( xxvii ) 



The Rev. W. W. Fowler exhibited two specimens of Pelophlla horcalis, 

 Curt, from Lowry's Lough, Ireland, in both of which the left-hand tarsus 

 svas much contracted; also a specimen of Tachys parvulus, Dej., taken by 

 Mr. J. H. Smedley near Liverpool at the roots of Parnassia palnstris. 

 Mr. Fowler remarked that it appeared probable that many of these small 

 Tachys, especially T. Fockii and T. 4-signatus, were often imported with 

 ballast. 



Mr. Fowler also exhibited tlie specimens of Cassida which had been 

 soaked in a colour-preserving solution last February (cf. p. v., ante), and 

 were now but very slightly faded owing to their exposure to light. 



Mr. C. 0. Waterhouse exhibited both sexes oi Helopeltis Antonii, Sign., 

 a great pest in the Cinchona plantations in Java, described by Signoret in 

 1858 from Ceylon. He also remarked that Helopeltis braconiformis, Walk. 

 (Cat. Hem. B. M. vi. 105, 1873), was synonymous with Didichius clavifer, 

 Walk, {he, iv. 170, 1871), both from Dorey, New Guinea. 



Mr. R. M'Lachlan exhibited the drawing of an exotic grasshopper, 

 taken in a hot-house near Birmingham ; he supposed it to be the same as 

 the American species already exhibited to the Society by Messrs. Saunders 

 and Weir, viz., Copiopliora cornuta. 



Mr. E. A. Fitch exhibited several females of Eriopeltis festucoi, Fonsc, 

 a Coccid new to Britain, found at Plymouth last September by Mr. G. C. 

 Bignell; these much resembled the white woolly cocoon of a Microgasterid. 



Mr. C. O. Waterhouse remarked that he had twice seen similar Coccidse 

 to those now exhibited ; once he found a large specimen on grass in the 

 Warren at Folkestone, and Mr. F. Moore found a different species near 

 Ilfracombe. 



Mr. G. B. Buckton communicated the following: — 



Notes on experiments made with the winged form, of Phylloxera 

 vastatrix radicicola. 



By Albert C. F. Morgan. 



Phylloxera vastatrix, as is well known, exists in two forms, viz., the 

 radicicola, or root-feeder, found in Europe, and the gallicola, or leaf gall- 

 making insect, found far more plentifully in America. 



Tlie following observations refer to the radicicola form found in Portugal, 

 and identical, I believe, with that which is common in France and other 

 parts of Europe. 



It will be remembered that the Phylloxera is, like other Aphides, 

 dimorphous, the one form being parthenogenetic and apterous throughout, 

 shedding its skin three times ; the other form developing wings after under- 

 going two further changes of skin. The eggs of the winged individual, 

 according to Balbiani and Lichtenstein, produce the two sexual foims, 



