THE CANADIAN ENTOMOLOGIST. l51 



with Dr. Roisduval's description. Hic spots of secondaries are pale yel- 

 low, very large, making a confluent band. I should place Onxo/tia 

 between this species and the Couivia group. 



I tabulate these species as follows: i. Ruricola ; 2. Ore- 

 gonia; 3. Columbia; 4. Colorado; 5. Colorado var. Idaho; 6. 

 Nevada; 7. Manitoba; 8. Juba ; 9. Juba var. Viridis. 



There is a recent description of what is called Pamphila Calikornica 

 n. sp. iMabille, Ann. de la Soc. Ent. de Belg. v. 27, p. 68, taken from one 

 male only, and which lacks definiteness. 1 can find nothing to which it 

 applies. Of the under side, it reads : " the secondaries are ochraceous, 

 and one or two points of a i)ale yellow color can with difficulty be dis- 

 tinguished among the nervules." So that it cannot be one of this group we 

 have been considering. 



NOTES ON THRIPID.^, WITH DESCRIPTIONS OF NEW 



SPECIES.* 



by HERBERT OSBORN, AGRICULTURAL COLLEGE, AMES, IOWA. 



The family Thripid^e, though possessing many characters of peculiar 

 interest, and being of no little importance economically, has received but 

 very little attention from American Entomologists, either systematic or 

 economic. \\'ith the exception of a few notes upon their habits, and 

 descriptions of some four or five species by Dr. Fitch, and also a few 

 notes by Mr. AN'alsh and Prof. Riley, concerning their food habits, scarcely 

 anything has been written of our native species. 



Without going into a discussion of the classification of the group, or 

 the peculiar characters which seem to ally it to different orders, it will be 

 sufticient here to state that the wings are entirely membranous and folded 

 flat upon the back, which, with the general conformation of the body, 

 would seem to place it with the Homopteroiis division of the Hemiptera. 

 The mouth parts, however, are free, composed of both mandibles and 

 maxillae, and the maxillse and labium are palpigerous — characters very 



* Read before the Iowa Academy of Sciences, Sept. 5, 1882. Since this paper 

 was' read, Mr. Theo. Pergande, of Washington, has kindly examined my specimens 

 and corrected some errors which had crept in, on account of my scanty Hterature on the 

 subject and lack of types. 



