9256 Entomological Society. 
Professor Westwood, in calling attention to the preparation, by Mr. Baker, of 
Cambridge, of a larva of Zenzera Hsculi, 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: Zenzara 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 veius at the basal part of the anterior wings covered with specimens of a 
red species of Acarus. i 
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 bad 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 
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 Lusects,” 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 Piteromalide 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 Kojliker’s Zeitschrift, and in fact the course of his observa- 
tions had 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),—Helcyra Hemina from East India; Limenitis Labotas, from Menado; 
8. Ligyes, from Northern India; and Laogona Lila, from East India, 
The Rev. H. Clark read “ Notes on the Genus Hydaticus of Leach, with deserip- 
_ tions of new Species.” The new species were eight in number, viz. Hydaticus Bake- 
wellii, 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 and H. matruclis, from the Gold Coast.—J. W. D. 
