CONTENTS vii 



A, Air-breathing Arthropods (Tracheata). 



Page 



Class I.— INSECTS (Insecta) - 343 

 Structure and Development of the Cockroach (Periplaneta orientalis), taken 



as a Type 343 



Order i.— BUGS (Hemiptera) - 351 

 (i) Homoptera (Cicadas, Lantern-Flies, Frog-Hoppers, Plant-Lice). 

 (2) Heteroptera (Land-Bugs, Water-Bugs). 



Order 2.— Fringe-winged Insects (Thysanoptera) 355 

 Corn Thrips (Thrips cerealium). 



Order 3. — Flies and Fleas (Diptera) - 355 



Order 4. — Moths and Butterflies (Lepidoptera) 358 



Order 5.— BEETLES (Coleoptera) 366 



Order 6. — Membrane-winged Insects (Hymenoptera) 369 



Order 7. — Net-winged Insects (Neuroptera) 374 



Order 8. — Straight-winged Insects (Orthoptera) 380 



Order 9. — WINGLESS INSECTS (Aptera) 384 



Class 2.— SPIDER-LIKE ANIMALS (Arachnida) 385 



Structure of a Scorpion, taken as a Type 385 



Order i. — Scorpions (Scorpionidse) - 387 



Order 2, 

 Order 3, 

 Order 4. 

 Order 5 

 Order 6, 

 Order 7 

 Order 8 

 Order 9, 



False Spiders (Solpugids) 387 



— False Scorpions (Pseudoscorpionidse) - 388 



■Whip-Scorpions (Pedipalpi) - 389 



•Harvestmen (Phalangidas) 390 



Spiders (Araneids) 390 



■Mites (Acarina) 393 



•Tongue-Worms (Linguatulidse) 393 



Bear-Animalcules (Tardigrada) 394 



Class 3.— CENTIPEDES AND MILLIPEDES (Myriapoda) 394 



Class 4.— PRIMITIVE TRACHEATES (Prototracheata) - 398 



Structure and affinities of Peripatus. 



B, Aquatic Arthropods (Branchiata). 



Class 5.— CRUSTACEANS (Crustacea) 402 



Structure of the Lobster (Homarus vulgaris), taken as a Type 402 



Sub-Class I. Higher Crustacea (Malacostraca) 410 



Order i. — Stalk-eyed Crustacea (Thoracostraca) 410 



(i) Ten-legged Crustacea (Decapoda) (Lobsters, Prawns, Shrimps, Cray- 

 fishes, Hermit-Crabs, Crabs) — (2) Opossum-Shrimps (Schizopoda) — 

 (3) Locust-Shrimps (Stomatopoda) — (4) Cumacea. 



Order 2.— Sessile-eyed Crustacea (Arthrostraca) 414 



(i) Amphipods (Sand-Hoppers, Whale-Lice, Skeleton Shrimps) — (2) Isopods 

 (Slaters, Wood-Lice). 

 Order 3. — Intermediate Crustacea (Leptostraca) — Mud-Shrimps 416 



Sub- Class II. Lower Crustacea (Entomostraca) 416 



