796 Van Duzee: Catalogue of Hemiptera [2869iA- 



Patch, Me. Agr. Exp. Sta., Bui., p. 228, 1912. 



Crawford, U. S. Natl. Mus., Bui. 85, p. 89, 1914 (figures). 



helvetina Meyer-Diir, Mitth. Schw. Ent. Ges., iii, pp. 388, 391, 1871. 

 nigrifrons Crawford, Pomona Jl. Ent., ii, pp. 230, 351, 1910 (figures). 

 fulvida Crawford, Pomona Jl. Ent., ii, pp. 231, 358, 1910 (figures). 

 \\similis Crawford, Pomona Jl. Ent., ii, pp. 231, 359, 1910 (as var. of fulvida). 

 aurantiaca Ci'awford, Pomona Jl. Ent., ii, pp. 231, 360, 1910 (figures). 



Ci-awford, Pomona Jl. Ent., iii, pp. 426, 428, 628, 1911. 

 Wfrontaiis Crawford, Pomona Jl. Ent., ii, p. 232, 1910 (as var. of aurantiaca). 

 Host : Salix. 



Localities: 111., Colo., Utah, N. Mex., Nev., Calif., Ore., Wash. 

 (Europe.) 



28691/4. Trioza forcipula Patch 

 Patch, Me. Agr. Exp. Sta., Bui. 202, p. 227, 1912. 

 Host: Ulnius. 

 Localities: Ont., N. Y., Colo. 



28691/^. Trioza pyrifoliae Forbes 

 Forbes, 14th Kept. 111. St. Ent., p. 98, 1885. 

 Mally, Proc. la. Acad. Sei., ii, p. 154, 1895 (mention). 



Host : Pyrus. 



Locality : HI. 



2870. Trioza nigrilla Crawf. 



Crawford, Pomona Jl. Ent., iii, p. 503, 1911 (n.n. for nigra Crawf.). 

 \\salicis Mally, Proc. la. Acad. Sci., ii, p. 161, 1895. 



Crawford, Pomona Jl. Ent., iii, pp. 426, 428, 432, 1911 (figures). 

 Aulmann, Psyllid. Cat., p. 53, 1913 (listed). 

 Crawford, U. S. Natl. Mus., Bui. 85, p. 91, 1914 (figures). 

 Van Duzee, Clieck List Hemip., p. 86, No. 2870, 1916. 

 minuta Crawford, Pomona Jl. Ent., ii, p. 232, 1910. 



Crawford, Pomona Jl. Ent., iii, pp. 425, 427, 432, 1911 (figures). 

 llassimilis Crawford, Pomona Jl. Ent., ii, p. 233, 1910. 



Crawford, Pomona Jl. Ent., iii, pp. 426, 429, 438, 1911 (figures). 

 \\7iigra Crawford, Pomona Jl. Ent., ii, pp. 232, 258, 1910 (figures). 



Crawford, Pomona Jl. Ent., iii, pp. 427, 428, 1911. [minuta Crawf.). 

 \\similis Crawford, Pomona Jl. Ent., iii, pp. 425, 427, 433, 1911 (as var. of 

 flori Crawford, Pomona Jl. Ent., iii, p. 503, 1911 (n.n. for assimiUs Crawf.). 

 duhia Patch, Me. Agr. Exp. Sta., Bui. 202, p. 226, 1912. 

 pomonae Aulmann, Ent. Eundsch., xxix, p. 144, 1912 (n.n. for assimUis 

 Aulmann, Psyllid. Cat., p. 51, 1913 (listed). [Crawf.). 



louisianae Aulmann, Ent. Eundsch., xxix, p. 144, 1912 (n.n. for nigra 



Aulmann, Psyllid. Cat., p. 48, 1913 (listed). [Crawf.). 



Host: Salix. 

 Localities: D. C, la., Colo., Nev. Calif. Wash. 



287 1. Trioza varians Crawf. 

 Crawford, Pomona Jl. Ent., ii, pp. 231, 361, 1910 (figures). 

 Crawford, Pomona Jl. Ent., iii, pp. 425, 427, 628, 1911. 

 Crawford, U. S. Natl. Mus., Bui. 85, p. 91, 1914 (figures). 



Host: Salix. 



Localities: Colo., Utah, Calif., Albta., Brit. Col. 



