140 U.S. NATIONAL MUSEUM BULLETIN 25 6 



Dactylopius confusus Cockerell: Florida, Kansas, and Colorado to 

 Wyoming and Utah. Host plants, many species of shrub and dwarf 

 prickly pears, 



Dactylopius sp. near confusus Cockerell: Argentine. Host plants, 

 many species of Opuntia of varying types. This Argentine form appears 

 to possess taxonomic characters of specific value. 



Dactylopius ceylonicus Green (=D. argentinus Dominguez, D. indicus 

 Green, and D. capensis Green): Argentina, Uruguay, and Brazil; host 

 plants, various species of Opuntia. Naturalized in South Africa, India, 

 Ceylon, Australia. 



Dactylopius newsteadi Cockerell: United States and Mexico. Host 

 plants, various species of Cylindropuntias. 



Dactylopius greenii Cockerell (=D. confusus capensis Green): Natur- 

 alized in Sovith Africa; origin unknown, but almost certainly South 

 America. This species may be identical with the unnamed Argentine 

 species. 



In our investigations D. argentinus Dominguez has not been recognized ; 

 it must represent either D. ceylonicus (Green) or the unnamed Argentine 

 form. 



Our D. opuniiae Lichtenstein material, which was recently (1966) 

 submitted to Dr. D. J. Williams, Commonwealth Institute of Ento- 

 mology, has been referred by him to D, confusus Cockerell. The 

 material was reared in Australia on Opuntia inermis, 0. tomentosa, and 

 0. streptacantha. Dr. Williams agrees with our name of D. ceylonicus 

 for the species on 0. monacantha and with Dactylopius sp. near confusus 

 Cockerell for the form on 0. aurantiaca. He believes that D, newsteadi 

 Cockerell is a synonym of D. confusus Cockerell. 



UNDETERMINED SPECIES 



The identity of cochineal found in the West Indies and in northern 

 Brazil has not been ascertained. 



In the West Indies cochineal was found sparsely on 0. dillenii in 

 Jamaica, but 0. spinosissima and 0. jamaicensis growing in the vicinity 

 were not infested. In Haiti a few cultures were seen on the tree pear 

 0. spinosissima, but none was discovered on the exceedingly common 

 0. dillenii, 0. antillana, 0. taylori, and 0. caribaea. In the Dominican 

 Republic few individuals were noticed on the tree pear 0. catacantha; 

 but the low- growing 0. antillana and 0. taylori and the tree pear 0. 

 caribaea, which are extremely abundant, were not recorded as host 

 plants. 



In the interior of the Brazilian States of Bahia and Pernambuco, 

 cochineal was observed fairly generally on the upright 0. palmadora 



