On the Evolution of Structure in Seedlings. 45 



27. ? Odontocera Dice, Newm. 

 ? Odontocera Dice, Newm. Entom. p. 91. 

 Kio Janeiro. 



aaa. Hind legs sliort and stout ; femora thickly clavate. 



28. Odontocera triJiturata, Bates. 

 Odontocera triliturata. Bates, Trans, Ent. Soc. 1870, p. 324. 

 R. Amazons. 



29. Odontocera compressipes , White. 

 Odontocera compi-essipes, White, Cat. Long. Col. Brit. Mus. p. 191. 



R. Amazons, 



In this species the hind tibise are much dilated exteriorly 

 near the apex and tufted with hairs, evidently an adaptation — 

 the result, combined with colour and shape, being a close imi- 

 tation of a common yellow f5^ecies of Melipona bee. 



30. Odontocera farcifera, Bates. 

 Odontocera furcifera, Bates, Trans. Ent. Soc. 1870, p. .323. 



R. Tapajos, Amazons. 



In this species the elytra are of the same form as in the 

 typical Acyphoderes, i. e. subulate and pointed at the apex, 



31. Odontocera sinqjlex, White. 

 Odontocera simplex, White, Cat, Long. Col, Brit. Mus. p, 825, 

 R. Amazons. 



32. Odontocera hisidcata, Bates. 

 Odontocera bisidcata. Bates, Trans. Ent. Soc. 1870, p, 326, 

 R, Tapajos, Amazons, 



[To be continued.] 



VI. — Growth or Evolution of Structure in Seedlings. 

 By John C. Draper, M.D.* 



The continuous absorption of oxygen and formation of car- 

 bonic acid is an essential condition of evolution of structure, 

 both in plants and in animals. 



The above proposition, so far as it relates to animals, will 

 probably be admitted by all ; the opposite opinion, however, is 



• From the ' American Journal of Science and Arts,' vol. iv. November 



1872. 



