790 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Oyster-shell Scale. By F. Sharman (U.S. A. Exp. Stn., N. 

 Carolina, Bull. 185, June 1913 ; figs.). — This scale (Lepidosaphes 

 ulmi), which is well known here as mussel scale, attacks a large 

 variety of trees and shrubs, and is said to be, next to the San Jose 

 Scale, the most important scale in apple orchards in the district, is 

 described and an account of its life-history is given. The eggs hatch 

 in April and spraying should be commenced then or early in May, to 

 kill the young, when 15 per cent, kerosene emulsion may be used. 

 One gallon of soluble oil to 8-10 gallons of water may be applied 

 during winter, or 25 per cent, kerosene emulsion, or lime sulphur 

 washes. It is recommended to cut out all diseased, dead, or otherwise 

 useless branches before commencing to spray. — F. J. C. 



Oxalis crenata, An Edible Tuberous Species. By Henri 



Blin (Rev. Hort. p. 281, June 16, 1913). — An interesting article on 

 the culture of three varieties forming yellow, white, and red tubers, 

 the first two being preferable to the third. The plant is hardy and 

 produces considerable numbers of small edible tubers in potato-like 

 lines when cultivated in trenches in a similar way. The foliage can 

 be used as a salad, and is capable of yielding a drink which, after 

 fermentation, is very agreeable. Culture is easy and the tubers are 

 procurable from the trade. Forms a pleasant culinary addition to 

 mushrooms. — C. T. D. 



Parasite of Thysanoptera, An Internal. By H. M. Russell 



(U.S.A. Dep. Agr., Bur. Entom., Tech. Ser. 23, pt. ii. ; April 1912 ; 

 11 figs.). — This is an account of the life-history of Thripoctenus russelli, 

 reared by the author from the prepupa of Heliothrips fasciatus Per- 

 gande. — V. G. J . 



Pea Moth. By R. S. MacDougall (Jour. Bd. Agr. vol. xix. 1, 

 pp. 27-29). — The life-history of the Pea Moth (Endopisa nigricana 

 Stph.), the caterpillars of which are the cause of the so-called worm- 

 eaten peas, is given, and preventive measures are suggested. — A. S. 



Peach, « Admiral Dewey ' (Agr. Gaz. N.S.W. vol. xxiv. pt. vi. 

 p. 530 ; 1 col. plate). — The fruit of this Peach is of medium size; 

 firm, yellow subacid flesh ; early. The tree is a strong grower. 



S. E. W. 



Peach 1 Russell* (U.S.A. Dep. Agr., Year Book 1911, p. 429; 

 col. plate). — A seedling which originated in 1890, season mid August. 

 Much grown in Nebraska and Iowa. — E. A. Bd. 



Pear < Ayer ■ (U.S.A. Dep. Agr., Year Book 1911, p. 428; col. 

 plate). — Originated thirty years ago, probably from seed of a ' Seckel ' 

 Pear, which it approaches in flavour. Season early August. — E. A . Bd. 



Pear * Douglas* (U.S.A. Dep. Agr., Year Book 1912, p. 267; 

 col. plate). — A seedling from ' Keiffer,' and which it resembles in many 

 respects, a fact which will be considered no recommendation in this 

 country. — E. A. Bd. 



