460 



proved effective when the roots were immersed in water with a higher 

 temperature than 120'' F. for 15 minutes. The hot water apparently 

 had a detrimental effect on the growing plants, but in the winter the 

 plants could probably withstand higher temperatures and longer 

 exposures. 



Morse (W. J.). The Transference of Potato Late Blight by Insects. — 



Phytopathology, Baltimore, Md., xi, no. 2, February 1921, 

 pp. 94-96. 



A case of late blight on potatoes is described in which the flea-beetle, 

 Epitrix cucumeris, Har., and Macrosiphum solanifolii, Ashm. (potato 

 Aphid), are suspected as mechanical carriers. No positive evidence 

 was obtained of the spores of the fungus adhering to the Aphids ; 

 but the flea-beetle may act as carrier, though it does not always do so, 

 when taken from plants producing an abundance of the conidia of 

 late blight. 



Weiss (H. B.). Notes on the Larval and Pupal Stages of Xylorydes 

 satyrus. Fab. (Col. Scarabaeidae). — Ent. News, Philadelphia, 

 Pa., xxxii, no. 7, July 1921, pp. 193-198, 1 plate. 



The larvae and pupae of the rhinoceros beetle, Xylorydes satyrus, 

 ¥., are described from individuals that have recently been reared, 

 and notes of various authors on the larval habits are collated. 



Eyre (J. R.). Rearing Anthomyiid Root Maggots on Artificial Media 



(Dipt.). — Ent. News, Philadelphia, Pa., xxxii, no. 7, July 1921, 

 pp. 215-216. 



Experiments with Hylemyia antiqua, Meig. (onion maggot) and 

 H. hrassicae, Bch. (cabbage maggot) have demonstrated that these 

 species can be successfully reared on agar jelly containing a high 

 per cent, extract of the larval food-plant. The method of rearing is 

 described. Owing to the transparency of the agar, the development 

 of each instar can be observed. 



Severin (H. C). The Webspinning Sawfly of Plums and Sandcherries. 



— South Dakota Agric. Expt. Sta., Brookings, Bull. 190, Sep- 

 tember 1920, pp. 222-251, 12 figs. [Received 25th July 1921.] 



The information contained in this bulletin on Neitrotoma incon- 

 spicua has been previously noticed [R.A.E., A, ix, 236]. 



Entomology : Work and Progress of the Agricultural Experiment 

 Station for the Year ended December 31st 1920. — Idaho Univ. 

 Agric. Expt. Sta., Moscow, Bull. 122, January 1921, pp. 33-41, 

 1 fig. [Received 25th July 1921.] 



Close grazing as late as the first week in July or cutting back between 

 the 1st and 15th of that month will destroy from 80 to 95 per cent, 

 of the clover aphis [Anuraphis hakeri] without materially reducing 

 the number of natural enemies. Tylenchus dipsaci, Kiihn., caused 

 serious injury to clover in certain districts. Heavy infestations of 

 the alfalfa weevil [Hypera variabilis] are recorded, against which 

 dusting is likely to prove more satisfactory than spraying. 



