- 623 - 



Halleyville and Hartshorne area of Pittsburg County (EC) . Many spots larger and more 

 heavily damaged by this generation than by first. (Okla. Coop. Sur.). 



WALKINGSTICK ( Diapheromera femora ta ) - OKLAHOMA - All stages caused heavy defolia- 

 tion of oaks (mainly black) in scattered areas of southern LeFlore County ' 

 Largest area (3 or 4 square miles) 5 miles south of Big Cedar, but 4 other smaller 

 areas found on State Highway 1 between U.S. 271 and U.S. 259. Defoliation up to 

 100 percent. (Okla. Coop. Sur.). 



EASTERN SPRUCE GALL APHID (Adelges abietis) - WEST VIRGINIA - Infestation fifty 

 percent on 12 acre block of Norway spruce in Wetzel County, August 12. 

 (W. Va. Ins. Sur.) . 



MAN AND ANIMALS 



SCREWWORM ( Cochliomyia hominivorax ) - Total of 10 cases reported in U.S. 

 August 15-21 as follows: TEXAS - Kinney 1, Val Verde 1, Starr 1, Bowie 2, 

 Lampasas 1; ARKANSAS - Little River 4. (Anim. Health Div.). 



HORN FLY ( Haematobia irritans ) - IDAHO - Ranged from 100 to 300 per animal on 

 beef and dairy cattle herds in St. Anthony and Ashton, Fremont County, August 10. 

 (Peebles, Sutherland). TEXAS - Heavy on cattle in Trans-Pecos area. Ranged 300- 

 1,500 flies per animal from most counties. Populations generally increased in most 

 panhandle counties receiving recent rains. Populations increasing rapidly in 

 south-central area. (Neeb et al.). IOWA - Ranged 25-250 (averaged 112) per side 

 on untreated herd in Dallas County August 17. (Iowa Ins. Sur.). 



MOSQUITOES - MINNESOTA - Light trap collections for week ending August 13 

 more than doubled. Aedes vexans accounted for 89 percent of 12,491 females 

 taken. Apparently adults blown in; no larvae of A. vexans in water to account 

 for large numbers. Of 230 larval collection, 135 were from tree holes. To date 

 over 400 water-containing tree holes found producing A. triseriatus . Eight 

 breeding sites of Culex tarsalis found. (Minn. Pest Rpt.).OHIO - Five mosquito 

 traps in Franklin County on nights of August 9, 10, and 12 averaged 14.9 

 (range 1-42) females per trap per night. Species totals as follows: Aedes 

 vexans 78, Anopheles punctipennis 100, Culex spp . 36, C. restuans 9. (Ohio 

 Dept. of Health) . ~ 



STABLE FLY ( Stomoxys calcitrans ) - WISCONSIN - Moderate to severe on cattle in 

 Adams, Columbia, Rock, Calumet, Sauk, Juneau, Kewaunee, and Dane Counties. 

 (Wis. Ins. Sur.). OKLAHOMA - Moderate to heavy on feedlot cattle checked in 

 Cimarron County. 



FACE FLY ( Musca autumnalis ) - MISSISSIPPI - Average of 5 per head on cattle in 



2 herds in Monroe County. (Robinson). MARYLAND - Adults averaged 61 per head on 



51 head of untreated Holsteins in Frederick County. (U. of Md. Ent. Dept.). 



WISCONSIN - Severe annoyance to cattle in parts of Columbia, Sauk, Iron and 



Juneau Counties. Elsewhere, light to moderate. (Wis. Ins. Sur.). IOWA - Ranged 10-30 



(averaged 19) per face on untreated cattle on pasture in Dallas County August 17. (Iowa 



Ins . Sur.) . 



AMERICAN DOG TICK ( Dermacentor variabilis ) - ALABAMA - Numerous specimens 

 taken from cow with fever at Marion, Perry County. Collected by M.I. Crawford 

 (McQueen) . 



BENEFICIAL INSECTS 



A BRACONID ( Lysiphlebus testaceipes ) - COLORADO - Beginning to build up in 

 sorghum where Schizaphis graminum Tgreenbug) populations heavy (Schweissing) . 



