CONTENTS 



Page. 



Introduction • 39 



Classification of California Tliysanopteru 42 



Key to the suborders and families 42 



Key to the genera 42 



Key to the species 43 



Family iEolothripida^ 45 



Genus Orothrips 45 



Genus ^olothrips , 47 



Fapaily Thripid;e 40 



Genus Sericothrips 49 



Genus Heliothrips 51 



Genus Euthrips 52 



Genus Parthenothrips 57 



Genus Thrips 57 



Family Phlceothripidas 60 



Genus Trichotlirips 60 



Genus Acanthothrips 64 



Genus Megalothrips 65 



Genus Cryptothrips 6G 



List of California Thysanoptera and their food jilants 67 



L LUST RAT IONS 



Page. 



Plate I. Fig. 1 . — Orothrips keUog(jii: head ami i)rothorax of female 50 



Fig. 2. — OruUirips kelloggii: left antenna of female 50 



Fig. '■i.—Orotkrips kelloggii: right fore wing of female 50 



Fig. 4. — Orothrijjs kelloggii: fore tarsus of female 50 



Fig. 5. — ^Eolothrips kuwanaii: head and prothorax of female 50 



Fig. 6. — jEolothrips kuivanaii: right antenna of female 50 



Fig. 7. — jEolothrips kuwanaii: right fore wing of female 50 



Fig. 8. — ^Eolothrips kuwanaii: fore tarsus of female 50 



Fig. 9. — Sericothrips reticulatus: head, prothorax, and niesothorax 



of female , 50 



Fig. 10. — Sericothrips reticulatus: end of abdomen of female 50 



II. Fig. 1 1. — Sericothrips stanfordli, female 52 



Fig. 12. — Heliothrips fasciatus: head and prothorax of female 52 



Fig. 13. — Heliothrips fasciatus: right antenna of female 52 



Fig. 14. — Heliothrips fasciatus: end of abdomen of female 52 



Fig. 15. — Euthri])S orchidii: head and prothorax of female 52 



Fig. 16. —Euthrips orchidii: right antenna of ferdale 52 



Fig. 17. — Euthrips orchidii: end of abdomen of female 52 



Fig. 18. — Euthrips orchidii: right fore wing of female 52 



V 



