120 THE ZOOLOGIST. 



Dr. Sharp exhibited samples of pins which he had tried for preventing 

 verdigris, and stated that silver wire was the best material to use, as insects 

 on silver pins remained intact, whilst those on gilt pins were destroyed by 

 verdigris. 



Mr. G. T. Porritt exhibited a series of specimens representing Hudders- 

 field forms of Folia chi, including nearly melanic specimens, found there 

 during the last two seasons. He said these forms had not hitherto been 

 observed elsewhere. 



Mr. Tutt exhibited a series of Hadena pisi, comprising specimens very 

 grey in tint, others of an almost unicolorous red with but faint markings, and 

 others well marked with ochreous transverse lines. Three distinct forms 

 of Hadena dissimilis ; red and grey forms of Panolis piniperda, and a dark 

 form of Eupithecia fraxinata ; also a specimen of Sciaphila penziaaa. 

 With the exception of the last-named, which was taken in Anglesey, all 

 the specimens were takeu or bred by Mr. Tunstall in the neighbourhood 

 of Warrington. 



The Rev. Dr. Walker exhibited specimens of Arge titea, A. lachesis, 

 A. psyche, A. thetis, and other species of the genus from the neighbourhood 

 of Athens ; also specimens of Argynnis phcebe, taken in Grenada in May, 

 1891. 



Mr. W. Farren exhibited a series of specimens of Peronea variegana 

 var. cirrana, and P. schalleriana var. latifasciana, from Scarborough ; 

 Eupa3cilia vectisana, from Wicken Fen ; and Elachista subocellea, from 

 Cambridge. 



Mr. G. A. J. Rothney sent for exhibition a number of species of ants 

 collected by himself in Australia, in May and June, 1886, which had 

 recently been named for him by Dr. Forel. The collection included: — 

 Iridomyrmex purpurens, Sm., I. rufoniger, Lowne, I. gracilis, Lowne, 

 I. itienerans, Lowne, Ectatomma metallicum, Sm., E. nudatum, E. mayri, 

 Aphanogaster longiceps, Sm., Polyrhachis ammon, Fab., Myrmecia nigri- 

 ventris, Mayr, and nigrocincta, Sm.; Leptomyrmex erytlirocephalus, Fab., 

 and a variety of Camponotus rubiginosus, Mayr, from Brisbane; also a 

 few species from Honolulu, and a species of Monomorium, which Dr. Forel 

 had not yet determined, and which he believed to be probably new. 



Mr. C. 0. Waterhouse read a paper entitled " Some Observations on the 

 Mouth Organs of Diptera," which was illustrated by numerous diagrams. 

 A long discussion ensued in which Mr. Champion, Mr. McLachlan, Mr. 

 Jenner Weir, M r. Slater, Mr. Poulton, Mr. Distant, Dr. Sharp, Mr. Hampson, 

 Mr. Elwes, and Mr. Barrett took part. 



Mr. E. Meyrick read a paper entitled "On the Classification of the 

 Geometrina of the European Fauna." Mr. Hampson, Mr. Elwes, Mr. 

 McLachlan, Colonel Swinhoe, Mr. Tutt, and Mr. Distant took part in the 

 discussion which ensued. — II. Goss, Hon. Secretary. 



