ENTOMOLOGY. 67 



The author does not seem to consider the outlook for 1897 bad, pro- 

 vided there be drenching rains during the breeding season of the 

 insect; but, inasmuch as the experiences of the past 3 years have shown 

 him that no one can tell where the trouble may break out, he thinks it is 

 dvisable to burn over the roadsides, fence corners, and leaves in the 

 woods where the insects hibernate, and in the spring sow as early as 

 possible small plats of millet in damp places about fields to serve as a 

 bait to females and to induce them to deposit eggs there rather than in 

 the wheat fields. 



Some destructive insects that need to be watched for in Ohio. — The author 

 describes in a popular manner 4 destructive foreign insects, namely, 

 the sinuate pear borer (Agrilus sinuatits), the pear midge (Dijylosis 

 pyrivora), the wood leopard moth (Zeuzera pyrina), and the cabbage 

 curculio (Ceutorhynchus rapce). The last is already found in Ohio. 



Notes on injurious insects, H. Osborn (Iowa Sta. But 33, pp. 

 591-005, fig. 5). — These notes concern the hickory bark beetle (Sco- 

 lytiis 1-spinosus), the chicken mite (Dermanyssus gallince), the blister 

 beetle [Epicauta penmylvanica)j the army worm [Leueania unipuncta), 

 a new pest of potatoes (Empoasca mali), the Hessian fly, and the sheep 

 foot louse (Hcematopinus pedalis), a new sheep pest. 



Remedies are noted and very brief descriptions of the pests given. 

 London purple, used in the form of a spray, is recommended against 

 the hickory bark beetle, cutworms, the blister beetle, and the 

 army worm. Burning off stubble is recommended as a means of dispos- 

 ing of the Hessian fly. For the mites and lice the use of kerosene 

 emulsion is recommended. Experiments were performed with London 

 purple to determine whether a mixture of this substance with flour at 

 the rate of 1 part to 15 parts of the flour, or a spraying solution made 

 in the proportions of 1 lb. to 200 gal. of water, is preferable. Ten rows 

 of mangel-wurzels were dusted with the dry powder in the morning 

 while the dew was on the leaves, but the day being a windy one the 

 application of the powder was discontinued, although the experiment 

 was carried far enough to show that the treatment might be effective. 

 This method, however, has the disadvantage of being much more 

 expensive than spraying on account of the time and material required. 



Spraying gave excellent results and in no way injured the leaves, 

 while it so effectually destroyed the insects that within a few days 

 hardly a live one could be found. An ordinary hand spray pump and 

 a 50-gal. barrel were used, which required one man to do the pumping 

 and another to handle the nozzle. For the 4 or 5 acres sprayed 200 

 gal. of the solution were required; and counting London purple at 8 

 ets. per pound the cost of the material per acre was less than 2 cts. 

 But including the labor the cost amounted to about $1 per acre. 



The army worm was reported this season to the station for the first 

 time. If the worms were present before, they were seldom so abun- 

 dant as to attract attention. The damage they did this year was one 



