Subfamily Diaspinae. 

 Chionaspis citri Comst. 



This species is one of the most injurious scale-insect pests of the 

 ■citrus groves in Porto Rico. It was collected by Mr. Busck in 1899 

 ■''on lime" at Aiiasco (2-93) and is probably generally distributed 

 over the island. It has been treated by Messrs. Barrett (1-445), 

 Henricksen (8-27) and Tower (17-24, 25) (19-14, 15) in various 

 publications of the Porto Rico Agricultural Experiment Station as 

 an enemy of citrus trees. 



Doctor Howard has determined a parasite reared by the writer 

 from Chionaspis citri as Aspidiotiphagus citrinus (CraM".). 



Howardia hiclavis (Comst.). 



Collected by Mr. Busck "on Bixa orellana^' at San Sebastian 

 and Aiiasco. (2-93.) I have taken it on the same host, which is 

 known as "achiote, " "acliote, " and "annato," at Rio Piedras, and 

 in addition it has been collected as follows: On "caimito" (Clirijso- 

 phylluni cainito), and "mamey" {Mammea aniericana) , Mameyes; 

 on "algarrobo" (Hymenaea courharil), on Casearia arhorea, on sil- 

 A'er oak, an introduced tree {Grevillea rohusta), and on "West Indian 

 pigeon pea or "gandul" (Cajamis indicus), Rio Piedras; on "palo 

 de cucubano" {Guettarda scabra) and Cordia sp.. Dorado; on 

 "roble" {Tecoma pentaphylla) and Acalypha wilkcsiana at Naguabo; 

 on sapodilla or "nispero" {Achras sapota), Coffea arabica, Doryalis 

 cafra, and Plumiera rubra at Mayagiiez. 



Diaspis cchinocacti (Bouche.). 



Mrs. Fernald records this species from Porto Rico. As food- 

 plants in the various countries, where it occurs, the following are 

 given: Opuntia ficus-indica, Echinocactus ottonis, E. tenuispinus, etc. 

 (6-229, 230.) ]\Ir. Busck lists Diaspis calyptroides Costa var. opun- 

 iiae Ckll. as having been collected at Ponce. (2-93.) 



Aulacaspis pcntagona (Targ.). 



As is true elsewhere where it occurs, this coccid has a long list 

 of food-plants in Porto Rico. Among cultivated plants the '•'papaya" 

 or papaw suffers especially from its attacks. 



In 1899 Mr. Busck took it "on castor-oil plant. Rio Piedros 

 (perhaps a misspelling of Rio Piedras), January 17. On unknown 

 tree, Bayamon, January 16. On peach, Adjunctas (probably Ad- 



