October, '13] WATSON: CRYPTOTHRIPS INJURY 413 



BIBLIOGRAPHY 



1825. Say, Thomas. — Acad. Nat. Sci. Phila. vol. iv. p. 340. Original description. 



Inhabits Missouri. 

 1851. Fitch, Asa. — Homop. N. Y. State Cab. p. 57. Describes Gypona flavilineata. 

 1867. Fitch, Asa.— Trans. N. Y. State Agr. See. vol. xxvii. p. 893. (r2th Rep.) 



General account of Gypona oclolineala and Gypona flavilineata, which are 



considered separate. 

 1873. Riley, C. V. — 5th Rep. Ins. Mo. p. 121. Gives a figure of egg punctures in 



apple bark, then supposed to be those of Ceresa bubalus Fabr. 

 1892. Riley, C. V. — ^Proc. Ent. Soc. Wash. vol. iii. p. 88. Says that figure of egg 



pouches given as those of Ceresa bubalus (1873) are those of an allied Mem- 



bracid, Ceresa taurina Fitch. 

 1897. OsBORN, Herbert and Ball, E. D. — Iowa Agr. Exp. Sta. Bui. 34. p. 616. 



Life history notes. The forms octolineata and flavilineata are considered as 



the same species. 

 1900. Lugger, Otto. — 6th Rep. Minn. Ent. p. 135. Affecting blackberry in Min- 

 nesota. 

 1900. Forbes, S. A. — ^21 Rep. State Ent. 111. p. 72. Affecting sugar beet in Illinois. 

 1907. Surface, H. A.— Pa. Dept. Agr. Zool. Bui. vol. 5. no. 3. Plate IX. Gives an 



excellent figure of Gypona egg punctures in bark, but refers these to Ceresa 



bubalus. 



1909. Webster, R. L. — Journ. Econ. Ent. vol. ii. p. 193. Mentions finding eggs in 



an apple, possibly those of Ceresa taurina. 



1910. HoDGKiss, H. E.— N. Y. Agr. Exp. Sta. Tech. Bui. 17. p. 100. Says that the 



egg pouches figured by Riley as Ceresa are those made by species of Gypona. 



AN UNUSUAL TYPE OF INJURY DUE TO A THRIPS 



By J. R. Watson, Gainesville, Fla. 



In the Entomological News for February, 1912, the writer de- 

 scribed an apparently new species of thrips {Cryptothrips floridensis) , 

 which was attacking camphor trees on the extensive plantation of the 

 Satsuma Company at Satsuma, Florida. Since then some additional 

 studies and a personal inspection of the work of the insect in the field 

 have been made. These studies have discovered a type of injury so 

 unusual for a thrip as to suggest that it might not be without interest 

 to the readers of the Journal of Economic Entomology. 



In the beginning of the infestation of the camphor tree, the eggs 

 are laid between the scales of the terminal bud. If the bud has com- 

 menced to develop when the eggs hatch, the larvae first attack the new 

 growth. If there are but a few of the larvae on each bud, there will 

 result a blackening and deforming of one side of the young leaves 

 (Plate 11, figure 1). If there are more of the larvae, the developing 

 bud will be killed outright, (Plate 11, figure 2). The insects then at- 

 tack the younger twigs where they feed in groups, the yellow larvae 



