42 PRINCIPAL CACTUS INSECTS OF UNITED STATES. 



Dactylopius confusus Cockerell. (Cottony cochineal insect.) Throughout the 

 cactus region from Graham County, Ariz., southward, Texas, Florida, and 

 California. 



Feeds on joints of all species of Opuntia. 

 Also present in hothouses throughout the country. 

 Dactylopius (Coccus) near confusus. Barbados, W. I., May (D. D. Morris). 

 Dactylopius coccus Costa. (Cochineal insect.) Recorded from California and 

 Florida, but probably introduced. Introduced in West Indies, Canaries, 

 India, Peru, Spain, and other Mediterranean countries. 

 Dactylopius foment osus Lamarck. Guanajuato, Mex., July (T. D. A. Cockerell ) ; 

 New Mexico; Arizona. 

 On Opuntia fulgida joints. 

 Dactylopius (Coccus) sp. Cape Town, South Africa (A. M. Cooper). 



On Opuntia polyantha. 

 Dactylopius (Coccus) sp. Colorado Desert, Cal., January (D. W. Coquillett). 



San Bernardino, Cal. 

 Pseudococcus virgatus Cockerell. Brownsville, Tex. 



On "Jacobo" cactus. (See also Cockerell, Can. Ent, 1S95, p. 259.) 

 Pseudococcus obscurus Essig. California. 



On roots of Opuntia. 

 Pseudococcus longispinus Targioni-Tozzetti (Syn. : Dactylopius longifilis Corn- 

 stock ) . 



(See Lintner, 2d N. Y. Report, p. HO.) 

 On prickly pear at Waterbury, Conn. 

 Pseudococcus sp. Mesilla Park, N. Mex., April (D. Griffiths). 



On joints of Opuntia cycloides. 

 Ripersia sp. 



On roots of cactus. 

 Diaspis cacti Comstock. Arizona and New Mexico. 



On Opuntia fulgida, O. arborescens, and O. cngelmanni. 

 Diaspis cacti opunticola Newstead. Demarara. 



Diaspis ccliinocacti Bouche. According to Mrs. Fernald, Europe, India, Algeria, 

 Porto Rico, Mexico, New Mexico, New York. 



On Opuntia ficus-indica, Echinocactus ottonis, and E. tcnuispinus, etc. 

 Diaspis ccliinocacti cacti Comstock. Laredo, Tex., March, on Opuntia leptO- 

 caulis and 0. lindhcimcri (F. C Pratt) ; San Antonio. Tex. (J. D. Mitch- 

 ell) ; Arizona and New Mexico, on O. fulgida, 0. arborescens, and 0. engel- 

 manni (T. D. A. Cockei-ell). According to Mrs. Fernald, Massachusetts 

 and New York (greenhouses), Iowa, Arizona, New Mexico, Brazil, India, 

 Mauritius, on Cactus, Cereus giganteus, C. macrogonus, Echinocactus sp. 

 Diaspis eehinoeacti opuntice Cockerell. Kingston, Jamaica (T. D. A. Cock- 

 erell) ; Sierra Blanca, Tex., on Opuntia arborescens (C. H. T. Townsend) ; 

 Demarara. Texas, Mexico, on O. arborescens and O. elongata. 

 Pseudoparlatoria parlatorioides Comstock. Frontera, Mex. (C. H. T. Town- 

 send ) . 

 Lepidosaphes (Opuntiaspis) philocoecus Cockerel). On Opuntia in Mexico, ac- 

 cording to T. D. A. Cockerell in litt. 



COLEOPTERA. 



Trichochrous (PristosceUs) texanus Le Conte. Albuquerque, N. Mex., June, 

 Zavalla County, Tex. (F. C. Pratt) ; D'Hanis and Brownsville. Tex. (J. D. 

 Mitchell). 



Occurs in great numbers in blooms, which are sometimes considerably 

 injured. 



