaches, etc., the cerci are regularly jointed. 



Mr. G. C. Champion exhibited various interesting insects 

 from Guatemala recently received from Senor Rodriguez, in- 

 cluding Heterostemus rodriguezi, Cand., Pantodinus klugi, 

 Burm., Plusiotis adelaida, Hope, and a species of Orthoptera 

 greatly resembling a dead withered leaf, possibly a new species 

 of Mimetica. 



