464 EXPERIMENT STATION RECORD. 



plant of the larvae of this insect. They occur on it, however, only in 

 sunny places. Larvae taken in April produced the mature moth from 

 about May 20 to the middle of June. On May 29 a pair were found copu- 

 lating and so remained until the next day. On that and the follow- 

 ing days the female laid its eggs rather high up on the stalk of the food 

 plant, both isolated and in small groups, of which the largest numbered 

 20 eggs. Some four days after copulation the male died. The egg is 

 of a flattened oval shape and measures in its chief dimensions 0.35 by 

 0.3 mm. On its flattened side it has a small impression. The upper end 

 has a small furrow and the opposite end is rounded. Under the lens 

 its surface appears covered with deep impressions, the edges of which 

 have a golden glitter in the sunshine. It is described as a whole as 

 having a somewhat biscuit form. The yellow larvae gnaw their way 

 out through the upper end of the egg and crawl down along the stalk 

 of the plant to find a place near the root crown in which to bore. A 

 favorable spot is not, however, always found, and it appears probable 

 that, like 8. impiformis, they will occasionally enter the stalk some 

 distance above the ground. By June 14 the larva?, in the author's 

 experiment, had all disappeared. Among the moths collected interme- 

 diate forms were common: S. stelidiformis and 8. 8. icteropus, S . 



A new tobacco pest, G. McCarthy {North Carolina 8ta. Bui. 141, 

 pp. 2, figs. 2). — The moth, Gelechia picipelis, which is found native in 

 North Carolina feeding upon the perennial solonaceous weed, Solarium 

 carolinense, has been found doing considerable damage to tobacco. 

 Although the insect probably inhabited its present range of nearly the 

 entire tobacco growing area of the United States from the time of the 

 discovery of America, it was first noted as attacking tobacco in 189G. 

 Thus far the damage noted is serious only in three townships of one 

 county in North Carolina and in a district in Florida. A popular 

 description of the insect is given and of its life history and mode of 

 attack, which is that of a leaf miner. The only applicable remedy 

 at present seems to be clean cultivation, with frequent stirring of the 

 soil close to the plants to destroy the dormant pupa 1 . By closely 

 watching the leaves the caterpillars may be destroyed with the fingers 

 as soon as the leaf blotches caused by them appear. 



An invasion of Cochylis and of (Enophtira and the means of 

 defense, L. Degrully (Prog. Ayr. et Vit., 14 (1897), No. 2d, pp. 759- 

 761). — Large numbers of Cochylis roserana are noted as having invaded 

 the vineyards of Maiue-et Loire, Gironde, Lot et Garonne, Haute 

 Garonne, Aude, Basses-Pyrrnoes, Card, Yar, Rhone, Saone-et-Loire, 

 etc. The damages are said to have been very considerable. The use of 

 pyrethrum mixtures is being discarded on account of the expense of the 

 pyrethrum powder, essence of terebenthin being substituted for it accord- 

 ing to thefollowingformula: Water, 100 liters; black soap, 3 kg.; essence 

 of terebenthin, 2 liters. In making up this mixture the soap is first 

 dissolved in the water and then the terebenthin added, the mixture being 



