Entomologist of the Experiment Station of the Porto Rico Sngar 

 Producers' Association, and Mr. J. R. Johnston, formerly Plant 

 Pathologist of the same station. Both have collected a number of 

 species and Mr. Johnston has made the determinations of many of 

 the host-plants. Since the time of my leaving Porto Rico my suc- 

 cessor, Mr. G. N. Wolcott, has added some data to the list. Mr. 

 R. T. Cotton of the same station, and INIr. R. H. Van Zwaluwenburg. 

 Entomologist of the Porto Rico Agricultural Experiment Station 

 at Mayagiiez, have also added a number of new records from recent 

 determinations. 



The system that has been followed in making up the bibliography 

 may be explained as follows: After each reference to records of 

 other Avriters in the text, one or more numbers will be found in 

 parentheses. The first number refers to the number preceding the 

 author's name in the "Bibliography," found at the end of the list. 

 The number, or the numbers, that may follow the first number indi- 

 cates the page, or pages, on which the particular reference will be 

 found. 



In preparing the list ]Mrs. Fernald's catalogue of the Coccidae 

 of the world has been followed. Special effort has been made to 

 give the correct Latin names of the host-plants with the heretofore 

 unpublished notes. The local Spanish common names of plants, given 

 in quotations, are from the "Flora Portoricensis," by Professor Igna- 

 tius Urban, and the paper by Cook and Collins, ' ' Economic Plants 

 of Porto Rico," published by the Smithsonian Institution. 



Subfamily Monophlebinae. 



Icerya montserratensis Riley and Howard. 



]Mr. Busck collected it in 1899 "on orange, IMayagiiez, January 

 20," and on the same host at Bayamon. (2-92.) Mr. Tower re- 

 corded it in 1908 on the orange. (16-38.) Taken . at Santurce 

 (near San Juan) on twigs and undersides of leaves of an undeter- 

 mined tree ; at Rio Piedras on the undersides of leaves of ' ' caimito, ' ' 

 Chrysophyllum argenteum Jasq., and at Mayagiiez on ''maricao" 

 (Byrsonima spicata), Casearia sylvestris, coconut palm (Cocos nuci- 

 fera), "guama" (Inga laurina), "guava" {Inga vera), "saman" 

 (Pithecolohium saman), and guava or "guayaba" (Psidium guajava). 



Subfamily Ortheziinae. 

 Ortkezia insignis Dougl. 

 Collected on an undetermined plant at Dorado, on Eupatonum 



3 



