442 Forty-sixth Effort on the State Museum 



The Cow-Horn Fly. (Country Gentleman, for June 30, 1892, Ivii,. 

 p. 501, c. 2—16 cm.) 



A remedy is asked for the fly, Hcematobia serrata, which is occurring " in 

 milUons " in Madison county, N. Y. It is rapidly incx'easing and spreading 

 throughout this State, and has also appeared in Ohio, Kentucky and Missis- 

 sippi. Any of the greases or oils with some carbolic acid, if rubbed on the 

 cattle, will usually act as a repellant, as also tobacco-dust rubbed into the 

 hair. Spraying the cattle with kerosene emulsion two or three times a week 

 will drive away the flies and prevent their return. The larva? may be kiUed 

 by daily spreading thinly the fresh droppings where they breed or by 

 sprinkling lime thereon. 



The Meal-Worm, Tenebrio Obscurus. (Country Gentleman, for 

 June 30, 1892, Ivii, p. 501, c. 2, 3—18 cm.) 



Insects infesting wheat in a granary in Buckland, Va., are the American 

 meal-worm, Tenebrio obscurus Fabr. The larva and beetle are character- 

 ized ; is more injurious than the European T. molitor, as it prefers dry and 

 sound flour ; both infest granaries, mills, and farm houses. The best remedy 

 for it is bisulphide of carbon, used as directed, one ounce to a hundred 

 pounds of grain. The dead insects should be removed from the grain, as 

 serious results have followed their having been ground into the flour. 



[Extended in pp. 307-309 of this Report (ix).] 



The Pear-Leaf Blister. (Country Gentleman, for June 30, 1892, 

 Ivii, p. 504, c. 2 — 7 cm.) 



Leaves from Carlton, N. Y., are nearly covered with the pear-leaf blister, 

 caused by the operations of the microscopic mite, Phytoptns pyri Sulphur 

 has been used for killing, but when applied it can reach so few of the concealed 

 mites that it is not effective. The best remedies are found in picking off 

 and burning the infested leaves or the branches, heavy pruning in the winter 

 or spring, or in the removal of the infested tree. Reference is made to the 

 Country Gentleman of October 2d, 1890, for further information of the Phy- 

 toptidfe and of the species. 



Injuries to a Maple Tree. (Country Gentleman, for July 21, 1892, 

 Ivii, p. 552, c. 2 — 8 cm.) 



The tree has probably been attacked by the maple-tree borer, Olycobius 

 speciosus. The remedies for this attack are given. The eggs observed under 

 a thin gray film on the bark could not have been the source of the attack. 



A Cauliflower Pest. (Country Gentleman, for August 11, 1892, 

 Ivii, p. 600, c. 3—6 cm.) 



Pieris rapce is identified as injurious to cauliflowers at Cheviot-on-Hudson. 

 Recommendation is made to mix fresh pyrethrum powder with four times 

 its bulk of flour, and, after it has stood for twenty-four hours, to dust it 

 thinly over the caterpillars. 



