373 



potato weevil) has been found on an additional food-plant {Calonyotion 

 bona-nox) in Florida. Certain varieties of morning glory, especially 

 Iponioea pes-caprae, are considered to be preferred host-plants of this 

 weevil and might serve as successful trap-crops. Losses in Texas 

 from this insect have been particularly heavy. Eleodes opaca (false 

 wireworm) has caused severe injury to wheat in Kansas. Pymusta 

 nuhilalis Hb. (European corn-stalk borer) is very abundant on maize 

 in Eastern Massachusetts, and is causing so much anxiety that it may 

 be made a subject of quarantine. 



Cory (E. N.). Insects of 1916.— Maryland Expi. Sta., College Park, 

 n. d., 12 pp., 2 figs. [Received 25th June 1918.] 



A brief and popular account is given of the following pests, taken 

 from the year's records of over 60 injurious species in Maryland, and 

 the usual methods of control for each are outlined : Aphis pomi, De G., 

 A. avenae, F., A. sorbi, Kalt., Cydia {Laspeyresia) molesta, Busck, 

 Cydia (Carpocapsa) pomonella, L., Phyllotreta vittata, F., Pierisrapae, L., 

 Phytometra (Plusia.) brassicae, Riley, Haltica citri, Ashm., Typophorus 

 canellus, Lee. (strawberry leaf beetle), Neocerata (Dasynenra) 

 rhodophaga, Coq. (rose midge), Lopidea media, Say (phlox plant 

 bug), and Cecidomyia catalpae, Comst. (catalpa midge). 



Wood (W. B.) & Selkregg (E. R.). Further Notes on Laspeyreda 

 molesta. — Separate from Jl. Agric. Research, Washington, B.C., 

 xiii, no. 1, 1st April 1918, pp. 59-72, 10 plates. [Received 

 21st June 1918.] 



Further investigations on the life-histor}% habits and control of 

 Cydia {Laspeyresia) molesta, Busck (Oriental peach moth) have been 

 made since the publication of a preliminary paper [see this Review, 

 Ser. A, V, p. 75, also above, p. 369]. 



The food-plants of this pest, other than the peach, are cherry, plum, 

 apricot, several varieties of flowering cherries, quince, pear, apple 

 and flowering quince ; of pomaceous fruits the quince is decidedly 

 the favourite. It is possible that the insect travels from orchard to 

 orchard by flight, since the moth is a strong flier at dusk and during 

 cloudy days. 



The character of injury and the amount of damage vary at different 

 seasons of the year and on different food-plants, and though the 

 damage caused by each of the early generations is separated from 

 that due to the next by a distinct interval, later in the season the 

 injury from each succeeding generation increases in severity without 

 any such intervals. 



The injury to twigs, which occurs mostly before midsummer, may 

 not be noticed for several days after the newly hatched larvae have 

 begun work, if the weather is cool and damj:*, but it becomes evident 

 much sooner if the weather is hot. On peach it show^s most plainly 

 at midday or in the afternoon. T\^ng injury is most severe on the 

 peach, quince, plum, ajople, pear, nectarine and apricot, following 

 in order. 



The fruit of the peach is attacked by larvae of the second generation 

 when it is about the size of a chestnut. The injury caused by their 

 boring through it does not result in its rotting or fall. Mid-season 



