356 EXPEEIMENT STATION RECOED. 



liberated in apple orchards badly iufested with woolly aphis. The ladybird in 

 question has shown itself to be very efficient, having practically annihilated 

 the woolly aphis on the majority of the apple trees. A number of native lady- 

 birds are beneficial. 



The mite disease of grapevines, H. Muller-Thukgau {CentM. Bakt. [etc.], 

 2. AM., 15 (1905), Ao. 19-20, pp. 623-629, fio-s. 2).— The disease caused by this 

 mite was at first not understood. Since the discovery of the mite, liowever, 

 successful remedies have been devised. The remedies suggested by the author 

 include spraying with a 4 per cent solution of lysol. a 3 per cent solution of soda, 

 or a 1 per cent solution of carbolic acid. Badly infested parts may be removed 

 and destroyed. 



Winter treatment for acariosis of grapes, H. Faes (Cliron. Agr. Yaiid, 

 19 {1906), No. 3. PI). ■'i3-.'f9, pi. 1). — Lysol in 4 per cent solution gave excellent 

 results in laboratory tests. It moistened the wood instantly and penetrated 

 into all cracks, killing the mites promptly. A mixture containing 3 per cent 

 black soap and 1 per cent carbolic acid gave results about equal to those 

 obtained with ly.sol. A 30 per cent solution of iron to which 1 per cent sul- 

 phuric acid was added was effective in destroying the mites, but did not spread 

 so readily as lysol. 



Margorodes vitium, J. M. IIuergo {BoJ. Min. Agr. [Buenos Ayres], 5 {1906), 

 No. 3, pp. 321-325). — This insect causes great damage to grapes, but in some 

 cases it appears that the injury attributed to it has been caused by nematode 

 root worms and other diseases. 



The insects affecting the black locust and hardy catalpa, E. C Cotton 

 {Ohio Dept. Agr., Div. Nursery and Orchard Insp. Bui. 7, pp. 55, ^igs. 11). — On 

 account of the increased demand for black locust as railroad ties and for similai- 

 purposes, the study of its insect pests assumes considerable importance. This 

 tree is seriously attacked by a number of pests, the most important of which Is 

 the locust borer. The insect injury is exceedingly serious, particularly on 

 account of the fact that it is not readily detected in the early stages of attack. 

 Detailed notes are given on the habits, life history, and injuries caused by the 

 locust borer, locust carpenter moth, Odoiitota dursalis, Ecdytoloplia insiticiana, 

 Crepidodera rufipes, Apion nigrum, locust sawfiy, San Jose scale, Ceci'opia moth, 

 and numerous other species which injure the locust more or less. 



The hardy catalpa is much less seriously attacked by insect pests. The author 

 discusses the more serious of these enemies, including Ceraioiitia catalpa'. Cccido- 

 myia catalpa', fall webworm, white grubs> and other insects. 



Elm-leaf beetle, V. Ma yet {Prog. Agr. et Vit. {Ed. VEst). 27 {1906), No. 25, 

 pp. 725-728, pi. 1). — An account is given of the habits, natural enemies, and 

 means of combating this pest. A large number of insects prey upon it. but these 

 are not suflicient to hold it in check. Spraying with arsenicals is a satisfactory 

 treatment. 



Injuries to trees by insects, G. Cecconi {titas. Sper. Agr. Itah, 38 {1905), 

 No. 10-12, pp. 865-905, pis. 7). — Particular attention is given in this article to an 

 account of the life history, habits, and injurious attacks of white ants and 

 A'arious species of moths, beetles, and other insects which injure forest trees. 



Two enemies of Juniperus communis, Y. Torka {Naturw. Ztschr. Land u. 

 Forstio., Jf {1906), No. 9, pp. 399-IfOJt, figs. 5). — While the common cedar is not 

 considered of much value in Germany, it has nevertheless been found necessary 

 to devote some attention to its insect enemies. The author presents notes on the 

 habits, life history, and injurious attacks of Phlwosiiius thuja' and Callidium 

 castancuiii. 



A note on the life history of Hoplocerambyx spinicornis, E. P. Stebbing 



