40 PRINCIPAL CACTUS INSECTS OF UNITED STATES. 



The determinations in all cases have been made by the recognized 

 authorities in the different groups. We are indebted to the following 

 entomologists for assistance in this connection: E. A. Schwarz, 

 II. (i. Dyar, W. M. Wheeler. Otto Heidemann, W. D. Pierce. J. C. 

 Crawford, and S. A. Rohwer. Mr. Schwarz also rendered most 

 valuable aid in making suggestions throughout the course of the 

 work and in reading the manuscript and proofs. 



We are especially indebted to Prof. T. D. A. Cockerell for furnish- 

 ing complete lists of Opuntia bees and for making many suggestions 

 about the portion of the list dealing with the Coccidae. 



SPECIES WHICH INJURE THE PLANT. 

 ARACHNID A. 



Tetranychiis opunticr Banks. Reported by Mr. David Griffiths as injurious, but 

 not taken in present investigations. 



ISOPTERA. 



Terme8 flavipes Kollar. Sabinal, Tex., September (F. C. Pratt) ; Falfurrias 

 and Hondo, Tex. (J. D. Mitchell). 



Attacks young Opuntia plants, also Cereus: frequently nests in decaying 

 Opuntia and constructs covered galleries on joints. 



HEMIPTERA. 



Liotropis contaminatus Uhler. Tucson. Ariz.: El Taso, Tex. (H. F. Osborn). 



Feeding on fruit of Opuntia fulgida. 

 Chclinidea tahulata Burrneister. Durango. Aguascalientes. and Victoria, Mex. ; 

 Tucson, Ariz. ; Brewster Couuty, Devils River, Oakville, Victoria. Austin, 

 Hondo, and San Antonio. Tex. Throughout the season. 

 Feeds on joints. 

 Chelinidea vittigera Uhler. Colorado, Abilene, San Antonio. Knickerbocker, 

 Trinity, Cotulla. Tivoli. Boerne, Encinal. Victoria. San Diego, Kerrville. 

 Dallas, Oakville. Chisos Mountains, Mineral "Wells, Hallettsville. Sabinal. 

 Hondo, Falfurrias. Laredo, Fredericksburg, El Paso, and Austin. Tex. 

 Throughout the season. 

 Feeds on joints. 

 Chelinidea sp. Tucson. Ariz., May < F. ('. Pratt). 



Feeding on joints of Opuntia fulgida. 

 Largus sueeinctus Linnseus, San Antonio, Tex.. July (F. C. Pratt). 



Feeding on joints of Opuntia arborescens. 

 Lopidea cuneata Van Duzee. Los Angeles, c'al.. June I F. C. Pratt >. 



Feeds on joints of Opuntia. 

 Oncerometopw nigriclavus Router. Kerrville. Tex.. August (F. C. Pratt); 

 D'Hanis, Tex.. April (J. I>. Mitchell). 

 Feeding on joints of Opuntia. 

 Hadronema robusta Uhler. San Antonio. Tex.. June (J. C. Crawford). 

 Feeding on joints of Opuntia. 



