477 



boxwood and acacias ; Aulacaspis rosae, Bch. (rose scale) ; Epidiaspis 

 'piricola, del Guerc. (Italian pear scale), which attacks the Christmas 

 berry ; Aspidiotus jjerniciosus, Comst. ; and Eulecanium (Lecanium) 

 corni, Bch. 



In addition to the above scale- insects the following pests are of 

 importance : Phrycjanidia californica, Pack. (California oak worm) ; 

 Therina somniaria, Hulst (oak worm looper) ; Phloeosinus cupressi, 

 Hopk., and P. cristatiis, Lee. (cypress bark-beetles) ; Agrilus angelicus, 

 Horn (oak twig-girdler) ; Prionoxystus robiniae, Peck, (carpenter 

 worm), which injures oaks, elms and cottonwoods ; Chrysobothris 

 femorata, F., and C. mail, Horn (flat- headed borers), which destroy the 

 cambium of many shade as well as fruit trees ; and the bark-beetles, 

 Pityophthorus pubipennis, Lee, destroying oaks, and Dendroctonus 

 valens, Lee, IjJS radiatae, Hopk., and /. flastographus, Lee, destructive 

 to pines. 



Morrill (A. W.). The Value of Molasses and Syrups in Poisoned 

 Baits for Grasshoppers and Cutworms. — //. Econ. Entom., Concord, 

 N.H., xii, no. 4, August 1919, pp. 337-343. 



The history of poison-baits with reference to molasses is reviewed 

 and recent observations made by the author on baits for Melanoplus 

 differentialis and Fellia annexa are described. Results show that in most 

 cases the addition of molasses or syrups to baits for grasshoppers and 

 cutworms is unnecessary. 



DE Ong (E. R.). Effect of excessive Sterilization Measures on the 

 Germination of Seeds. — Jl. Econ. Entom., Concord, N.H., xii, 

 no. 4, August 1919, pp. 343-345. 



In experiments made to ascertain whether the germination of seeds 

 is affected by fumigation or heat, various crops were tested o§ which 

 a list is given, comprising 58 varieties. The results all show that the 

 method is safe both for grains and legumes at the dosages commonly 

 used, provided that the proper precautions as to length of exposure and 

 ventilation afterwards are taken. The details of the effects on beans 

 of exposure to heat, hydrocyanic gas and carbon bisulphide are given. 

 The most striking variation was noticed in beans, showing a range of 

 germination from 22 to 100 per cent., though the average of the 

 whole group proved only 5 per cent, less than that of the control. 



CocKERELL (T. D. A.). On the Absence of Insect Pests in certain 

 Localities and on certain Plants. — Jl. Econ. Entom. ^ Concord, 

 N.H., xii, no. 4, August 1919, pp. 345-347. 



Observations show that in certain localities some crops are free 

 from particular pests. It is therefore pointed out that it is an important 

 function of entomologists to ascertain the optinmm regions for given 

 crops, and maps sliould be prepared to indicate these. 



