COCCID^ OF THE HAWAIIAN ISLANDS. 229 



Kept in check by a Chalcid parasite and by a ladybird, Platy- 

 naspis nigra. 



36. PsEUDAONiDiA DUPLEX (Cockerell). — Eepeatedly introduced 

 from Japan, but apparently not established. I have recently 

 seen it on camellia plants from Japan. 



37. AuLACASPis Ros^ (Bouche). — Very common on rose trees 

 all around Honolulu. 



38. A. PENTAGONA (Tozzetti). [Howardia prunicola and 

 Diaspis patelliformis] . — Of little importance. 



39. Diaspis boisduvalii (Signoret). — Of little importance. 



40. D. BROMELi^ (Kerner).— Collected by Dr. Eeh, of Ham- 

 burg, in 1902 [9] in Honolulu, and recently discussed by Mr. 

 Van Dine lH] • 



41. Howardia biclavis, Comstock. — Always badly parasitised. 



42. Phenacaspis eugenic (Maskell).— Kept in check by 

 RhyzohiiLs sp. Often occurring in numbers on oleander leaves, 

 but apparently doing little harm to the tree. 



43. FiORiNiA FioRiNi^ (Boisduval). — Kept in check by 

 Rhyzohiiis sp. 



44. IscHNASPis LONGiROSTRis (Siguoret). — Near Honolulu on 

 palms. If this scale has been previously recorded from these 

 Islands, the notice must have been published in the daily press. 

 " The most easily recognized of scales, appearing as a short 

 black line on the leaf it infests " (Cockerell, 1897, Bull. Bot. 

 Dep. Jamaica (N. S.) iv. p. 150). 



. 45. Parlatoria proteus (ruricola). 46. P. pergandii, Comstock. 



47. P. zizYPHUs (Lucas). 



48. Lepidosaphes pinn^eformis (Bouche). 



49. L. pallida (Maskell). 50. L. ulmi (Linne). 

 These last six are apparently of little importance. 



51. L. GLOVERii (Packard).— Does not seem of much import- 

 ance. 



52. L. BECKii (Newman), [citricola] . — On various species of 

 Citrus over all the Islands, but the damage is more apparent 

 than real, in some places at least, as this species is almost 

 always badly parasitised, and is also preyed on by the ladybird, 

 Platynaspis )iif/ra. It occurs sparingly on citrus fruits imported 

 from the mainland. Occurred in large numbers with L. gloverii 

 and Calymmata longidiun, on citrus fruits from China and Japan. 

 Thus, instead of the former widespread havoc caused by the 

 scale-bugs, and especially by the mealy-bugs, we have now only 

 three, or at most four, species that can be considered really 

 destructive, except sporadically ; so much so, that unless one 

 secures examples of many of the species when they do appear 

 for a short time, one has to wait often many months for their 

 reappearance. 



53. L. CROTONis (Cockerell). — Honolulu, on Croton. Pre- 

 viously recorded only from Jamaica. 



