^ liv 



the wings of which were simultaneously depressed and elevated. 

 This was confirmed by Mr. Hewitson in vol. iv. Proc. p. ii. 



In the 'Entomologist's Monthly Magazine' for January, 1877, 

 is a paper by Mr. Swinton detailing the structure of the basal 

 portion of the wings and the serrated structure of the anal vein of 

 the fore wing, and the smooth raised surface of the costal vein of 

 the hind wings. Figures of these structures, by which the sound 

 is produced when they are rubbed together, are added. The 

 author seems to have overlooked the curious notice of the 

 production of a similar sound in the butterflies of the genus 

 Ageronia observed by Mr. Darwin (see Gen. Diurn. Lep. i. p. 82). 



Mr. Wood- Mason has made us acquainted with a curious 

 instance of stridulation observed by himself in an Indian spider 

 (Annals Nat. Hist., Jan. 187G). 



An elaborate memoir on a very delicate portion of the internal 

 anatomy of lepidopterous insects first noticed by Newport, has been 

 published in Hofmann's ' Niederlandisches Archiv. flir Zoologie' 

 (Bd. iii.. Heft 2, 1876), with the title " Ueber das sogenannte Bauch- 

 gefiiss der Lepidoptera nebst einigen Beobachtungen uber das 

 sympathische nervensystem dieser insectenordnung," specimens of 

 all the different tribes of Lepidoptera from the Papilionidae to the 

 PterophoridfE having been carefully dissected and described. 



A memoir of the internal spinning apparatus of Lepidopterous 

 insects, by Helm, has been published in Siebold and Kolliker's 

 ' Zeitschrift' (vol. xxvi. Heft 4). 



A remarkable memoir by Dr. O. J. B. Wolff appears in the 

 ' Nova Acta Acad. Natur. Curios.,' vol. 38, Dresden, 187G, 4to, 

 with eight plates, in which the author has investigated the minute 

 anatomy of various portions of the structure of bees (^pis, 

 Prosopis, and Tlylceus), especially with reference to the mechanism 

 of the mouth-organs and respiratory organs of the thorax and 

 abdomen. The author does not appear to liave been acquainted 

 with the description and figures which I gave of the progressive 

 action of the parts of the month in Anthoj)hora in my ' Introduc- 

 tion,' from a state of quiescence to the full extension of the 

 sucking apparatus, which is, I think, better shown in that insect 

 than in any other of the bees. 



A memoir on the " Metamorphoses of Tipula oleracea and 

 Musca carnaria," by Mr. A. Hammond is reported in the 'Journal 

 of the Quekett Club ' for May last. 



