187 



quarantine and other restrictive orders. The chief insect pests dealt 

 with inckide the Japanese beetle [Popillia japonica] and the European 

 corn borer [Pyrausta niibilalis], in connection with which the present 

 position is reviewed. 



The ])ink bollworm [Pectinophora gossypiella] was not found in any 

 area previously infested, and this was probably owing to the active 

 control measures undertaken in connection with the 1918 crop. 

 Cle:irino;-up operations were begun as soon as possible in the newly 

 infested districts, and although the planting of cotton for 1919 under 

 adequate safeguards was permitted owing to the remoteness of the 

 infested zone from other cotton areas, the district in question is to 

 remain a strictly non- cotton zone for as long a period as necessary. 



Ferris (G. F.). The California Species of Mealy Bugs. — Leland 

 Stafford Junior Univ. Publications, Cal., 1918, 78 pp., 3 plates, 

 16 figs. [Received 3rd March 1920.] 



The author emphasises all the points in a previous paper made 

 [R.A.E., A, V, 407] in connection with methods of identifying mealy- 

 bugs. He disregards biological in favour of morphological evidence 

 for taxonomic purposes, because the former, not being fully understood, 

 is often misleading. Under the term " mealy bugs " the following 

 genera are included : Antonina, Cri/ptoripersia, Erium,, Geococcus, 

 Lachnodius, Natalensia, Phenacoccus, Pseudococcus , Rhizoecus, Riper sia, 

 Ripersiella, Trabutina, Trionymus and Tylococcus. 



One new genus, Heterococcus, is erected, and the following new 

 species are described : — Pseudococcus cupressicolus on Cupressus 

 guadelupensis and C. arizonicus ; P. longisetosus on underground 

 stems of Castilleja foliolosa and Orobanche tuberosa, and roots of 

 Armeria vulgaris ; P. quercicolus on Quercus chrysolepis, Q. agrifolia 

 and Pasania densiflora ; Phenacoccus eriogoni on Eriogonum nudum ; 

 P. solani on roots of Hemizonia rudis, potato, tomato, and a variety 

 of wild plants ; Heterococcus arenae on Poa douglasi ; Trionymus 

 bromi on Bromus sp])., Amjnophila arenaria and Ericameria fasciculata ; 

 T. distichlii on Distichlis spicata ; and T. grindeliae on roots of 

 Grindelia robusta. 



Keys are given to the Cahfornian genera and species. 



Ferris (G. F.). A Contribution to the Knowledge of the Coccidae 

 of Southwestern United States. — Leland Stanford Junior Univ. 

 Publications, Ccd., 1919, 68 pp., 38 figs. [Received 3rd March 

 1920.] 



This paper consists chiefly of redescriptions of named forms. 



The following new species are described : — Orthezia nuda on Quercus 

 emoryi ; Fonscolombia yuccae on a broad-leaved Yucca ; Lachnodius 

 salicis on Salix S]). ; Pseudococcus lycii on Lyciumsp. ; Riper sia hilariae 

 on a perennial grass, probably Hilaria cenchroides ; Aclerda ariditatis 

 on a perennial grass, probably H. cenchroides ; Protodiaspis tridentata 

 on Prosopis velutina ; P. edentata on Acacia greggii ; Pseudodiaspis 

 atriplicis on Atriplex spp. ; P. condaliae on Condalia spathulata ; 



(673) b2 



