28 NORTH AMERICAN THYSANOPTERA. 



(54) Euthripa tritici Fitch, 1855. (For description, life-history notes, and references, 



see Hinds, Mon. Thys. N. Amer., Proc. U. S. Nat. Mus., vol. 26, p. 149, 1902.) 

 Habitat: Generally distributed throughout the United States. 

 Taken in flowers of almost all wild and cultivated plants. 

 Note. — This is undoubtedly the commonest and the most widely dis- 

 tributed of all American species of thrips. The variation within the species 

 will probably lead some later writer to divide the group into several distinct 

 varieties. The insect varies from very light colored, almost white individuals 

 (which for the most part are collected in white or light colored flowers) to very 

 dark brown, and from individuals with no shading of orange to those colored 

 to a deep red-orange. The writer is here erecting one new variety, to include 

 the very dark brown specimens in this group. These can not possibly be 

 included within the species as Mr. Hinds's description now stands. The 

 variety is called Euthrips tritici calif ornicus. 



(55) Euthrips tritici calif ornicus new variety. 



Habitat: California, Oregon, and Washington. 



Taken in company with Euthrips tritici, in the blossoms of almost all wild 

 and cultivated plants. The variety is distinguished from the species by the 

 following characters: General color uniformly dark brown, thorax orange- 

 brown; segment 1 of antennse brown, unicolorous with head, segment 2 uni- 

 formly darker brown. 



19. Genus ANAPHOTHRIPS TJzel. 



(56) Anaphothrips striatus Osborn, 1883. Redescribed by Hinds, Mon. Thys. 



N. Amer., Proc. U. S. Nat. Mus., vol. 26, p. 160, figs., 1902. Ref.: Ent. News, 

 vol. 20, p. 224, May, 1909 (males found). 



Habitat: Illinois; Iowa; Maine; Massachusetts.; New York; Ohio; Ontario; 

 Nebraska; California. 



Food plants: Poa pratensis, Phleum pratense, and other grasses; in Cali- 

 fornia on leaves and ears of corn, and on alfalfa. 



(57) Anaphothrips zero new species. (For description see p. 41, PI. IV, figs. 31-34.) 



Habitat: Visalia, San Jose, and Red Bluff, Cal. 



Taken on leaves and ears of corn, on grasses, and on foliage of orange. 



(58) Anaphothrips tricolor new species. (For description see p. 41.) 



Habitat: Tulare County, Cal. 



Taken on goldenrod and on orange nursery stock by Mr. P. R. Jones. 



20. Genus PSETJDOTHRIPS Hinds. 



(59) Pseudothrips inequalis Beach, 1896. Redescribed by Hinds, Mon. Thys. 



N. Amer., Proc. U. S. Nat. Mus., vol. 26, p. 146, figs., 1902. 

 Habitat: Ames, Iowa. 

 Food plant: Aster. 



21. Genus HETEROTHRIPS Hood. 



(60) Heterothrips saUcis Shull, Ent. News, vol. 20, p. 220, figs., May, 1909. 



Habitat: Huron County,. Mich. 



Taken on the outside of catkins of a willow (Salixfluviatilis). 



(61) Heterothrips arisaemse Hood, Bui. 111. State Lab. Nat. Hist., vol. 8, art. 2, 



p. 362, August, 1900. 

 Habitat: Urbana, 111. 

 Taken in flowers of jack-in-the-pulpit (Arissema triphyllum). 



