BIOLOGY. 
Ins. 81 
Account of the malpighian tubes of numerous forms of Hymenoptera 
in different stages, and changes duriug metamorphosis, Bordas (132). 
Urates functioning as colouring agents in Pieridce , Hopkins (508-510). 
Histology of silk-glauds of Tenthredinous larva, Cholodkovsky (206). 
Eversible repugnatorial glands in insects generally, Packard (839). — 
Exstulpatory glands of prothorax of Notodonta ziczac larva, Brants 
(Im- 
position of odorific apparatus of IJemiptera , Kunckel (GG3). 
Ceriparous glands of Aphididoi and Coccidce , Visart (1175). 
Influence of food on silk of Saturnia pyri, Badanelli (GO). 
Secretion of wax by Lepidoptera , Knaggs (609). 
Secretion of Potassium hydroxide by Dicranura vinula , Latter & 
Meldola, P. ent. Soc. London, 1895, p. xv. 
Sexual Organs and Sex (inch Hermaphrodites). 
Anatomy of male sexual organs of Vespa germanica , Kluge (608). 
Anatomy and physiology of the ovaries of worker ants, Bickford 
(HO). 
The male sexual glands of Hymenoptera , Bordas (133). — The structure 
of male genitalia in ants and their allies ; Emery (334). — Morphology 
of copulatory organs and abdomen, Peytoureau (8G3). — Morphology of 
terminal segments, and copulatory organs A 9 of Orthoptera and Ephc- 
meridce , Peytoureau (862). — Morphology of abdomen of Erotylidee and 
Eudomycliidce , and anatomy of muscles of male organs of Triplax , 
Veriioeff (1105). — Morphology of abdomen of Coccinellidai , and its 
muscular systom, Veriioeff (1104). 
Discussion (largely personal) as to structure of male sexual characters 
of Coleoptera , Veriioeff (1108), Weise (1228), Schwarz (1029). — 
Various articles — largely polemic in character — dealing with the nomen- 
clature of male copulatory organs are to be found iu Ent. Nachr. xxi. 
Morphology of £ and 9 abdominal appendages, &c., of Gryllotalpa 
and other Gryllidcc , Saussure & Zehntner (1002). 
Structure of base of ovipositor of Hymenoptera , Marlatt (725). 
Double spermatozoa of Dytiscidce, Ballowitz (65). 
Spermatogenesis of Caloptenus, Wilcox (1235) : of Caloptenus and 
Cicada , Wilcox (1236). — Spermatogenesis in silkworm, Verson (1109). 
Amitotic nucleus division in ovaries of IJemiptera and of LocusUt 
viridissima, Preusse (902). 
The supposed parthenogenesis of Halictus , Perez (852). — Partheno- 
genesis in Lepidoptera, Tutt, pp. 4, &c., Ent. Rec. vi : in silkworm, 
Perez, p. 235, Act. Soc. Bordeaux, xlvii. 
Causation of sex iu social insects, Tutt (1149). — Production of the 
sexes in bees of the Meliponite group, Perez (849).— Production of 
sexes of Vespa , Marchal (723). — A queen bee incapable of laying drone- 
eggs, Grobben (460). 
Hermaphrodites of Lepidoptera , CASrARl (193) ; of Picris napi , var. 
hryoniai , Batii, p. 256, Entomologist, 1895 ; of Bomhyx castrensis, Ingall, 
1895. [VOL. XXXTI.] E 6 
