ECONOMIC ZOOLOGY — ENTOMOLOGY. 461 



and P. mariatm; P. nigrce from New Hampshire on Picea mariana; P. piinc- 

 ticolUs from West Virginia on Picea rubens; P. murrayanw from Oregon on 

 Pinus murrayana ; P. coloradensis from Soutti Dakota and central Colorado on 

 Picea canadensis and probably on P. engelmanni; P. alascensis from Alaska 

 probably on Picea; P. burkei from Utah and Colorado on Abies lasiocarpa; P. 

 piperi from Washington, Idaho, and British Columbia on Abies lasiocarpa and 

 A. concolor; P. fraseri from North Carolina on Abies fraseri; and P. curriei 

 from British Columbia, the host unknown, probably Pinus. The other 7 species 

 recognized as occurring in North America are: P. sirobi, P. nemorensis, P. 

 fasc-iatus, P. costatus, P. rotundatus, P. dubiiis, and P. afflnis. 



The work concludes with a bibliography of 67 titles. 



Hosts of Strepsiptera, C. Robertson {Canad. Ent., Jf2 (1910), No. 10, pp. 

 323-330). — The author presents a list of 36 sijecies of Hymenoptera which he 

 has found to serve as hosts of Strepsiptera. 



Bees, R. Robertson (Canada Expt. Faryns Rpts. 1910, p. 331). — In wintering 

 experiments it was found that dysentery occurred in the hives of 3 colonies 

 that wintered on their sealed stores, though there was but very little and in 

 but one of 3 colonies that wintered on a sugar sirup made of granulated sugar 

 and water 2 : 1 by weight, the water being first boiled and the sugar then stirred 

 in. It is stated that the practice of placing colonies in cellars late in the fall, 

 removing the covers and quilts from the hives, then placing 3 empty grain bags 

 over each and raising the bodies from the bottom boards at their entrance 

 with 2 in. blocks has given such good results that it is being generally adopted 

 in Nova Scotia. This practice allows of such good ventilation that mildew 

 never appears on the frames. 



Aphelinus diaspidis, H. J. Quayle (.Jour. Econ. Ent., 3 (1910), No. 3, pp. 

 S98-J{01). — This article deals with the life history and bionomics of A. diaspidis, 

 the only parasite of the red or orange scale (Chrysomphalus aurantii) of 

 economic importance in California. 



" The duration of the egg stage is from 4 to 5 days, of the larval stage 12 to 

 16 days, and of the pupal stage 8 to 10 days. The adult, under nearly normal 

 conditions, usually died in 4 or 5 days." It has been found that this species 

 may reproduce parthenogenetieally. 



New parasites of the genus Meraporus, E. S. Tucker (Canad. Ent., 42 

 (1910), No. 10, pp. 3ffl-3fi6). — Three parasites are here described as new, 

 namely, M. utibiUs, collected in seed wheat, corn, and oats at Piano, Tex., con- 

 taining Calandra ory^^ce, and also bred from an ear of corn infested by C. (yryzce, 

 collected in a field near Shreveport, La.; M. vandinei, bred from rice infested 

 by C, oryzce, collected at Welsh and Lake Arthur, La., and Piano and El 

 Campo, Tex. ; and M. requisitns, bred with M. vandinei from the material col- 

 lected at Welsh, I.^, 



Life history notes and control of the common orchard mites Tetranychus 

 bimaculatus and Bryobia pratensis, (J. P. Weldon (Jour. Econ. Ent., 3 

 (1910), No. 5, pp. 430-Ji3.'i). — The hibernation of. summer habits, and control 

 measures for these species are described. See also a previous note (E. S. R., 

 23, p. 264). 



Spraying, W. T. Macoun (Canada Expt. Farms Rpts. 1910, pp. 150-154). — 

 In experiments conducted during the spring of 1909 a commercial brand of 

 lime-sulphur, diluted with water 1 : 11, did not destroy the eggs of the apple 

 aphis. Results obtained from spraying nursery stock with two commercial 

 insecticides, whale-oil soap and kei'osene emulsion, are briefly noted. 



In experiments conducted for the purpose of comparing Paris green with arse- 

 nate of lead and to show what quantity of the latter is the most economical to 

 use in combating the Colorado potato beetle, 1 lb. of Paris green to 40 gal. of 



