PSYLUD NOTES. 221 



Psylla gilletti n. sp. 



Psylla gilletti Riley, MS. seems to be well represented in 

 collections though not accompanied by ecological data. The 

 wing is characterized by the short acute stigma, the distinct 

 heavy dark spot between tip of claviis and margin of wing, and 

 the four distinct linear dark marginal dashes as indicated in 

 Fig. 396. The head of the female is well represented in Fig. 

 414. The female cauda (Fig. 428'! is rather heavy and about 

 subec[ual in length to the two preceding segments The male 

 forceps (Fig. 422) end in two short rather blunt projections and 

 the terminal inner setal spines are strong and stiff. 



Me. 1339 Sub 42. One specimen with data "Colo. 1456. Cornell U. 

 Lot 157. Sub 33. Psylla ribis Riley MS. Received by exchange from 

 Carl F. Baker." 



Me. 1348 Sub 6. One female with data "Psylla gilletti Riley MS. Colo. 

 1887, 6-1 1-95. Ft. Collins, C. P. G." One female with data "Colo. 2078, 

 4-22-96, C. P. G. Ft. Collins." 



iMe. 1348 Sub 20. One specimen with data "Onagra Ks. 5-26-92, 

 C. P. G. Trinidad, Colo. Psylla gilletti Riley, MS." One specimen 

 with data "464 Onagra Ks. 5-27-92, C. F. B." One specimen with data 

 "Colo. 427. 5-19-92 Soldier Canyon, Colo. C. P. G." One specimen with 

 data "Col. Ac. Cat. 28. Mrs. P. Gillette, Ft. Collins." "Twenty-two speci- 

 mens with data "Colo. 2075 4-22-96. C. P. G. Horse tooth Gulch (near Ft. 

 Collins) Bloom of Salix." One specimen with data "Colo, 1887. 

 6-11-95 Ft. Collins. C. P. G." Two specimens with data "Colo. 2078. 

 4-22-96 C. P. G. Ft. Collins. Two specimens with data "Colo. 2195. 

 7-4-96 Larimer County C. P. G. One specimen with data "Colo. 2096. 

 5-9-96. Dixon Canyon (near Ft. Collins) C. P. G." One specimen with 

 data "Colo. 2805. 10-22-97, Belvue, Colo. Emma Gillette." One speci- 

 men with data "Colo. 2138. 6-15-96 Camp Carter, Colo. C. P. G. One 

 specimen with data "Colo. 2094. 5-7-96 Howes Gulch (near Ft. Collins) 

 C. P. G." One specimen with data "Ft. Collins, Colo. 6-i7-'99 E. D. 

 Ball, Horsetooth Gulch." 



Psylla pyricola. 



This economic species was present in large number in 1910 

 upon pear in Camden, Maine. The leaves were badly discol- 

 ored. Figures 398 and 434 show the wing and male cauda of 

 this insect. Me. 1326 Sub 4. 



Literature (for America). 

 1884 Riley, C. V. Pro. Biol. Soc. Wash. Vol. 2. 



1892 Slingerland, M. Y. Bui. Cornell Univ. No. 44. 



1893 Riley and Howard Insect Life, Vol. 5, p. 226. 

 1893 Lintner 9th Rept. p. 317. 



