1020] ECONOMIC ZOOLOr.Y ENTOMOLOGY. * 359 



|)liiiiUMl froiii Api'il to Miiy 1 : Coiiimcrcial While ;il»(iut May 1 ; and Kansas Sini- 

 (lowcr and Hildretli lioni May 1 lo May 1;"). ('onsidcrinj; tlii' ri'sulls fur llie 

 four varieties, May 1, iinder favorable fonditions, is the optimum time to phmt 

 corn to escape the corn earworm. 



" (Considerable variation lias been noted in the number of eggs deposited on 

 the four varieties of corn. In 43.7 per cent of the plats grown in the six years, 

 lioone County White has had the lowest number of eggs. Kansas Sunflower has 

 had the fewi'st eggs in 2S.3 per cent of the plats, Commercial White in I.I.C per 

 cent, and Iliidreth in 1L'..~) per cent. 



"A siniihir variation was noted in the location of the egg.s on the dift'erent 

 varieties. There are a number of factors to be considered with relation to ovi- 

 position on varieties of corn, the principal ones being the time and period of 

 silking, the time of maturing, and certain morphological characters of the 

 plant." 



Tfie broods of the tobacco worms, II. GARMAisrand II. PI. Jewett {Krniuchy 

 ^tii. Bill. 225 (JH20). pp. 3-24, J'tix- ^/).— This bulletin deals with two species of 

 Si>hingitl;e (1) tlie tobacco worm whidi is abimdant in the North, and (2) the 

 tomato worm most abundant in the South. The tomato worm is nnich more 

 common during the majority of seasons in Kentucky, but is generally associated 

 witk small ninnbers of the tobacco worm in the fields, the two appearing locally 

 and occasionally in nearly equal numbers. 



The study of the two .species, here reported, shows them to pass througli tlieir 

 changes with the same number of annual broods, with practically the same 

 time limit, in Kentucky tobacco tields. "Two detinitely limited broods appear 

 each year with a possible third very late brood, the latter maturing on the 

 leaves of the tobacco stubble during long seasons, as indicated by numerous 

 larv.-e and occasional emerging adults observed long after crops were harvested. 

 The first amuial brood appears as young w(U'ms soon after the plants are trans- 

 planted from the beds and often in the beds after the cloth coverings are re- 

 moved. A second brood of both species appears in eai'ly August, at which time 

 there is a confusing condition resulting from an overlapping of first and sec- 

 ond broods. The first brood requires about 4r) days to complete its growth from 

 egg to adult. The second brood re<|uires about 23 days to comph^te its growth 

 from egg to pupa, and passes the winter in the i)Ui)a stage in the soil of tobacco 

 tields, emerging as adults the following .Tune, with a total life period of about 

 32G (lays. Attention is directed to important fungus and insect parasites that 

 cause wide fluctuations in the number of worms from season to season, some- 

 times causing whiit almost amounts to a suppression of the insects. An espe- 

 cially important i>arasite observed is a singular fungus (Cordyceps) attacking 

 the pupa, of which an illustration is presented." 



Ten years of the oriental motb, II. T. Fkuxaed (Jour. Boon. Ent., 13 {1920), 

 No. 2, pp. 210-212). — Scouting during the winter of 1010-17 showed that the 

 territory in Massachusetts occupied by the oriental moth, though still very 

 Irregular in outline, was nearly four miles in length, and nearly three miles 

 In width at its widest point, with an average width of nearly two miles. About 

 6 per cent of a collection of oriental niwth cocoons made in the infested area in 

 March, 1919, had been parasitized by a pupal parasite, Chri/si.'i ahaiu/hairn.ti-'i 

 Walk., imported in 1017 and lOIS from China. 



A pr<'liniinary rci)ort on tlie use of sodium cyanid for the control of tlie 

 poach tree borer (Sanninoidea e.vitiosa Say) , A. rKTER.soN (Jour. Ecnn. Ent., 

 IS {t!i20), Xo. 2, pp. 201-208, fig. 1). — This paper is based upon stu<li(>s made 

 at the New Jersey Stations during the past two season.s. Exi)eriments with 

 sodium cyanid were .started by Blake and Connors in 191 G, who found that 



