338 



lead arsenate as far as dropping of fruit was concerned, and indicated 

 that calcium arsenate may be substituted for lead arsenate with 

 lime-sulphur, and is much cheaper, but cannot be used alone owing to 

 injury to the foliage. The results with dust sprays were again almost 

 as good as those from liquid sprays, though in some orchards examined 

 the liquid spray produced much cleaner fruit. For the control of 

 Phorbia (Chortophila) brassicae (cabbage root maggot) tarred felt 

 paper discs are likely to be superseded by the use of corrosive sublimate 

 applied to the plants at the strength of 1 part to about 1,200 parts 

 water four days after the plants are set out and again three times 

 at intervals of seven days, sufi&cient fluid being poured around the 

 roots to wet the soil thoroughly as deep as the main root, i.e., from 

 1| to 2 inches. Tobacco dust with sulphur and lime gave promising 

 results, but requires further tests. Fenusa {Metalh(s) betJiunei (black- 

 berry leaf-miner) caused great losses in the blackberry industry. 

 In spite of many experiments no satisfactory remedial measure has 

 yet been discovered. Nursery inspection has greatly improved the 

 position with regard to scale infestation. Though Hemerocampa 

 leucostigma (tussock moth) laid many egg-masses during the previous 

 autumn on trees in cities and orchards, careful inspection and removal 

 of the egg-masses, and the issue of instructions to fruit-growers in the 

 Province have done much to reduce its numbers, while natural enemies 

 have controlled it to such an extent that it is not expected to be a 

 menace next year. 



Gibson (E. H.). The Genera Corythaica, Stal, and Dolichocysta, 

 Champion. (Tingidae : Heteroptera.) — Proc. Biol. Soc. Washington, 

 Washington, B.C., xxxii, no. 17, 20th May 1919, pp. 97-104. 



This paper gives keys to the species of the genera Corythaica and 

 Dolichocysta, including the following : — Corythaica monacha, Stal, 

 which is of considerable economic importance, being a recognised 

 pest of the egg-plant in the West Indies, where it has also been collected 

 from Ricintis comniimis ; C. rostata, sp. n., from Peru, collected from 

 cotton ; and C. carinata, Uhler, on egg-plant from West Indies, 

 Texas and Central America. 



Britton (W. E.). Insects attacking the Potato Crop in Connecticut — 



Connecticut Agric. Expt. Sta., New Haven, Bull. no. 208 (Entom. 

 Ser. no. 26), October 1918, pp. 103-119, 8 plates, 6 figs. [Received 

 5th June 1919] 



The insects dealt with include Epitrix cucumeris (potato flea -beetle) ; 

 Leptinotarsa (Doryphora) decemlimeata, Say (Colorado potato beetle), 

 parasitised by the Tachinids, Doryphorophaga doryphorae, Riley, and 



D. aberrans, Towns. ; Lema trilineata, Oliv. (three-lined beetle) ; the 

 tortoise beetles, Coptocycla bicolor, C. rlavata, F. and C. guttata, Oliv. ; 

 the blister beetles, Epicauta pennsylvanica, DeG. E. marginata, F., 



E. vittata, F., and Macrobasis unicolor, Kirby, all of which can be 

 controlled by lead arsenate sprays ; Papaipema nebris, Guen. (nitela) 

 (stalk borer), cutworms, wireworms and white grubs. Macrosiphnm 

 solanifolii, Ashm. (potato Aphis) and Poecilocapsus lineatus, F. (four- 

 lined leaf-bug) may be controlled with nicotine and soap solution or 

 kerosene emulsion. 



