CONTENTS. 



PAGE 



Loxosoni't No. 5 553 



Barbed Hooklets on Spines of a Brachiopod „ 553 



Kew Genus of Polyzoa No. 6 707 



Embryology of Tendra zostericola „ 707 



Bccent Species of Heteropora No. 7 862 



Cyphonantes „ 863 



Arthropoda. 



The Form of the Crystalline Cones in the Arthropod Eye ,. No. 1 56 



Structure of the Cerebrum and Retina in the Arthropoda .. No. 5 554 



a. Insecta. 



Besearches on the Proboscis of Butterflies No. 1 41 



New (^Auditory') Sense-organs in Insects. (Plate IV.') .. „ 45 



Post-embryonic Formation of Appendages in Insects . . .. „ 55 



M(dpighian Vessels of Insects ,, 60 



Parthenogenesis in Bees „ 88 



Poison Apparatus and Anal Glands of Ants No. 2 142 



Parthenogenesis in Bees „ 143 



Hermaphroditism in Perlidoi .. ,. „ 144 



Parthenogenesis in Bees No. 3 297 



Spinning Glands of the Silkworm „ 297 



Odoriferous Cells in Lepidoptera „ 298 



Seasonal Dimorphism of Lepidoptera „ 298 



Development of Podurella „ 299 



Respiratory Organs of the Larva of Cidex „ 299 



Sucking Plate of Dytiscns „ 300 



Gull-making Ap)hides No. 4 407 



Buzzing of Insects „ 408 



Larval Cases of Phryganeidoe „ 408 



Development of the Silkworm .. ..• „ 409 



Venomotis Caterpillars „ 411 



Abortion of the Hairs on the Legs of certain Caddis-flies, ^-c. „ 412 



Comparative Embryolo:iy of the Insecta „ 413 



Formation of the Blastoderm and of the Germ-layers in 



Insects No. 5 554 



Mode of Recognition among Ants „ 555 



Toilet Habits of Ants „ 556 



Malformation in an Insect „ 558 



Parasitic Insects „ 558 



Notes on Phryganea: „ 558 



Habits and Intelligence of Vespa maculata ,, 559 



Metamorphoses of the Blister Beetle (^Lytta vesicatoria, 



Fab.) No. 6 708 



New Genus of Cochineals of the Elm „ 709 



Notes on the Phryganida „ 710 



Nervous System of Insects No. 7 863 



Cephalic Ganglia of the Insecta „ 864 



Brain of the Cockroach „ 864 



Nerves of the Proboscis of Diptcra „ 865 



Sense-organs of Insects „ 865 



Scales of the Lepidoptera „ 866 



