202 



of this moth to conifers, to the chmate of the High Alps, to fruit 

 trees such as wahiut and Mespilns, to forest trees such as chestnut, to 

 willow, poplar, rose, or to low-growing plants such as sainfoin and 

 dandehon ; the modification of the colour of the wings owing to the 

 difference in food and cUmate ; and finally to ascertain whether such 

 adaptations may become estabUshed. 



Some notes on the life-history are given, the results of which are 

 summarised. The adaptation of P. dispar to conifers can only be 

 temporary and when individuals have migrated to resinous plants 

 their progeny will die out after a few generations. For this reason 

 the injury to these trees can never be of primary importance. The 

 low temperature in the High Alps kills most of the mature caterpillars, 

 and the pupal stage is so prolonged that the adults emerge at a season 

 the inclemency of which prevents reproduction. Adaptation to 

 walnut and plane is likewise temporary only. On the contrary, 

 adaptation of a definitive character to rose, Mesjrilus, chestnut 

 {Aesculus), poplar, sainfoin and dandehon is quite possible. Degenera- 

 tion due to food obtained from unsuitable plajits is shown by a lack 

 of pigmentation in the adult moth. 



Oaumont (L.). Sur un Lachnide du Rosier peu etudie appartenant 

 a un Genre nouveau, Maculolaclinus rosae, Cholodk. [Hem. 

 Aphididae.] — Bull. Soc. Entom. France, Paris, no. 2, 28th January 

 1920, pp. 26-31, 4 figs. [Received 11th March 1920.] 



Attention is drawn to the necessity of erecting a new genus Maculo- 

 lachnus, for Lachnus rosae, Choldk. {maculatus, Licht.). The author's 

 observations on this Aphid and the points of difference between it 

 and alhed genera are given. A modification of Del Guercio's key to 

 these Aphids to include this new genus is appended. 



Blanchard (E.). Degats caus6s aux Arbres Fruitiers par la Cheima- 

 tobie dans la Vallee du Rhone. — La Vie Agric. et Rur., Paris, 

 xvi, no. 10, 6th March 1920, p. 169. 



Cheimatobia hrumata is increasing in the Rhone Valley. Cherry 

 orchards are chiefly attacked, and the crop is sometimes considerably 

 reduced. The ordinary method of control is by banding with an 

 adhesive \R.A.E., A, vi, 470]. To supplement this, experiments were 

 made with injections of carbon bisulphide into the ground round 

 isolated trees for a distance of 20 inches, the dose being about 5 cwt. 

 to the acre. 



Considerably fewer females were caught in the sticky bands on 

 the trees that had been thus treated, but they were still attacked, 

 and consequently there is a need for further measures, or a denser 

 series of injections might be tried. 



Del Guercio (G.). Pectinophora gossypiella, a Microlepidopteron 

 injurious to Cotton in Italian Somaliland. — U Agric. Colon., 

 Florence, xii, no. 5, 1918, pp. 298-311. (Abstract in Mthly. Bull. 

 Agric. Intell. & PI. Dis., Rome, x, no. 3, March 1919, pp. 362- 

 363.) [Received 15th March 1920.] 



Pectinophora gossypiella (pink bollworm) has become firmly estab- 

 lished in the cotton-fields of Italian SomaUland, where almost 100 per 



