50 



while A. pyri, Boyer, of Koch is A. malifoliae of Fitch. A. ]njri, Koch^ 

 is however an entirely different species, and the name being pre- 

 occupied, has been renamed A. kochi by Schouteden, though Theobald 

 has treated A. malifoliae, Fitch, as a synonym of A. kochi, Schout. [see 

 this Revieiv, Ser. A., iv, pp. 396]. Though A. sorbi, Kalt., is the name 

 now most commonly applied to the American rosy apple aphis, the 

 description does not apply in every particular to the authors' insect, 

 and these differences, and the examination of European examples, 

 lead them to believe that they are dealing a with distinct species. 

 Myzus plant agitiis, Pass., common on broad-leaved plantain in the- 

 U.S.A., must also be distinguished from A. malifoliae occurring on 

 plants of the same genus. 



A. malifoliae is abundant in some of the northern States and also 

 occurs in Quebec, Ontario and British Colombia. A description of the 

 various stages is given. The eggs are laid mostly on small twigs, 

 under buds, or in crevices in the bark, and hatching begins early in 

 April and continues for about a week. The first stem-mothers begin 

 to reproduce about 25th April. The first generation is wingless, while 

 in each succeeding generation the percentage of winged insects increases, 

 until all are winged. Migration to plantains begins about 20th May, 

 and most of the insects have left the apple by about 20th June. From 

 4 to 14 generations of the summer form occur, these being practically 

 all wingless. The first autumn migrants become adult about the 

 second week in September and remain on the trees after 1st November. 

 Production of oviparous females begins about mid-September, and is at 

 its height about mid-October. Males begin to appear early in October, 

 at the time the oviparous females begin to become adult, and are most 

 numerous at the end of October and early in November. Oviposition 

 begins in mid- October and continues till the oviparous females are all 

 dead. 



This Aphid causes the leaves to curl, and in very young trees the 

 growing tips of the branches are also attacked, with the result that 

 they become twisted and permanently deformed. The fruit, when 

 attacked, is of small size and irregular shape. 



A bibliography of 12 works is given. 



SiLVESTRi (F.). Sulle Specie di Trypaneidae (Diptera) del Genere Carpo- 

 myia dannose ai Frutti di Zizyphus. [Note on the Trypetidae. 

 of the Genus Carp)0^nyia which are injurious to Fruits of Z^2;?/- 

 ;p^ws.]— Separate, dated 18th October 1916, from Boll. Lab. Zool. 

 Gen. Agrar. R. Scuola Sup. Agric., Portici, xi, pp. 170-182, 9 figs. 



The genus Carpomyia, Eond., is at present represented by two species, 

 the larvae of both of which live in the fruit of some species of Zizyphus, 

 This paper describes for the first time the larvae of both species, with 

 figures of the adults. 0. ves^iviana, Costa, has been reported from 

 south Italy, Dalmatia and India and probably occurs in all those 

 regions of southern Europe and Asia where its food-plants grow. 

 The larvae of C. vesuviana infest Z. saliva in Italy, and Z. jujuba in 

 India. Near Portici the adults appear from the second half of June 

 till a httle after mid-July. The eggs are laid within a few days of 

 emergence. After feeding, the larva migrates to the ground, where it 

 pupates and passes the wanter. There is thus one generation a year in 



