U. S. D. A., B. E. Bnl. 97, Part V. D. F. I. I., November 6, 1911. 



PAPERS ON DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



NOTES ON THE PEACH AND PLUM SLUG. 



(Caliroa [Eriocampoides] amygdalina Rohwer.) 



By R. A. Cushman, 

 Agent and Expert. 



INTRODUCTION. 



On August 7, 1909, the writer's attention was attracted by a 

 peculiar injury to the leaves of a peach tree standing in the yard of 

 the Delta Boll Weevil Laboratory at Tallulah, Madison Parish, La. 

 (See PI. XL) This injury consisted in the skeletonizing, with subse- 

 quent curling and falling, of the leaves by a small, yellowish-white, 

 sluglike larva, resembling very closely in form the pear slug (Erio- 

 campoides limacina Retz.). Investigation showed that most of the 

 peach trees in the neighborhood were more or less severely injured. 

 On August 16 an abundance of small black sawfhes was observed 

 alighting on a variety of trees and shrubs, and it was immediately 

 thought that these were the adults of the sluglike larvae on the peach 

 trees. From the close resemblance of both the larvae and the adults 

 to those of the pear slug it was at first supposed that the insect in 

 question must be of that species, but comparison of the adults with 

 the description of the pear slug showed differences. Specimens of 

 the adults were therefore sent to Mr. S. A. Rohwer of the Bureau of 

 Entomology, who stated that they belonged to a species new to 

 science. Mr. Rohwer has described the species as Caliroa (Erio- 

 campoides) amygdalina. 1 



What is undoubtedly the same species was discussed and figured by 

 Prof. H. A. Morgan, in 1897, 2 under the name Caliroa (Selandria) 

 obsoletum, and the common name " peach and plum leaf sawfly." His 

 article covers a little more than 3 pages, and embraces notes on 

 the biology and natural enemies of the species and remedial measures. 



i Entomological News, vol. 22, no. 6, pp. 263-265, figs. 1-6, June, 1911. 

 2 Report of the Entomologist, Bui. 48, 2d ser., La. Agr. Exp. Sta., pp. 142-145, 1897. 



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