Report of the State Entomologist. 199 



The Ox Warble-%. (Country Gentleman, for June 23, 1887, lii, 

 p. 493, c. 1-3 — 106 cm.) 



What warbles are : different species of warble-flies ; figure and descrip- 

 tion of the ox warble-fly and its life-history ; habits of the larva and 

 figures. The best method of dealing with this insect is to kill the mag- 

 got in March and April by applying to the opening in the warble a 

 little mercurial ointment. Reference to the old method of for- 

 cing out. The ointment sometimes applied before openings appear. 

 Other thick adhesive material tliat may be applied to arrest respiration. 

 Natural liistory of the insect. Applications for prevention need to be 

 long continued, and are, therefore, not as simple as killing. Some pre- 

 ventives named. Eeference to, and figure of, the ox gad-fly, Tabanus 

 bovimis Linn. 



Grape-vine Leaf-hopi)er. (Country Gentleman, for June 23, 1887, lii, 

 p. 493, c. 4 — 33 cm.) 



Insects destroying grapevines in Clearfield, Pa., are not " thrips " as 

 commonly named, but species of Erythroneura, of the Hemiptera; the 

 general appearance and operations of these leaf-hoppers; a common 

 one is the Teltigonia vitis of Harris, which is described. The young 

 leaf-hopper may be killed with soajxsuds, or tobacco water, or the 

 kerosene emulsion. When winged, they may be driven on a piece of 

 building-paper coated with gas-tar stretched between the rows of the 

 vineyard. 



The Rose-Bug. (Country Gentleman, for June 30, 1887, lii, p. 511, 

 c. 1-2 — 35 cm.) 



Rose-bugs from Onondaga county, N. Y., and Cumberland county, 

 N. J., attacking peach, corn, grape, and blackberry are identified. No 

 means for fully controlling it yet known ; is a local insect, and believed 

 to breed in sandy soil. Beating and jarring from plants and trees has 

 long been practiced successfully. When on corn might be poisoned 

 _with Paris green or London purple. Dusting the foliage with some dry 

 powdery substance is a good preventive. Lures for concentrating 

 attack are the Clinton grapevine and valerian. Account of the success 

 of the last-named lure. 



The Hop-X/ouse. (Coimtry Gentleman, for June 30, 1887, lii, y*. 511, 

 c. 2-3 — 23 cm.) 



In answer to reciuest for remedies for Phorodon hvmuli, reply is 

 made that none will probably be needed this year. In years of its 

 abundance, the English custom of hop-washing will have to be adopted 

 in this country, to insure remunerative crops. The machine used in 

 England for this purpose is described, and the wash of quassia extract, 

 soft-soap and water given. Reference made to present investigations 

 in the life-history of this insect by the Division of Entomology at 

 Washington. 



