121 



calyx of the bud, and hatch out in 2 or 3 days, the larvae immediately 

 boring into the tissues, which they leave after 8 or 9 days to pupate in 

 the soil, whence the moth emerges in about a week. Owing to the 

 part attacked being the flower-buds or young pods, the damage done 

 by this pest is considerable. No larval or pupal parasites have been 

 reared, though Trichogramma minutum is known to parasitise the eggs. 

 Other food-plants are Canavalia spp. and a wild plant, Vigna luteola. 



The following identifications of insects reared in 1915-16 have been 

 made : — Lepidoptera : Nacoleia indicata, F. (lima-bean worm), on 

 Phaseolus spp. ; Pachyzancla bipunctalis, F., on Amarantous, spp. ; 

 and Tischeria sp., a leaf-miner, in Synedrella nodiflora. Diptera : 

 Agromyza inaequalis. Mall, (lima-bean blotch-miner), on lima bean ; 

 A. parvicornis, Lw. (corn-leaf blotch-miner), on maize ; and a new 

 species of Agromyza mining in Commelma virginica. 



Parasites reared in 1915-16 have been determined as follows : — The 

 Tachinids, Eucelatoria australis, Towns., and Sarcodexia sternodontis, 

 To-^Tis., larval parasites of Calpodes ethUus ; the Chalcids, Chryso- 

 charodes major iam, Gir., a pupal parasite of a leaf- miner on cassia 

 {CouDnelina virginica) ; Achrysocharella aetii, Gir., a pupal parasite 

 of a leaf- miner on Synedrella nodifiora ; Polycystus clypeatus, Gir., a 

 pupal parasite of Agromyza parvicornis, Lw. ; Pseudomphale eudami, 

 Gir., and Grotiusomyia eudami, Gir., larval parasites of Eiidamus 

 proteus ; Habrolepoidea suhmetallica. How., an egg- parasite of Nezara 

 viridida ; Tetrastichusfasciatus, Ashm., a larval parasite of Cecidomyia 

 manihot. Felt ; and Neocatolaccus syrphidis, Gir., a pupal parasite 

 of a Syrphid fly that attacks the corn aphis \_Aphis niaidis]. 



Work connected with Insect and Fungus Pests and their Control. — 



Rept. Agric. Dept. St. Vincent for 1916-17; Barbados, 1917, 

 pp. 11-15. [Received 9th January 1918.] 



The subject matter of this report has already been noticed from 

 another source [see this Review, Ser. A, v, p. 580]. 



Ross (W. A.). The Black Cherry Aphis. — Canadian Horticulturist, 

 Toronto, xl, no. 12, December 1917, pp. 307-309. 



An outbreak of cherry aphis [Myzus cerasi] was reported from the 

 Niagara district during the smnmer of 1915, the fruit being so badly 

 damaged that most of it was left on the trees. The attack of this pest 

 causes infested leaves to become tightly curled, and to turn brown and 

 die, while the stunted fruit is covered ^vith honey-dew in which a black 

 fungus thrives. 



The minute, oval, black eggs are deposited round the buds and on 

 the rough bark of t^^^gs and branches in the autunm. They hatch 

 early in spring, and the nymphs first attack the leaf-buds and later on 

 the young leaves and flower-buds. In about a month they begin to 

 produce brood after brood of -wingless and winged females until the 

 autumn, the ringed forms from mid- June bo mid- August migrating 

 to wild pepper-grass, where they establish summer colonies of wingless 

 individuals [see this Review, Ser. A, vi, p. 103]. In early autumn these 

 produce migrant forms that return to the cherry and produce egg-laying 

 females, while at the same time the wingless forms on the cherry produce 



fC452) o 



