213 



Diabivtica vitiata (striped cucumber beetle) may be controlled by 

 a dust containing 1 part of calcium arsenate to 20 parts of gypsum. 



The most important pests of clover recorded during the year were 

 Hypera {Phytonomus) punctata (clover leaf weevil), H. (P.) nigrirostris 

 (clover bud worm), and Hylastinns obscurus (clover root borer). 



RoHVVER (S. A.) & MiDDLETON (W.). U.S. Bur. Ent. North American 

 Sawflies of the Subfamily Cladiinae, with Notes on Habits and 

 Descriptions of Larvae. — Proc. U.S. Nat.Mus., Washington, D.C., 

 Ix, art. 1, no. 2396, 1922, pp. 1-46, 7 plates. 



A revision of the adults and descriptive notes on the known larvae 

 are given, as well as observations on the habits of certain species of 

 sawflies of the subfamily Cladiinae. Keys are given to the genera 

 and species, and nine new species are described. 



Hirst (S.). On Some New Parasitic Mites. — Proc. Zool. Soc, London. 

 1921, pt. 4, January 1922, pp. 769-802. 28 figs. 



The new mites described include Parateiranychus trinitatis, sp. n., 

 on grape-vine from Trinidad. 



Hendkickson (A. H.). Prmie Growing in CaUfornia. — California 

 Agric. Expt. Sta., Berkeley, Bull. 328, June 1921, 38 pp., 12 figs. 

 [Received 24th February 1922.] 



The prune pests dealt with include the mealy plum aphis [Hyalopterus 

 arundinis], the eggs of which are laid in the autumn on the limbs of 

 the trees and hatch the next spring; the peach-tree borer [Aegeria 

 exitiosd], the eggs of which are laid from June to September, the young 

 borers entering through the bark ; and the larvae of the flat-headed 

 apple-tree borer [Chrysobothris femorata], which feed in the sapwood 

 at or near the crown. 



Canker worms, the red-humped caterpillar [Schizura concinna] and 

 leaf-rollers all feed on the foliage. Mites are common, and cause 

 3^ellowing and premature dropping of the leaves. Very fine dry sulphur 

 at the rate of one-sixth to one-third of a pound to a tree, or diluted 

 with about 50 per cent, of air-slaked or hydrated Hme, is recommended 

 for use immediately mites, such as Tetranychus, appear. In severe 

 infestations, dusting should be continued at intervals of from 10-14 

 days. In young orchards or in windy spots the use of dry sulphur 

 has not always been successful. Where dusting cannot be carried out 

 sulphur paste or lime-sulphur (not stronger than 1-75 gals, water) 

 may be used, though this sometimes injures the foliage, particularly 

 if a period of high temperature follows the spraying. 



The brown apricot scale [Eulecanium armenaicum] and Italian pear 

 scale [Epidiaspis piricola] are of special importance, and the latter 

 may cause the death of many limbs in badly infested orchards. The 

 former may be controlled by a 5 per cent, distillate emulsion, a miscible 

 oil, or a 12 per cent, crude oil emulsion, the two first being usually 

 preferred on young trees. A 12 or 15 per cent, crude oil emulsion 

 satisfactorily controls Epidiaspis piricola. The use of 1 gal. lime- 

 sulphur to 9 gals, water is not so effective as the oils, but where it is 



