Iv 



An anatomical memoir on the structure of the eyes of Dipterous 

 insects has been communicated to the Academy of Bologna by 

 M, G. V. Ciaccio (Rendiconto, p. 99), of which a translation of 

 the summary appears in the ' Journal de Zoologie,' of M. Paul 

 Gervais (Tom. v. No. 4). 



An article on the digestive apparatus in insects, by M. Jousset, 

 is noticed in ' The Academy ' of the 12th February last. 



A memoir upon the Blastoderms of spiders, by Herr Ludwig, 

 appears in Siebold and Kolliker's ' Zeitschrift' (Bd. xxvi. Heft 4). 



A paper upon the structure of the palpi of male spiders, by 

 J. H. Emerton, appears in the Proc. Boston Soc. xvii. p. 605. 



In ' Nature,' November 2, 1876, is the account of an experiment 

 upon the caterpillars of Pieris Brassicse at the time of their 

 assuming the pupa state, by J. A. Osborne. Of nine of these 

 caterpillars he cut through the silken girdle they had spun, thus 

 bringing them to the condition of the Suspensi : of these three 

 managed to secure hold of the caterpillar skin until they had 

 fastened themselves by their anal hooks to the silk to which the 

 anal feet of the larvae had been attached ; the others fell to the 

 ground for want of the suspensory girdle. 



M. Balbiani has continued his curious researches on the eggs of 

 the Phylloxera and their development, quoted in the ' Comptes 

 Eendus ' for 20tli and 27th November last. 



A memoir on the gynandromorphism of the Lepidoptera, with 

 especial description of two specimens of Saturnia (Callosoma) 

 Promethea, partly male and partly female, is given by A. S. 

 Packard, jun., M.D., in the Memoirs of the Boston Societj^ of 

 Natural History (vol. ii. pL iv. No. 111). In one of these insects 

 the right side of the body and antennae are male, the right wings 

 partly male and partl}^ female, and the left side of the body and 

 wings are male. In the other specimen the right half of the 

 insect is male and left half female. 



The last part of the ' Verhandlungen ' of the Natural History 

 Society of Prussian Rhine district (Corresp. BL, p. 93), is a notice 

 by D. V. Hagen on Hymenopterous gynandromorj)hic specimens 

 occurring in Prosopis obscurata, Schenck, Nomada glabella, 

 Thomson, Sphecodes reticulatus, Th., Andrena fuscipes, Ponera 

 androgyna {Thorell, Switzerland). Reference is made to others 

 described in the Berlin Ent. Zeitschr. for 1873, and the Stettiner 

 Ent. Zeitsch. for 1861. 



