262 EXPERIMENT STATION RECORD. [Vol.40 



bordering Lake Ontario from Burlington to the Niagara River. Many pear 

 growers have found it to be the most troublesome insect with which they have 

 to contend. 



The jumping plant lice (family Psyllidae) of the Hawaiian Islands, D. L. 

 Cbawford (Proc. Hawaii. Ent. Soc, 3 (1911), Xo. 5, pp. 480- ',57, figs. 23).— 

 The author describes 11 species representing 5 genera as new to science and 

 gives tables for their separation. The genua Cerotrioza is erected. 



The California species of mealy bugs. G. 1'. Febeis (Lcland Stanford. Jr., 

 Univ. Pubs., Univ. Set:, 1918, pp. 78, pis. 3, figs. 16).— The author first describes 

 the methods of study and the taxonomic value of morphological characters, 

 secretions, and biology of California species of mealy bugs. A systematic treat- 

 ment is then presented, including a synonymical list of names applied to Cali- 

 fornia species, keys to the nine genera represented and to the species, and 

 descriptions of the genera and species. Nine species, representing the genera 

 Pseudococcus, Phenacoccus, Trionymus, and Heterococeus n. g., are described 

 as new to science. 



Contributions to the knowledge of the family Chennesidse. — I, The biology 

 of the Chermes of spruce and larch and their relation to forestry. II. M. 

 Steven (Proc. Roy. Soc. Edinb., 37 (1916-17). Xo. .',. pp. 856-881, figs. 6; abs. in 

 Rev. Appl. Ent., Ser. A, 6 (1318), Xo. .',, pp. 154 -Thia is an introductory 



report of studies of the genus Ohermes and its allies In Great Britain. 



"The nonmigrating species of the genera Chermes a str. and Cnaphalodea 

 are more serious enemies to spruce than are the migrating species. The 

 species of Chermesidse, however, are only serious enemies of spruce when allied 

 with unsuitable soil or atmospheric condltiona The collective damage to larch 

 by the colonici of the species of Ohermes a str. an I Cnaphalodea and the 

 progredlentes of Cnaphalodes is serious In Britain. 



"The fumigation of coniferous nursery stock before dispatch to the planting 

 area has proved a practical method of limiting the further distribution of 

 these pests, and of insuring that the plants get a reasonable chance of estab- 

 lishing themselves in their new environment." 



A bibliography of 51 titles is included. 



Phylloxera (Dept, Apr., Indus., rt Cow. [Vavd], Rap. Sin. Vit. et Scrv. 

 PhyHo.rrrique, 1915, pp. 60; 1916. pp. 62).— These .ire annual reports of the 

 Vlticultural Station and Phylloxera Service on the work conducted during 1915 

 and 1916. 



Some Japanese Aphididse. E. O. Esstr, and S. I. Kvwana (Proc. Cal. Acad. 

 Set., 4- ser., [Zool.], 8 (1918), Xo. 3. pp. 35-112. figs. 40).—In this paper the 

 authors report upon Japanese Aphididse collected at or in the vicinity of Tokyo 

 during 1913. A host index to the species listed is lirst presented, followed 

 by notes and descriptions of the species, including 24 new to science. Studies of 

 Japanese Aphididae by Matsumura have been previously noted (E. S. R.. 40. 

 p. 60). 



Our birch Symydobius distinct from the European. A. C. Baker (Canad. 

 Ent., 50 (1918), Xo. 9, pp. 318-320). — The author finds the American form to be 

 distinct from Symydobius oblongus of Europe, and describes it as representing 

 a new species under the name S. amerioanu*. 



On the transmission of the subtertian malaria parasite (Plasmodium falci- 

 parum) by Egyptian Anopheles, P. H. Bahk (.four. Roy. Army )!<<!. Corpt, 30 

 (1918), No. 6, pp. 606-608). — The author found that Anophetot [Myzomyim) 

 turkhudi is an efficient definitive host of the subtertian malaria parasite in 

 Bgypt "A. (CcWa) pharoenrts can ad as an Inefficient and occasional defini- 

 tive host for the subtertian parasite. This fact is of interest in view of the 



