- 13b - 
some complaints were received at Port Pierce, especially from 
workers or. the island cast of there, and residents living along 
the Indian River. Some of the workers on the island quit work 
on account of the- flies. 
TROPICAL RAT MITE ( Liponyssus Dacoti Hirst) 
Kentucky. Dorsey Drug Co. (April 19): Mites were found on rats in 
Horse Cave on April 11. (Dot. "by II. E. Ewing.) 
AMERICAN DOG TICK ( Dermacontor variabilis Say) 
Massachusetts. C. N. Smith (April 1): All stages of the American dog 
tick "became active towards the end of March, on Martha's Vineyard 
Island. The.. first adults were found March 21 and a few specimens 
have "been taken daily since that tine. The first larvae appeared 
on March 21 and a single nynph was taken on March 29. 
District of Columbia. F. C. Bishopp (April 26): It is indicated from 
reports received from residents of the District and outlying sub- 
urban areas that the American dog tick made its first appearance 
about April 1, and that it has been building up quite rapidly since, 
... ROCKY MOUNTAIN SPOTTED FEVER TICK ( Dernacontor andorsoni Stilos) 
Washington. 1,1. C. Lane (April 19) : • The Rocky Mountain spotted fever 
ticK was abundant in the foothills of the Blue Mountains on 
April 15. 
CATTLE .' 
ST A3LEFLY ( Stomoxys calci trans L . ) , 
Georgia. A. L. Brody (April IS): The staolefly has been annoying to 
cattle around Valdosta. Usually from 25 to 50 ar° observed on 
each head of cattle. 
Texas. E. W. Laakc (April 25): The stahlefly apparently varies in 
abundance at different places in the vicinity of Dallas and Fort 
Worth, and ranges from 2 or 3 flies per animal, where the cattle 
graze in open pastures, to as high as 50 per head, where the ani- 
mals arc around barns or corrals. 
HORN. FLY ( Haematobia irritans L. ) 
Georgia. A. L. Brody (April IS) : Horn flies have not increased in 
numbers during the past month at Valdosta. The usual number seen 
on steers in this locality ranges from 100 to 200 per animal. 
Texas. E. W. Laake (April 25): By April 1 horn fly populations of 
2,000 per head on cattle were common in the vicinity west of Fort 
Worth, Tex., and about 500 per head' were observed on cattle at 
