654 EXPERIMENT STATION RECORD 



Oluiuliognathufi marginatus, is said to follow tlie worms into their burrows and 

 during some seasons devour large numbers of them. The common lady beetle 

 MeyiUa niaculata of which there are at least three broods during the season 

 in Kentucky is said to be a constant frequenter of corn where it feeds upon 

 tlie egg. Records of the reai-ing of three broods in the insectary are detailed in 

 tabular form. Ilippodamiu convcrgcnn frequents corn silli and feeds uix)n the 

 eggs of the bollworm, at Hickman it having been found on corn in about equal 

 numbers with M. maculata. A true bug, Coriscus fcrus, of which two broods 

 were reared in the insectary, is said to have proved to be a useful check in the 

 increase of the pest. The insidious flower bug (Triphlcps insidiosus) , while 

 appearing to feed to some extent on plant juices, is common among corn silk 

 and is very useful because of its destruction of the egg. It was found to ovi- 

 posit in the tender corn silk and rearing studies reported show four molts to 

 occur before it reaches maturity. The average time passed in development of 

 the eggs to maturity was 15 days, 3J hours. The lace-wing fly Chrgsopa oculata, 

 a common enemy, was reared through three broods in 1912, the number of eggs 

 deposited by a single individual varying from 27 to 56. 



The illustrations include colored plates which show the color variations of 

 the adult and larva. A monograph of this pest by Quaintance and Brues of this 

 Department has been previously noted (E. S. R., 17, p. IGO). 



[Codling moth investig'ations], F. Gakcia (New Mexico Sta. Rpt. 1914, PP- 

 67-77, figs. 3). — Experiments conducted to determine the attractivity of electric 

 lights of various colors placed in the orchard brought out the fact that a large 

 proportion of the first brood of moths, developing from wintered-over larvae, 

 are either males or infertile females. Charts are given which show the time of 

 emergence of the maximum number of wintered-over codling moths, irregularity 

 of emergence of the larvae of the different broods, and the time at which the 

 larger number of larvte occurred. The results of spraying work, based upon a- 

 life history study, as shown in tabular form, is thought to have been very satis- 

 factory. 



The European pine shoot moth; a serious menace to pine timber in 

 America, A. BuscK {U. 8. Dept. Agr. Bui. 110 {1915), pp. 11, pis. 6).— This is 

 a more detailed account of Evctria huoliana than that previously noted (E. S. 

 R., 32, p. 251). 



The author deals with the history of the species in Europe, food plants, intro- 

 duction and distribution in America, life history, character of injury, descrip- 

 tion of the several stages, allied American species, natural enemies, and method 

 of control. Survey investigations made during the summer of 1014 have estab- 

 lished the fact that the species has been repeatedly introduced on European 

 nursery stock and that it has become established in nurseries and parks in sev- 

 eral localities scattered over nine States, namely, Massachusetts, Connecticut. 

 Rhode Island, New York, New Jersey, Pennsylvania, West Virginia, Ohio, and 

 Illinois. It is stated that in none of these localities, except on Long Island, has 

 the species existed for more than the last two years, and in most of them it has 

 become established only within the last year. As yet the jiest has been found 

 only in nurseries and private parks supplied by these infested nurseries. In no 

 case has it yet been found on forest trees in America. It is confined to pine 

 and does not attack other coniferous trees. It is pointed out that the species 

 attacks mainly young trees between 6 and 15 years of age, but it is often ex- 

 cessively destructive to younger plantings and seedlings and injurious also to 

 older trees, though trees of 30 years or older are rarely seriously affected. 



The full life history of the species in America has not been ascertained. 

 While in the main it is the same as in Europe, a very distinct difference has 



