177 



Brittain (W. H.). The Tree Hoppers of Nova Scotia.— Proc. Entom. 

 Soc.Nova Scotia for 1917, Truro, no. 3, January 1918, pp. 7-14, 6 

 plates. [Received 11th February 1919.] 



This popular article is intended to be one of a series of similar papers 

 on the insects of Nova Scotia. Short notes on the classification and 

 food-habits of the insects are given, with a life-history of one species, 

 Publilia concava, Say, which does not appear to have been previously 

 recorded. 



Brittain (W. H.). Notes on the Yellow Leaf Hopper of Birch. 



{Oncopsis sobrius. Walk.). — Proc. Entom. Snc. Nova Scotia for 

 1917, Truro, no. 3, January 1918, pp. 18-20, 1 plate. [Received 

 nth February 1919.] 



Oncopsis sobrius, Wlk. (yellow leaf-hopper) is frequently foimd on 

 biiches in the vicinity of Truro and elsewhere in Nova Scotia, though 

 less abundantly than the related species, 0. fitchi, Van D. There is 

 apparently only one generation in a year. A table shows the hfe- 

 history of individuals reared in the laboratory, and a description of 

 the various stages is given. 



Brittain (W. H.). Miscellaneous Notes on the Apple Maggot {Rhagoletis 

 pomonella, Walsh). — Proc. Entom. Soc. Nova Scotia for 1917, 

 Truro, no. 3, January 1918, pp. 37-41. [Received lUh February 

 1919.] 



A table gives the record of emergence of adults of Rhagoletis pomonella 

 in 1917 from out-door cages. It was observed that 30 per cent, of 

 the entire emergence took place in the second year, a habit that would 

 enable the insect to hve through a total failure of its food-plants for 

 one year. Oviposition may take place in as short a time as four days after 

 emergence. The percentage of fertility of the eggs varies greatly 

 with the variety of the host, and the season. The tests of the previous 

 year regarding the effect of chemicals upon the pupae [see this Review, 

 Ser. A, iv, p. 370, and v, p. 269] were completed, and confirmed the 

 opinion that this method of dealing with the pest is unsatisfactory. 



Payne (H. G.). The Zebra Caterpillar (Ceramim ^icto, Harris). The 

 Fall Canker Worm {Alsophila pometaria, Harris). The Rusty 

 Tussock Moth {Notolophus antiqua, L.). The White Marked Tussock 

 Moth {Hemerocampa leucostigma, A. & S.) — Proc. Entom. Soc. 

 Nova Scotia for 1917, Truro, no, 3, January 1918, pp. 44-67, 

 4 plates. [Received 11th February 1919.] 



An account is given of each of these well-known pests, with notes 

 on the Ufe-hi stories accompanied by tables. " Ceramica picta (zebra 

 caterpillar) is a general feeder and attacks many vegetables and 

 cultivated flowers. The chief damage is done by the second generation 

 late in the season. Dipterous and Hymenopterous parasites were 

 reared during this investigation, but are as yet undetermined. 



Alsophila pomef aria (fall canker-worm) has severely infested orchards 

 in the Annapohs Valley during the past three years In addition to 

 orchards, almost any deciduous tree may be attacked ; large areas 



