THE MONTHLY BULLETIN. Ill 



Eggs — Pale yellow, rather small and laid in loose M-hite cottony 

 masses. 



Filaments — The lateral filaments are very short, while the anal fila-. 

 ments or tails are from one fourth to one half as long as the body. 



Food Plants — The food plants of this species are varied and the list is 

 gradually increasing. So far we have recorded it upon the following: 

 elder {Sainbucus glaiica), Grevillea sp., English Ivy {Iledera helix), 

 lemon {Citrus meclica limon), Mexican orange {Clwisxja ternata), night- 

 shade (Solanum douglasii), orange (Citrus anrantium); pear (Pyrus 

 communis), potato (Solanimi tuherosvm), potato vine (Solanum jas- 

 mi)ioides), Japanese quince (Cydonia japonica), wild sunflower (Tleli- 

 anthus annuus), walnut (Juglans regia), and willow (Salix sp.). 



Distribution — To the writer's knowledge this species is quite common- 

 in Ventura, Los Angeles and a portion of San Bernardino County 

 adjacent to Los Angeles County. 



Economic Importance — This species, though native to southern Cali- 

 fornia, promises to be one of economic importance, since in many local- 

 ities it has been found in considerable numl^ers upon citrus and decidu- 

 ous fruit trees. It was first observed upon lemon trees at Oxnard, 

 Ventura County, by the writer in 1910. In 1913 R. S. Vaile. County 

 Horticultural Connnissioner of Ventura County, found it quite exten- 

 sively distributed in the orange orchards in upper 0,iai Valley, Nord- 

 hoff, Cal. In December, 1913, Commissioner S. A. Pease of San 

 Bernardino County located the severest infestation, so far found, in the 

 citrus groves at Upland, Cal., and the presence of the pest there caused 

 much excitement and no little damage in an effort to completely exter- 

 minate it. As this species is a native form it has undoubtedly been 

 held in check by natural enemies, and while it may prove to be somewhat 

 serious in certain instances it ought not 1)ecome a general, serious pest. 

 Its presence should be carefully watched and control measures adopted 

 whenever it becomes an economic factor in the production of the crop. 



THE CITRUS MEALY BUG. 



Pseudococcus citri (Risso). 

 (Figs. 27-31.) 



Color — The body is light yellow and completely hidden by a thick 

 Avhite cottony secretion. 



Eggs — Light yellow, oval, very small and laid in large loose white 

 cottony masses. 



Filaments — The lateral filaments are short but distinct. The anal 

 filaments or tails are little if any longer than those along the sides. 



Food Plants — This is a very omnivorous feeder and is found in nearly 

 every greenhouse of the United States and in many parts of the world. 

 The list of host plants herein presented is very incomplete, but are all 

 that have so far been definitely reported. Rex begonia, Bignonia sp., 

 bottle brush (Callistemon lanceolatus), Bouvardia sp., citron (Citrus 

 medica gcnuiana), coffee (Coffea- arabica), Coleus sp., cotton (Gos- 

 sypium sp.), crane's-bill (Geranium, sp.), deer-brush (Ceanothus inte- 

 gerrimus), ferns (Filicales), Fuchsia sp., grape (Vitis vinifera), 

 Guadalupe Island palm (Erythea edulis), Habrothamnus sp., English 

 ivy (Iledera helix), lemon (Citrus medica limon), moon flower (Ipo- 



