370 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 2 



emergence of moth to ovipositiou, the second generation requires an average of 

 48 days (35 to 65 days). A life history chart is given showing the develop- 

 ment of tln-ee full generations and part of a fourth, this heing based on con- 

 tinuous rearings throughout the season, but the discussion of the life history 

 might well have been amplified. Mr. Reed concludes, however, that probably 

 there are usually only three generations and sometimes only two and a partial 

 third. Some larvie of each brood fail to pupate and hibernate over winter. 



Concerning spraying Mr. Reed states that on the proper time of spraying 

 for the first brood hangs 78% of successful control for the season, although the 

 second brood does more actual damage than the first brood. 



Spraying experiments were carried on at Tallapoosa and Pomona. Un- 

 fortunately no records of dropped fruit were made and at Pomona only 500 

 fruit were counted from a single tree in each plot. The arrangement of the 

 plots was also unsatisfactory, consisting of straight rows, side by side, so 

 that there must have been considerable influence of one plot on another. Nor 

 was the time of spraying well arranged to show the exact value of the early 

 sprays after the first or the best time for their application. The first was 

 given when the petals fell (April 6) ; second, before calyx closed (April 13) ; 

 third, 10 days later (April 23) ; fourth, 14 days later (April 27) ; and fifth, 

 when second brood eggs hatched (June 12) ; and two weeks later (June 26). 

 Therefore the results of the spraying experiments can hardly be regarded as 

 very conclusive, but studied in a broad way indicate the following results: 



But little difference was indicated in the value of the first three sprayings, 

 or whether applied just as the petals fell or a week later just before the calyx 

 closed. Late sprayings for the second brood showed only 2 to 5% benefit, and 

 when added to the early sprays increased their benefit by about the same 

 amount. The practical value of spraying was well demonstrated, though the 

 per cent, of perfect picked fruit was not as high as should be secured with 

 thorough work. 



E. D. Sanderson. 



Striped Cucumber Beetle, by T. J. Headlee, 19th and 20th Re- 

 ports of the N. H. College of Agric. & Mechanic Arts, p. 419-513, 1908. 



This is a most excellent general economic account of the striped cucumber 

 beetle, one of the most important insects with which the American farmer 

 has to deal. The writings of earlier authors are freely cited and comparisons 

 are made, some of which are extremely interesting, e. g., the periods the writer 

 determined by rearing in the District of Columbia in a high temperature in 

 comparison with those in New Hampshire at the naturally considerably lower 

 temperature. In the former It was found that the pupal period could be 

 passed in a minimum of seven days in a temperature of from 75° to 85° F., 

 while in New Hampshire 13 days are required in a temperature of about 66° 

 F. In regard to the total period of the life cycle, Garman, working in Ken- 

 tucky, ascertained that this period from the hatching of the egg to the trans- 

 formation to the adult averaged from 26 to 33 days, while in New Hampshire 

 the life cycle was passed in an average of 54 days, at a mean temperature of 

 69° F. In New Hampshire it has been ascertained that the species is single 

 brooded, but the writer still claims, until it can be otherwise proved, that 

 there are at least two generations in the District of Columbia and perhaps 

 three southwai'd, this conclusion being based upon analogy. Some interesting 



