160 EXMlRlMENT STATION RECORD. [Vol. 4^ 



search revealed its presence on the numerous wild roses gi'owing on tlie bank 

 of the Penobscot near the ragwort. By transfer from wild rose to ragwort, it 

 was shown to be capable of living upon ragwort and its progeny of maturing 

 upon the secondary host plant. It is thought that M. pseudorosw may prove to 

 be a synonym of ro.saif(jrniis Das which occurs in India, where it is known 

 as the " Punjab rose aphid." 



Descriptions are given of the alate and apterous viviparous females. A key 

 for the separation of this new species from other members of the genus oc- 

 curring in eastern United States is included. 



The paper concludes with a description of eleven new species of Macrosiphum 

 of which but little is as yet known, all of which were collected in Maine, 

 namely : M. carpinicolens from leaves of blue beech ; M. ptericolens from fronds 

 of bracken fern (Pteris aquilina) and from lady fern {Athyrium filix-' 

 foemina) ; J/, dicrrillw from wild bush honeysuckle (DierviUa, lonicera) ; 

 M. inipatiensicolens from stem of terminal shoots of Impaticns biflora; M. 

 amelanchiericolens from Amelanchier spicata; M. onayrw from evening prim- 

 rose {Oenothera biennis) ; j\I. pseudocoryli from ironwood {Ostrya virginiana) 

 and from hazel bush {Corylus rostrata) ; M. pseudodirhodum from terminal 

 shoots, buds, and tender leaves of gi-eenhouse roses and wild rose ; M. gravi- 

 cornis from Solidago ; M. eupcitoricolens from the common species on Joe-Pye 

 weed (Eupatorkim purpureum) ; and M. Uinceolatum from goldenrod (Solidago 

 lanceolata) . 



This bulletin also includes part 6 (pp. 21&-248) of the author's Food Plant 

 Catalogue of the Aphididie of the World, in C(Mitinuati(in of the parts previously 

 noted (E. S. K., 39, p. 657.) 



Determination of the sox of the offspring from a single i>air of Pediculus 

 vestimenti, K. Foot {Biol. Bui. Mar. Biol. Lab. Woods Hole, S7 {1919), Xo. 6, 

 pp. 385-387). — In the determination of the sex the author has dissected the 

 nyniphs without waiting for them to mature. 



Bagvvorms destructive in Missouri, L. Haseman {Missouri Sta. Circ. 92 

 {1920), pp. Jf, figs. Jf). — This is a brief popular account of the bagworm, which 

 occurs periodically in gi'eat abundance in Missouri. 



On the effects produced by the attacks of the pink bollworm on the 

 yield of cotton seed and lint in Egypt, L. H. Gough {Bui. Ent. Research, 9 

 {1919), No. 4, pp. 279^24, id- 1, flg'i. 6). — A summary is first given of the estab- 

 lished facts concerning the life history of {Gelcchia) Fcctinophora gossypiella. 

 This is followed by a discussion of the rate of increase of damage in P^gypt since 

 1911, and of investigations of the nature and amount of damage done under the 

 headings of weight of sound seeds and germination of sound seeds from attacked 

 bolls ; number of seeds, sound or attacked, developed in attacked bolls ; effect of 

 Pectinophora attack on the amount of lint produced, and a calculation of the 

 damage done. A large part of the data are presented in tabular form. Notes 

 on observations made in 1917-18 relate to the rate of increase of Pectinophora 

 in 1917, observations on resting larvae, Pectinophora in seed stores, and a de- 

 struction of the larvae in seed as carried out on a commercial scale in ginneries. 

 It appears that iji some manner the pink bollworm causes some of the sound 

 seeds developing in attacked bolls to lose weight, and there appears to be no 

 doubt that this indirectly alfects the germination of sound seeds. Since any 

 factor that can affect a developing seed can also affect the quantity of lint 

 produced by that seed, it appears that Pectinophora attack must affect the 

 amount of lint produced, (1) by reducing the number of seeds matured per 

 boll, (2) by reducing the average weight of the sound seeds - produced in 

 attacked bolls, and (3) by disturbing the development of immature attacked 

 seeds. 



