1016] ECONOMIC ZOOLOGY — ENTOMOLOGY. 661 



In orchards where tent caterpillars are controlled, defoliation caused by spray 

 injury is far less than the damage caused by these pests in neglected orchards. 

 Our experience shows that after fruit gi-owers have been convinced of the 

 results obtained by the use of the poisoned bait spray, many prefer sound 

 fruit even if burned foliage is the necessary price. 



" The fruit fly remedy has been a complete failure in the control of the pest 

 under town conditions. With four applications of the spray the infestation 

 varied from 4 to 98 per cent." 



Dangerous hard backs, H. A. Baxlou (Agr. News [Barbados], 15 {1916), No. 

 359, pp. 42, 43, fiffs. 5). — An account of the more important lamellicorn grubs 

 occurring in the West Indies. 



Second report on insecticides for the control of the Colorado potato beetle 

 (Leptinotarsa decemliiaeata), L. B. Smith (Virginia Truck Sta. Bid. 11 (1915), 

 pp. 369-316). — This paper gives the results of the second season's experiments 

 in the control of the Colorado potato beetle. These results are said to confirm 

 the more important points of the work done the previous season (E. S. R., 33, 

 p. 358). 



The mixture of homemade Bordeaux 50 gal., arsenate of lead 4 lbs., and 

 Paris green 1 lb., continued to give excellent results. Arsenite of zinc paste 

 at the rate of 2 lbs. to 50 gal. of Bordeaux also proved very efficient. Calcium 

 arsenate was tried this year and the results indicate that it may prove valu- 

 able for the purpose. Several of the proprietary insecticides that were used 

 gave returns that compared favorably with the home-prepared mixtures in effi- 

 ciency. The price of arsenic oxid varied according to the form in which it was 

 obtained, costing 24^ cts. per pound in the calcium arsenate powder and 

 51s cts. in powdered lead arsenate. 



Sulphur-arsenical dusts against the strawberry weevil (Anthonomus sig- 

 natus), T. J. Headlee (Jour. Econ. Ent., 9 (1916), No. 1, pp. 84-89, fig. 1).— 

 Substantially noted from another source (E. S. R., 35, p. 364). 



Life history of the pecan twig girdler, S. W. Bif.sing (Jour. Econ. Ent., 

 9 (1916), No. 1, pp. 110-115). — The eggs of Oncideres texana hatch in from 17 

 to 30 days after deposition. The larvae then burrow in the girdled twigs until 

 the following summer, or for a period of from 288 to 328 days. Pupation takes 

 place during the latter part of August and the first part of September, the 

 pupal stage which lasts from 12 to 14 days being passed in the larval burrow. 



It was found that where forests are located near a pecan orchard and it is 

 impractical because of migration from other trees in pecan trees, to gather 

 up the fallen twigs and burn them in order to kill the larvae, they may be 

 effectually dealt with through the use of arsenate of lead. 



The German genera and species of the ichneumonid tribe Anomalini, 

 O. ScHMiEDEKNECHT (Naturw. Ztsclir. Forst u. Landw., I4 (1916), No. 3-4, pp. 

 97-116, figs. 4)- — A synopsis of the forms of this important tribe (parasites of 

 Lepidoptera) which occur in Germany. 



Note on an interesting case of two generations of a parasite reared from 

 the same individual host, P. H. Timbeelake (Canad. Ent., 48 (1916), No. 3, 

 pp. 89-91 ) . — The author records the rearing of two generations of the braconid 

 parasite Dinocampus americanus from the convergent lady beetle (Hippodamia 

 convergens). This shows that this parasite does not injure the vital organs 

 of its host. 



The European Trichogrammlnae, with particular consideration of their 

 practical importance as parasites, M. Wolff (Ztschr. Forst u. Jagdw., 47 

 (1915), Nos. 8, pp. 474-497; 9, pp. 543-568, figs. 24).— A synopsis of the Euro- 

 pean forms of this important subfamily of parasites. 



