( Ixxx ) 



Exhibits. 



Abnormal Neuration in Melitaea aurinia. — ISh. 0. E. 

 Janson exhibited an abnormal specimen of Melitaea aurinia, 

 taken in Kent, in whicli six of the nervnres were almost 

 symmetrically deficient on either side, causing an alteration 

 in the usual form of the sub-marginal lunular black markings, 

 and giving it a very distinctive aspect. 



Chloroperla venosa, Steph., and C. grammatica, Poda. — 

 Mr. G. T. PoRRiTT exhibited a series of Chloroperla venosa, 

 Steph., taken by Prof. Carr and Air. Mottram on the river 

 Trent, near Nottingham; also a series of Chloroperla gram- 

 matica, Poda, for comparison. 



Abnormal Hymenopteron. — The Eev. F. D. Morice 

 exhibited a specimen of Crahro (Lindeinus) albilabris, F., $, 

 with abnormal ocelli ; one wanting, and the others misplaced. 



Ova of Arge pagana. — He also exhibited a photograph, 

 from nature, of eggs in situ, laid in a rose-stem in a double 

 roiv by Vallisnieri's " Mosca dei Kosai," A. pagana, Panz., 

 exactly as in the author's original figure. 



Mr. C. B. Willl4lMS observed that there exists a Thysano- 

 pteron the individuals of which vary between having two and 

 three ocelli, but that in this case no change occurs in the 

 position of the other two where one is absent. 



Gynandromorphous Plebeius argyrognomon, etc., from 

 Switzerland. — The Rev. G. Wheeler exhibited a gynandro- 

 morphous specimen of Plebeius argyrognomon taken by him in 

 the Val Maggia on July 13 this year. It was exactly halved, 

 the right wings being $, the left q. The body was also 

 halved, the external characters of both sexes being present, 

 the (J half of the body extending considerably beyond the ?. 

 Also an extreme example of ab. persica of Polyommatus 

 icarus taken on the marshes at Altmatt, on July 11, and a 

 cJ of Pararge maera with symmetrical deeply concave costa 

 of both fore-wings, taken on the Via Mala on July 17. He 

 also exhibited a well-marked series of Pieris manni from 

 Vernayaz, taken on July 5 this year, the occui'reuce of P. 

 manni in Switzerland having been disputed. 



RuMiciA phlaeas, etc., from North Kent. — ^Ix. Prideaux 



