
Baker, A. D. 
. A study of the male genitalia of Cancdian species of Pentatomi-— 
dae. Canadian Journal of Research, v. 4, p. 143-220, illvs., pl. l- 
2, Feb. and Mar., 1931. (Macdonald College Rerrints No. ec.) At head 
of title: National Research Council of Canada. (Bibliography, p. 
217-220. ) 
Betrem, J. G. 
. Petroleumseepemulsies. 12 p., illus. Soerabaia; Van Ingen, 
19351. (Mededeelingen van het Proe*stations Malang 73 )] Overg ditkt, 
-* uit het Archief voor de koffiecultuur, 5e jaargang, isr..1, Mei, 1931. 
Bolsche, Wilhelm. 
Der Termitenstaat Schilderung eines geheimnisvolten Volkes 
eo fg p., illus. Stuttgart, Kesmcs, 1931. (Kosmos—bd :dchen) 
Bondar, Gregorio. 
. Batata doce. A sua cultura, as variedzdes conhecides na Pahia 
6 0S inimigos ...e indice para Boletins 1a10. 44 p., illus. 
Bahia, Imprensa official do estado, 1931. (Secretaria da agricul- 
‘tura, industria, commercio, viacao e cbras publicas do [s ado da 
Bahia. Bol. de Laboratorio de pathologio vegetal de esiede da B hia, 
no. 10, anno 1931.) (Bibliographia, p. 43-44. ) 
California Spray—Chemical Corporation. 
California citrus pests and their control; a description of various 
citrus pests of economic inportance in California, with general 
control recommendations. By William H. Volck . . . and Renald 
We on Ae. ec (Pesitlilius.; ports: .Berkeley,» Cabifornia 
Spray—Chemical Corporation, 1931. 
Citrus pest control in southern California. Written by Villiam H. 
Vobck..« .. « and, Ronald W.. Hunt. ..... « 24. p+, illus. Berkeley; 
California Spray—-Chemical Company, 1930. 
Citrus pest ccntrol in the San Joaquin and Sacramento valleys of 
California. 8p., illus. Berkeley, California Spray-Chemical 
Company, 1930. By R. W. Hunt, entomologist. 
Chrystal, R. N., and Skinner, E. R. 
Studies in the biology of Xylonomus brachylabris Kr., aid X. irri- 

‘eli Weise. -Forestry, v. 5, No.-1, p. 21-53, pl. I-II, June, 1951. 
(Literature references, p. 33.) 
Coleman, L. C. 
. Report on the coffee berry borer Stephanoderes hampei, Ferr ina 
Java. 26 p. incl. pl. Bangalore, Printed at the Government Press, 
1931. (Mysore State Dept. Agr. Gen. Ser. B. 16.) 
Fraser, H. M. 
' Beekeeping in antiquity. 157 p., illus., pl. Lordon, University of 
London Press, Litd., 1931. (Bibliography, p. 151-154.) 
Guillochon, Lucien. 
Culture des fruits du Midi et de l'Afrique du nord; utilisa- 
tion—commerce, par L. Guillochon [et] R. Guillochon. 544 p., illus. 
Paris, J. B. Bailliére et fils, 1931. (Half-title: Encyclo; édie 
agricole publiée sous la direction de G. Wery.) 
