256 EXPERIMENT STATION EECOED. 



attacked quite severely, while the navel orange is only slightly attacked. It 

 is recommended that a regulation be passed prohibiting the shipping of Oahu 

 grown fruit to the other islands. 



Annual report on the entomological work for the year 1909, C. W. Jem- 

 METT (Ann. Rpt. Ent. Wo7-lc [Soitth. Nigeria], 1909, pp. 20). — A brief account is 

 given of the work of the year to which are appended two reports, namely. On 

 Insects Observed on the Cotton Plant During the Year, 1909 (pp. 9-15), and On 

 Insects Observed on Cocoa Trees During the Year, 1909 (pp. 16-20). 



Insects which kill forest trees: Character and extent of their depredations 

 and methods of control, A. D. Hopkins (U. S. Dept. Agr., Bur. Ent. Circ. 125, 

 pp. 9).— This circular consists of revised extracts from Bulletin 58, Part 5, of 

 the Bureau of Entomology, previously noted (E. S. R., 22, p. 260). 



Insect injuries to the wood of living trees, A. D. Hopkins {TJ. S. Dept. 

 Agr., Bur. Ent. Circ. 126, pp. 4)- — This also consists of revised extracts from 

 Bulletin 58, Part 5, of the Bureau of Entomology (E. S. R., 22, p. 260). 



Insect injuries to the wood of dying and dead trees, A. D. Hopkins (U. 8. 

 Dept. Agr., Bur. Ent. Circ. 127, pp. 3). — This also consists of revised extracts 

 from Bulletin 58, Part 5, of the Bureau of Entomology (E. S. R., 22. p. 260). 



Insect injuries to forest products, A. D. Hopkins (U. 8. Dept. Agr., Bur. 

 Ent. Circ. 128, pp. 9). — This also consists of revised extracts from Bulletin 58, 

 Part 5, of the Bureau of Entomology (E. S. R., 20, p. 260). 



Insects in their relation to the reduction of future supplies of timber, 

 and general principles of control, A. D. Hopkins ( U. 8. Dept. Agr., Bur. Ent. 

 Circ. 129, pp. 10). — This also consists of revised extracts from Bulletin 58, 

 Part 5, of the Bureau of Entomology (E. S. R., 22, p. 260). 



Papers on deciduous fruit insects and insecticides. Life history of the 

 codling moth in northwestern Pennsylvania, A. G. Hammar {U. 8. Dept. 

 Agr., Bur. Ent. Bui. 80, pt. 6, pp. 71-111, pi. 1, figs. 15). — The account here pre- 

 sented is based upon investigations conducted at North East, Pa., from 1907 to 

 1909. Seasonal history studies of these years, in which the separate stages of 

 the 2 generations are considered in detail, are followed by a comparison of life 

 history studies for the .3 seasons in which certain fluctuations were found in 

 regard to the time of emergence of moths and the time of maturity of larvae of 

 the 2 broods, and also a comparison of relative occurrence of larvae of the 2 

 broods for the 3 seasons. Many tables and charts accompany the account, the 

 maximum and minimum daily temperatures for the 3 years being shown in 

 the form of charts. Brief mention is made of the several insect enemies 

 observed, which include Tenehrioides corticalis, found to devour codling moth 

 larvae, 4 species of ants attacking the larvae, a hymenopterous parasite (Ascogas- 

 ter carpocaps(E) bred commonly from band material of the 2 broods, and others. 



The following summary of the work is given : 



" In northwestern Pennsylvania the codling moth produces in the course of a 

 year one full generation and a partial second generation. 



" The life-cycle of the insect may be briefly summarized as follows : In the 

 spring the overwintering larva pupates in early June, and 3 weeks later 

 the moth emerges. The emergence extends over a period of about 1 month, 

 beginning about the middle of June. Oviposition generally takes place 3 or 4 

 days after the emergence of the moth, and the egg hatches in 1 week. Eggs 

 showing a red ring are about 3 days old, while those with a black spot in the 

 center will mostly hatch in 1 or 2 days. Shortly after hatching the young 

 larva enters the fruit and feeds about 26 days. On reaching maturity the larva 

 seeks a hiding place beneath the rough bark of the trunk of the tree and con- 

 structs a cocoon within which pupation takes place about 1 week after the 



