XXVI 



month. Males and apterous females without rostrum issued from the pupae 

 very shortly afterwards and copulated. The female laid in the tube a single 

 egg, which it surrounded with a white cotton-like secretion. The young 

 louse, constituting the first stage of the new cycle, made its appearance 

 about the 20th of April. It is now sucking at the leaf-stalk of the poplar, 

 and has already formed its spiral galls. I do not know, however, what 

 becomes of it from May to December, and hope to' be able to complete its 

 history. 



" Vaccuna dryojjhile, which I also followed up from the egg since 

 'November last, has given me to-day the winged Pseudogyne of the second 

 stage. I notice that it is of a bright yellow colour, while the autumnal 

 Pseudogyne of the fourth stage was dark green. 



" Phylloxera vastatrix, which passes the winter in tlie larval form of the 

 third generation, has laid pseud-ova during the last fortnight. 



" Phylloxera coccinea has already made its galls, or at least has curled 

 the point of the leaf of Quercus 2^uhesce)is, and is at its second moult. 



" I have not yet found any Phylloxera Quercus ; but the Quercus cocci/era, 

 whereon it begins its life, exhibits as yet no young leaves. 



" In CynijndcB I observed Neuroterus lenticxdaris laying its eggs (gem- 

 mations) in an oak-bud, which I carefully enclosed in a muslin bag on the 

 5th of April. A fortnight afterwards the leaves showed the well-known galls 

 of Spathegaster haccarum, and to-day I have seen five examples of the latter 

 flying in the muslin bag, where I expect they will copulate, and perhaps 

 reproduce the Neuroterus galls. According to my theory, Neuroterus 

 lenticularis would be the second stage larval form, or Pseudogyne of the 

 Spathegaster haccarum. This has already been discovered and published 

 by Dr Adler, of Schleswig. My observation confirms only that of the 

 learned countryman of Fabricius, published last year." 



Mr. Park Harrison exhibited some pieces of chalk found in some old 

 shafts at Cissbury, and having peculiar grooved markings on them. 

 Mr. Harrison exhibited the specimens to the Society, in order to learn 

 whether the markings could have been made by insects, and after some 

 discussion he was informed by the President that it might be taken as 

 the opinion of the Society that the grooved markings were decidedly not 

 the woi'k of any insect. 



Pajiers read, Sc. 

 The Secretary read a paper communicated by Di-. Fritz Miiller, entitled 

 " Notes on Brazilian Entomology," in which the author gave the results of 

 his observations on the odours emitted by butterflies and moths, as well as 

 facts bearing on various other subjects more or less connected with the 

 theory of Evolution. 



