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39 Abdomen bearing false legs beneath which differ from those of the thorax; body caterpillar-like, cylindrical, the thorax and abdomen not distinctly separated; larval forms. . . . . . os . 39. Antennse long and distinct. . . . . . . . . . . . . . . 40 Antennz short, not pronounced; larval forms. . . . . . . 53 40. Abdomen terminated by strong movable forceps; prothorax free. Earwigs. . . . . . . . . . . DERMAPTERA (Page 65) Abdomen not ending in forceps. . .

BRUES AND MELANDER: CLASSIFICATION OF INSECTS 39 FELT,E. P. Key to American Insect Galls. Bull. , No. 200, 310 pp. (1917). ) FERRIS, G. F. The Principles of Systematic Entomology. Stanford Univ. Publ. Biol. , 6, pp. 103-269 (1928). FLETCHER, T. B. South Indian Insects. 587 p ~ Madras . (1914). Tentative Keys to the Orders and Families of Indian Insects. Bull. Agric. Res. Inst. Pusa, No. 162, 101 pp. (1926). W. 'CV. Australian Insects. 463 pp. Sydney (1908). FROGGATT, GODYAN,F. D. , Editors. Biologia Centrali-Americana, Contributions to a Knowledge of the Fauna and Flora of Mexico and Central America.

42 Abdomen strongly constricted a t the base; prothorax fused with the mesothorax. Ants, etc.. . H Y M E N ~ P T E R A(Page 471) 42. Head not prolonged into a beak. . . . . . . . . . . . . 43 Head produced into a mandibulate beak. M E C ~ P T E R A (Page 189) 43. Very small (three millimeters), louse-like jumping species; prothorax inconspicuous. Book lice. CORRODENTIA (Page 96) Larger, or a t least not louse-like species; prothorax large.

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