ENTOMOLOGY. 653 



and another in July, wliicli will in nio>!t cases be sufificient. Soap 

 mixcfl with the solution was lound to a(hl slightly to its insecticidal 

 value. 



Farm practice and fertilizers as insecticides, J. B. Smith 

 {Oiitdrio Eiif. kSoc. L'pt. 181)3, pp. iiS-70). — This paper treats of combat- 

 ing- injurious insects by means of cultural methods, chief among which 

 are suggested manuring with chemical fertilizers, titrate of soda and 

 kainit are considered especially valuable, and the peach aphis, corn 

 web worm, cabbage maggot, and wireworm are stated as insects against 

 which these chemicals have been used efl'ectively. Intelligent rotation 

 of crops is also suggested. 



Experiments with Botrytis tenella for destroying white grubs 

 {Dent, landic. Fresse, -^1 {1SU4), Xo. SS, pp. 838, 8:^9).— Four cages 

 weie made and the bottoms filled with earth, in which lettuce was 

 planted, and after the plants were growing vigorousl}'^ 25 white grubs 

 were introduced into each cage. The grubs were buried at different 

 depths in the earth, and 2 of the cages were kept very moist, while 

 the other 2 were allowed to become quite dry. Two grubs were then 

 infected with Botryfis\ by being shaken up in a test tube with water 

 and spores of the fungus, and placed one in a moist and the other iu 

 a dry cage. Two mouths afterwards the cages were examined, and 

 though the experiment was interfered with by a severe mortality of the 

 grubs, occurring in the check cages as well as in those infected, yet, 

 since only 2 grubs remained alive in the infected damp cage as against 

 several in the others, the destructive power of Botrytis under moist 

 conditions is believed in. The fungus did uot seem to act in the dry 

 cage infected. 



Tlie spermatogenesis of the silkworm, K. Toyama (CoUcc/e of Jgr., ToJojo, 

 Japan, Bid., vol. .'.', Xo. 3, pp. l:2'<-lo7, ph. 2). — Technical euibryological, anatomical, 

 and })liysiological notes of investigations of this subject, with extensive figures. * 



The dragon fly, T. J. MacLaughlin {Ontario Ent. Soc. Ept. 1893, pp. 55-60, fiys. 

 6). — Setuipopular descriptive and systematic notes on some of the common dr;igon 

 flies, tlieir habits and effectiveness iu destroying mosquito larvae being particularly 

 dwelt upon. 



Mosquitoes, J. A. Moffat {Ontario Ent. Soc. Ept. 1S9S, pp. 4.?-^<S).— General and 

 p(»])ular notes on the geographical distribution and life history of Culex pipiens, 

 with a discussion of the anatomy of the mouth parts and the physiological action 

 of the bite. Enrniug pyrcthrum powder in the house is recommended, as also grow- 

 ing castor beans and treating stagnant pools with kerosene. 



Effects produced by ticks upon their hosts ( Jj//. Jonr. Leeward Islands, 1S94, 

 Oct., pp. 30-44). 



The cheese or meat skipper, M. E. Muktfeldt {Ontario Ent. Soc. Rpt. 1S93, pp. 

 9S-101). — Notes on the history, ravages, and life history of Piophila casei, the use.of 

 screens being advised as a preventive. 



A new scale insect found on plum, T. D. A. Cockerell (Canadian Ent., 21 

 {1895'), No. 1, pp. lG-19). — Aspidiotus liowardi is described as a new species from 

 Colorado. 



The bud moth, M. V. Slingerland {New York Cornell Sta. Ept. 1893, pp. 27-52, 

 figs. 5).— A reprint of Bulletin 50 of the station (E. S. R., 4, p. 930). 



