58 EXPEEIMENT STATION RECOKD. [Vol.38 



nicotin, even when highly diluted, is fatal to and the best insecticide for use 

 in combating capsid bugs which injure apples in England, of which the green 

 bug (Plesiocoris rugicolUs) is the most important. It is pointed out that nicotin 

 may be applied in conjunction with soap, lime-sulphur, or Bordeaux. 



Miscible oil v. fish-oil soap sprays for the control of Florida aleyrodids, E. 

 A. Back and S. S. Ceossman (Jour. Econ. Ent., 10 (1917), No. 5, pp. 45S-458).— 

 The spraying investigations here reported show miscible oil sprays to have a 

 very practical advantage over fish-oil soap sprays. The importance of spray- 

 ing citrus groves while the average number of aleyrodids per leaf is stiU small 

 is emphasized. 



Control work with phylloxera in Teramo from 1901 to 1916, B. Gbassi 

 (Bol. Mm. Agr. e Indus., Com. ed. Lavoro [Rome], Ser. B, 15 (1916), II, No. 

 9-12, pp. 69-135, pis. S, figs. 11). — A detailed report of control work. 



The secondary host of Myzus cerasi, W. A. Ross (Canad. Ent., 49 (1917), 

 No. 12, p. 434). — The author's observations have led to the conclusion that 

 V. cerasi is partially monophagous and partially migi-atory. 



"Apterous forms reside throughout the season on the primary host (cherry), 

 and in addition alatse produced during the summer migrate to and establish 

 colonies on a secondary host. In Ontario, according to our observations, the 

 favorite alternate host is wild peppergrass, Lepidium apetalum. We have made 

 several collections of M. cerasi from this weed and in migratory tests we have 

 repeatedly been successful in transferring the louse from the cherry to the 

 wild peppergrass. No doubt other crucifers serve as summer hosts. In our 

 insectary experiments we have succeeded in establishing colonies of M. cerasi 

 on Capsella hursa^pastoris, Brassica arvensis, and Erysimum cheiranthoides, 

 but so far these results have not been verified in the field." 



The gipsy moth and the brown-tail moth and their control, A. F. BtnaoEiSS 

 (TJ. S. Dept. Agr., Farmers' Bui. 845 (1917), pp. 28, figs. 14).— A popular sum- 

 mary of information dealing with the present status of these pests and control 

 measures. 



The velvet bean caterpillar, J. G, Hutson (Agr. News [Barbadosi, 18 

 (1917), No. 386, p. 42). — This noctuid (Anticarsia gemmatUis), an account of 

 which by Watson has been previously noted (E. S. R., 36, p. 459), is said to 

 be the commonest of the leaf-eating caterpillars attacking several leguminous 

 plants used generally throughout the West Indies as cover crops. 



The coconut-tree caterpillar (Brassolis isthmia) of Panama, L. H. Dunn 

 (Proc. Med. Assoc. Isthmian Canal Zone, 9 (1916), pt. 1, pp. 32-48, pis. 5; Jour. 

 Econ. Ent., 10 (1917), No. 5, pp. 473-488, pis. 2). — This lepidopteran is said to 

 be the most destructive insect enemy of the coconut tree (Cocos nucifera) in 

 Panama. The caterpillars form long bag-shaped nests of the leaflets by fasten- 

 ing the ends together and spinning a silken lining on the inner side. They live 

 in great numbers in these nests and feed upon the leaves, the average nest con- 

 taining about 400 caterpillars, though as many as 2,000 may occur, The 

 author's observations of the pests were made of the two annual generations 

 for a period of two years. 



The eggs are deposited during May and June and again the latter part of 

 October, the whole of November, and the early part of December. They are 

 deposited largely in masses of from 150 to 300 eggs on the lower side of the 

 leaves or on the trunk of the coconut trees, but nimabers are also found on 

 buildings or other sheltered places. The incubation of the egg requires a 

 period of from 25 to 30 days, the development of the larvae about 4 months, and 

 the transformation of the pupa from 14 to 17 days. They may be kept under 

 complete control by removing the nests. 



