• 179 



mucli, or as strong spray, as one that is not full of fruit. The state 

 of the solution at the time of use has also been found to have some 

 influence on the amount of injury [see this Review, Ser. A, i, p. 455]. 

 From this evidence it is deduced that the question of lime-sulphur 

 injury is an extremely local problem ; it is hoped that it may be 

 possible in a year or two to determine from meteorological records, 

 from a knowledge of the varieties grown and from the methods followed 

 in any locaUty, whether and what to extent hme-sulphur can safely 

 be used, • 



Brittain (VV. H.) & Saunders (L. G.). Notes on the Biology of 

 Lygus pmtensis, L., in Nova Scotia. — Proc. Entom. Soc. Nova 

 Scotia for 1917, Truro, no. 3, Januarv 1918, pp. 85-91. [Received 

 11th February 1919.] 



During 1917 a study of the life- history and habits of Lyyus praiensis 

 (tarnished plant bug) in Nova Scotia was midertaken. Adults 

 issuing from their winter quarters were found resting upon apple 

 and pear buds in orchards on bright sunny days, but no harm has been 

 observed as a result of their presence at this time. The favour.te 

 food- plant in early spring is sliee]) HOvrel{RiimexacetoseUa) ; most of 

 the hibernated adults oviposited in the flower-stems and leaf-petioles 

 of this plant and perished by the first week in Juty, when those of the 

 first spring generation began to appear. . After three weeks all nymphs 

 had reached the adult stage and sorrel was abandoned. The eggs of 

 this generation are laid in the petioles and midribs of beets and 

 mangels, the incubation period being 9 to 11 days. A description 

 of the stages is given, and Knight's description of the adults of the 

 two forms found in Nova Scotia, namely, Lygus pratensis var. oblineatus, 

 Say, and L. pratensis var. rubidus, Knight, is quoted. The leaves 

 of beets and mangels are seriously mjured by the adults' feeding- 

 pimctures, the outer leaves being wilted and curled, while those at the 

 centre grow^ up very thick and curled. Besides this injury, young 

 flower blossoms of dahlias, peonies, asters and other garden plants 

 are spoiled and distorted. Nymphs of the second brood appear 

 about 6th August ; there are five nymphal instars lasting altogether 

 36 to 39 days. Adults of this generation appear about 28th August, 

 and continue until the frosts begin, when many of them perish. -The 

 insect is considered to be one of the most injurious pests in Nova 

 Scotia, and the questioii of its control is an important problem that 

 awaits solution. 



Bourne (A. I.). Department of Entomology. -Thirtieth Ann. Rept. 

 Massachusetts Agric. Expt. Sta., Boston, Mass., January 1918, 

 pp. 51a-53a. [Received 11th February 1919.] 



Inquiries regarding insect pests were far more nmnerous than in 

 previous years. Unusually severe outbreaks occm-red of several 

 species that normally are not of much economic importance. The 

 rose chafer [Macrodaclylus subspinosus] was present in large numbers 

 and proved a serious pest to garden crops and young fruit trees. The 

 chrysanthemum gall-fly [Diarthronomyia hypogaea] was reported froA 

 several places in the State ; owing to the enormous expense necessary 



