Example: The red-legged locust (Melanoplus femur-rubrum). [Laboratory exercise]. External structure, [157.]—Life-history and habits, [161.]

Example: The water-scavenger beetle (Hydrophilus sp.) [Laboratory exercise]. External structure, [163.]—Internal structure, [166.]—Life-history and habits, [169.]

Example: The monarch butterfly (Anosia plexippus) [Laboratory exercise]. External structure, [171.]—Life-history and habits, [175.]

Example: Larva of monarch butterfly [Laboratory exercise]. Structure, [177.]

Other Insects.

Body form and structure, [181.]—Development and life-history, [188.]—Classification, [191.]—Locusts, cockroaches, crickets, etc. (Orthoptera), [192.]—The dragon-flies and May-flies (Odonata and Ephemerida), [194.]—The sucking-bugs (Hemiptera), [197.]—The flies (Diptera), [201.]—The butterflies and moths (Lepidoptera), [205.]—The beetles (Coleoptera), [206.]—The ichneumon flies, ants, wasps, and bees (Hymenoptera), [212.]

Class Myriapoda: The centipeds and millipeds.

Class Arachnida: The scorpions, spiders, mites, and tics.

XXII.—BRANCH MOLLUSCA: THE MOLLUSCS.

Example: The fresh-water mussel. (Unio sp.) [Laboratory exercise]. Structure, [239.]—Life-history and habits, [243.]