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"1. Lower mandible. 2. Upper mandible. 3. Forehead. 4. Loral space. 5. Crown of the head. 6. Hind part of the head. 7. Scapulars--long feathers frm shoulders over sides of back. 8. Smaller wing coverts. 9. Bend of the wing. 10. Larger wing coverts. 11. Tertials, arising from the second bone of the wing at the elbow-joint. 12. Secondaries, from the second bone of the wing. 13. Primaries, from the first bone of the wing. 14. Tibia, the thigh. 15. Tarsus, the shank. 16. Upper tail coverts. 17. Lower tail coverts. 18. Tail feathers." -Roosevelt, 1884

Bird Parts

"1. Lower mandible. 2. Upper mandible. 3. Forehead. 4. Loral space. 5. Crown of the head. 6. Hind part…

"Cypris, side view, after removal of one valve. e., Eye; A.1, first antennae; A.2, second antennae; MN., mandibles; mx.1, first maxilla; mx.2, second maxilla; f.1, f.2, thoracic legs; Ab., rudimentary abdomen." -Thomson, 1916

Cypris

"Cypris, side view, after removal of one valve. e., Eye; A.1, first antennae; A.2, second antennae;…

Piercing mouth structure of a "horse-fly": the sucking lip is omitted.

Mouth Structure of a Horse Fly

Piercing mouth structure of a "horse-fly": the sucking lip is omitted.

Mouth parts of a plant-louse. -<em>a</em>, the jointed beak; <em>b</em>, the lancets, much enlarged; <em>c</em> and <em>d</em> illustrate the feeler and foot.

Mouth Parts of Plant Louse

Mouth parts of a plant-louse. -a, the jointed beak; b, the lancets, much enlarged;…