36 
August 1, 1864. 
The Rev. Hamtet Crark, V.P., in the Chair. 
Additions to the Library. 
The following donations were announced, and thanks voted to the donors:—_ 
‘ Memorias de la Real Academia de Ciencias de Madrid, ia Ser. Tom. ie, par. 2a ; 
2a Ser. Tom. le, par. 3a, Tom. 2e, par. la; presented by the Academy. ‘Schriften 
der Konig]. Physikalisch-ckonomischen Gesellschaft zu Konigsberg,’ vol. 4, parts 
1 and 2; by the Society. ‘ Bulletin de la Société Imperiale des Naturalistes de | 
Moscou,’ 1863, Nos. 1 and 2; by the Society. ‘ Transactions of the Zoological Society 
of London,’ Vol. v. part 3; ‘ Proceedings of the Zoological Society of London,’ 1863, 
parts 1—3 ; by the Society. ‘ Proceedings of the Royal Society,’ Vol. xiii. No. 65; by 
the Society. ‘ The Zoologist’ for August ; by the Editor. ‘ The Entomologist, Vol. ii. 
No. 4; by the Editor. ‘The Entomologist’s Monthly Magazine, No. 3; by the 
Editors. ‘ The Reader’ for July ; by the Editor. ‘ The Journal of the Society of Arts’ 
for July ; by the Society. ‘ British Moths and their Transformations, by H. N. Hum- 
phreys and J. O. Westwood ; ‘ Essai Monographique sur la Tribu des Psychides,’ par 
T. Bruand ; ‘ The Lepidopterist’s Calendar, by Joseph Merrin ; ‘ La Flore des Insect- 
ophiles, par Jaques Brez; ‘Catalogue Synonymique des Coléopteres d’Europe et 
d’ Algerie, par J. Gaubil ; ‘Genera et Index Methodicus Europeorum Lepidopterorum,’ 
a Doctore J. A. Boisduval; ‘ Europeorum Micro-Lepidopterorum Index Methodicus, 
par A. Guenée; ‘ Die Tineen und Pterophoren der Schweiz,’ von Prof. Frey ; ‘ Letters 
of Rusticus ; ‘ Wabre Parthenogenesis bei Schmetterlingen und Bienen,’ von C. T. E. 
von Siebold ; ‘On a true Parthenogenesis in Moths and Bees,’ by C. T. E. von Siebold, 
translated by W.S. Dallas; presented by J. W. Dunning. 
The following addition, by purchase, was also announced :—‘ Berichte wher die 
wissenschaftlichen Leistungen im Gebiete der Entomologie,’ 1888—1847, von Dr. W. F. 
Erichson. 
Exhibitions, §c. 
Mr. Bond exhibited Gelechia pinguinella, a species new to Britain, fuund on the 
trunks of poplars near London ; and a specimen of Nyctegretes Achatinella, one of the 
rarer British Phycide, captured by Mr. Thomas Brown near Yarmouth. 
Mr. J. Jenner Weir exhibited an albino variety of Eubolia bipunctaria, caught on 
the South Downs. 
Professor Westwood, in calling attention to the preparation, by Mr. Baker of 
* Cambridge, of a larva of Zenzera AXsculi, took occasion to observe that the upholders 
of the law of priority in nomenclature were bound to restore the name Zenzera in lieu 
of Zeuzera: Zenzera was the name first given to the insect by Latreille, and it was 
only by a typographical error that Zeuzera had ever appeared. 
Mr. M‘Lachlan exhibited a specimen of Libellula striolata,*from Montpellier, 
having the veins at the basal part of the anterior wings covered with specimens of a 
red species of Acarus. 
Prof. Westwood remarked that the Acari had probably taken up their position for 
the purpose of sucking some fluid matter, which went to show that the wing-veins were 
not (as had been supposed) mere horny matter, not containing fluid. 
Mr. F. Smith doubted whether the Acari had placed themselves on the wing-veins 
in search of food or suction; humble-bees were often covered with these insects, and 
