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AMERICAN DOG TICK ( Dgrmaoentor variabilis Say) 
Maryland and Virginia, F-« 0, Bishopp (April ^0) : Reports indicate that 
this tick is quite abundant in the District of Columbia and nearby Mary- 
land and Virginia, Some dogs are said to carry as many as 50 ticks. 
The pest began to appear early in April and increased markedly toward 
the end of the month, 
CATTIE 
SCREW WORMS (C ochliomyia spp,) 
Georgia, E. C. Cushing (May 1): R, A, Roberts, of the Savannah laboratory, 
reports that screw worm cases are of frequent occurrence in the southern 
counties. Counties in the vicinity of Savannah reported two such cases 
each. Infestations are appearing as far north as Fulton and McDuffle 
Counties, The laboratory is receiving an increasing number of requests 
daily from county agents and stockmen for materials to treat cases, 
Florida, E, C. Cushing (May 1): W, V, King states that replies received 
from 22 county agents in north-central Florida from April 11 to 15 
indicate an increasing number of cases in 15 counties and a rapid in- 
crease in 2 others. Infestations are occurring in central Florida in 
areas uninfested last year. Many cases were reported from southwestern 
counties during the last 10 days of April, There is every indication 
that ths number of cases will show a rapid increase in the northern 
counties during May, Later reports indicate thai serious trouble is 
developing in Highlands and Osceola Counties, 
Texas, E, C, Cushing (May 1): At Sonora it has been reported that screw 
worm flies have been rapidly increasing since the first of April, not- 
withstanding the continued dry weather, 
D, C, Pariaan (April 30) : A great many screw worm cases were report- 
ed around Uvalde late in March and early in April, but the cool weather 
later in April checked the pest. There are now about three cases per 
1,000 head in sheep and one per 1,000 head in cattle, 
HORN FLY ( Haematobia i rritans L. ) 
Mississippi, C. Lyle (April 23): Inspector F. A. Smith reports that the 
horn fly was very abundant at Courtis nd on April l8, 
Missouri, L. Haseman (April 22): As yet horn flies have not appeared in 
any numbers on cattle, 
Kansas. H. R. Bryson (April 27): E. G, Kelly reported the horn fly as 
attacking cattle for the first time this year on April 5 in Clay County 
and on April 4 in Washington County, 
