243 



as the beetles appear in spring, and repeated, if necessary, in late 

 June and mid-July for the larvae, should prove efficacious. 



The bulletin concludes with a discussion of the validity of the name 

 Haltica, pointing out that Altica Gedffroy (1762) was emended to 

 HaUica by Illiger (1802), the author being of opinion that this is 

 inadmissable. [In the work by Geofiroy referred to the binomial 

 system was not adopted and therefore the generic names there used 

 are invalid. — Ed.] 



Patch (E. M.). The Aphid of Choke Cherry and Grain, A'phis pseudo^ 

 avenae, sp. n. — Maine Agric. Expl. Sta., Orono, Bull, no, 267, 

 November 1917, pp. 293-296, 1 fig. [Received 3rd April 1918.]. 



The new Aphid here described under the name A. jjseudoavenae in 

 mounted material can only with difficulty be separated from the 

 A. avenae of American authors, though in life it is distinguished by 

 the absence of the dark green longitudinal lines characteristic of that 

 species and by the presence of conspicuous areas of wax powder, 

 especially in the spring generations. The spring generations live on 

 choke cherry {Primus virginiana), and examples collected on 25th June 

 showed that both apterous and alate viviparous leniales were present, 

 and migrants were already taking wing. ' These .accepted experiment 

 tally the follo^ving alternative host-plants :— Tihi6t'hy gtass, Kentucky 

 blue grass, sheep fescue, meadow fescue, red top, ba'i'ley and oats^ 



Chtlds (L.). The Life-History and Control of the Rose Leaf-hopper, 

 an Apple Pest. — Oregon Agric. Coll. Expt. Sta., CorcaUis, Bull, 

 no. 148, February 1918, 32 pp., 10 figs., 1 plate. 



The greater part of the subject matter of this bulletin dealing with 

 Empoa rosae as a pest of apple foliage has already been noticed [see 

 this Review, Ser. A, iii, p. 270]. The rose leaf-hopper does not suffer 

 to any great extent from the attack of predaceous and parasitic enemies, 

 the chief being the Chalcid, Anagrus armatus, which has been found 

 to parasitise fully one-third of the eggs. Predaceous insects destroy- 

 ing the nymjDhs are Chrijsopa calif ornica (green lacewing), Hemerobius 

 pacificns (brown lace- wing), Triphleps sp., and the larva of a preda^- 

 ceous tlirips, while the adults are sometimes destroyed by the fly, 

 Scatophaga merdaria, and several species of spiders. 



Control may be effected by the use of the rose as a trap-crop, 92"7 

 per cent, of over-wintering eggs being deposited in rose stems, when 

 a choice of host-plants has been possible. Infestation of apple orchards 

 may be prevented by the pruning and spraying of rose bushes in 

 their vicinity before the insects become winged. The first generation 

 in apple orchards can be controlled by the use of lime-sulphur in the 

 ten-day and thirty-day scab sprays, and after this period, Black Leaf 

 40, 1 in 1200, with 5 lb. soap to 100 U.S. gals, water has been found 

 satisfactorv. On roses, insects in the first three stages may be destroyed 

 by Black Leaf 40, 1 in 2000, with 5 lb. soap to 100 U.S. gals, water, 

 the strength being increased to 1 in 1200 against the later stages. 

 All the sprays must be directed upwards, as the insects are confined 

 to the under-surface of the leaves. 



(C472) b2 



