37 
300 or 400 Acari might be found on a single specimen, so that the humble-bee actually 
fell to the ground through their weight; he thought that the Acari fed on the comb, 
and crawled upon the body of the humble-bee when within the nest, and so were 
carried out. The presence of Acari on the dung-beetles (Geotrupes) also was 
notorious. 
Mr. Edwin Shepherd referred to the frequent occurrence of Acari on butterflies, 
and thought they were picked up from the flowers which the butterflies visited. 
Prof. Westwood directed attention to the editorial note appended to an article 
headed “ Larval Reproduction in Insects,” at p. 56 of ‘The Entomologist,’ vol. ii.: 
Mr. Newman there stated as a fact that the larve found by Prof. Wagner within the 
Dipterous larve from Kasan were “ those of one of the Pteromalide which habitually 
infests the larve of Diptera.” This might be so, but no grounds for the statement 
were adduced, and it did not appear that Mr. Newman had had any opportunity of 
investigating the point. It should be borne in mind that Prof. Wagner was perfectly 
well aware of “the familiar parasitism of the Ichneumonide” before publishing his 
discovery in Siebold and Kolliker’seZeitschrift, and in fact the course of his observa- 
tions bad been guided by his knowledge of the habits of the Pteromalide. At any 
rate, he (Prof. W.) protested against the dogmatic assertion of the editor of ‘The 
Entomologist, as tending to shut out from further inquiry a question which, to say 
the least, was as yet an open one,.and of which further investigation was most 
desirable. 
Papers read. 
Mr. Baly read a paper entitled “ Descriptions of uncharacterized Genera and 
Species of Phytophaga,” in illustration of which the new species were exhibited. 
Mr. Hewitson communicated “ Descriptions of four new Butterflies” (with 
drawings),—Heleyra Hemina from East India; Limenitis Labotas, from Menado; 
L. Ligyes, from Northern India; and Laogona Lilea, from East India. 
The Rev. H. Clark read “ Notes on the Genus Hydaticus of Leach, with descrip- 
tions of new Species.” The new species were thirteen in number, viz. Hydaticus 
Bakewellii, from Moreton Bay; H. Adamsii and H. aruspex, from China; H. vere- 
cundus (from South America and Java?); H. Bowringii, from China and Australia ; 
H. Ussherii, H. paganus, H. matruelis and H. fulvonotatus, from the Gold Coast; 
H. nigro-marmoratus, from Angola; H. parallelus (from New South Wales and the 
Cape of Good Hope?); H. histrio, from Northern India; and H. nigro-vittatus, from 
Japan. ‘ 
September 5, 1864. 
F. P. Pascor, Esq., President, in the Chair. 
Ps Additions to the Library. 
The following donations were announced, and thanks voted to the donors:— 
‘Catalogue of North American Butterflies, by J. W. Weidemeyer; presented by the 
Author, ‘Abhandlungen der Naturhistorischen Gesellschaft zu Nurnberg, Bd. 3; by 
the Society. ‘The Zoologist’ and ‘The Entomologist’ for September; by the Editor, 
‘The Entomologists’ Monthly Magazine’ for September; by the Editors. ‘The 
Naturalist, Nos. 1—9; by the West Riding Consolidated Naturalists’ Society. ‘The 
Intellectual Observer,’ Nos, 31 and 32; by the Publishers. ‘The Journal of the 
