173 



Herkick (G. W.) &, Matheson (R.). Observations on the Life-History 

 of the Cherry Leaf Beetle. — Jl. Agric. Research, Washington, D.C., 

 V. no. 20, 14th February 1916, pp. 943-950, 2 plates. [Received 

 8th March 1916.] 



During the summer of 1915 severe outbreaks of Galerucella cavicollis, 

 Lee, (cherry leaf -miner) occurred in western and south-western New 

 York. Injury to cherry, peach and plum was reported during June 

 and early July, but ceased entirely during the next month. The 

 sudden appearance in harmful numbers of this insect may be attributed 

 to conditions favourable for increase and hibernation during 1914 and 

 the winter of 1914^15. The suggestion that the beetles migrated from 

 Pennsylvania is probably incorrect, since the native host, Prunus 

 pennsylvanica, is a northern tree, occurring southward only as far as 

 Pennsylvania and, in the mountains, to North Carolina and Tennessee. 



G, cavicollis is widely distributed, having been recorded from Canada, 

 through the New England States southward to Pennsylvania and west 

 to Winconsin, and from North Carolina, Texas, and British Columbia. 

 Adults probably emerge from hibernation during the last half of April 

 or May. Feeding continues actively during May and June, the food 

 consisting of the leaves of pin-cherry, cherry, peach and plum. Early 

 in July the beetles begin to leave cultivated food- plants. At Ithaca, 

 egg-laying takes place from June to August, the eggs being deposited 

 in masses at the base of the pin-cherry. In the latter part of July 

 eggs hatch out in from 14 to 18 days. The larvae climb up the trunks 

 of the host tree and feed on the young foliage ; when they are abundant, 

 the leaves become completely skeletonised and die. Experiments 

 have shown that they are unable to survive on Prunus avium (cultivated 

 sweet cherry), or the native species, P. serotina and P. virginiana. 

 Maturity is reached in two or three weeks, when the larva pupates at or 

 slightly below the surface of the soil. The length of the pupal stage is 

 about 18 days. In New York there is a single brood during the season. 

 Adults emerging in August feed exclusively on the pin-cherry and in 

 the breeding cages began to enter the soil to hibernate about the middle 

 of September. 



In the control of this insect, lead arsenate spray at the rate of 4 or 

 5 lb. paste to 100 gals, water, or nicotine, 3 pts. to 100 gals., have been 

 successfully used. 



Ehehorn (E. M.). Report of the Division of Entomology. — Hawaiian 

 Forester and Agriculturist, Honolulu, xiii, no. 2, February 1916, 

 pp. 43-45. 



During November 1915 the following pests were intercepted : — 

 Phenacaspis eugeniae on ornamental plants ; from HoUand, Prenolepis 

 longicornis on bulbs ; from New Jersey, Diaspis boisduvali and 

 Aspidiotus cyanophylli on orchids ; from Japan, Bruchus chinensis in 

 peas ; from Singapore, Prenolepis sp., Monotnorium sp., Elaterid 

 larvae, a cockroach, Leu^cophaea surinatnensis, and millipedes on wax 

 palms and Mussaenda erythrophyllis, and Pseudococcus sp. on M. erythro- 

 phyllis ; from Japan, Aidacaspis pentagona (peach scale) on peach 

 twigs. A package of chestnuts found in the luggage of an immigrant 

 was found to be infested with a weevil, probably Balaninus sp., and 

 was destroyed. 



