-12G- 
E. C. Cushing (April 22) : Screvworms have reached as far north 
as an east— and west-line from Fort. Stockton to Llano. Ce,ses appeared 
at Menard on April l4, which is about 3 weeks earlier than last, year. 
This appears to substantiate the belief that the fly overwintered 
from 50 to 100 miles farther north than a yean ago. Reported as 
building up in the Refugio County section, in the southeastern part. 
The population in the Laredo section is rather high and activity 
is increasing. Inf e.stn,tion in calves from 3 days to 2 weeks old 
ran an high an 10 percent on some ranches in the thick brushy 
section of Zavala, and Uvalde Counties on April 19. Screwworm is 
likely to spread becanse large numbers of cattle and other livestock 
are beginning to move by truck within the State. Infested animals 
have been shipped from Uvalde County to Northern States. 
California. C. C. Deonier (April 26) ! No _C. americana cases were found 
in a brief survey in the Sacramento Valley from Redding to Davis, 
nor was 0 . macellaria R. observed. 
HORN FLY ( Haematobia irritans L.) ' 
Florida. W. E. Dove (April 2S): About 500 horn flies were present on darl 
colored animals at the laboratory and in Panama City they are now 
becoming numerous on range cattle. 
Oklahoma. . W. 0. Bruce (April 9 ) ' Very few observed on ca.ttle at Waurika, 
in the soxithorn pent of the Stale. 
Texr.s. W. G-. Bruce (April 23) : First appearance on caltle el Dallas was 
noted on March 10, when a total of 3 flies .was found on S head 
of caltle. Forty-two flies were found on 6 head of cattle on 
Mo„rch 21, 100 flies on 1 -animal on April 7> end approximately 200 
flies on 1 animal on April 11. Largest number from overwintering 
cages emerged during the period April 7 to April 20, and dales of 
maximum emergence from c.ages arc almost identical with those of 1940. 
STABLEFLY ( Stomoxys calcitrans L.) 
Florida.. V. E. Dove (April 25) • Increased numbers of dogflies were 
reported in the vicinity of Sarasota. (April 30 ) • During the latter 
half of this month adults have ceased to emerge in overwintering 
cages -containing peanut litter. Breeding is beginning in mixtures 
of manure and stra w about some local dairies. ' 
F. C. Bishopp.et al. (April 2o) : Few noted causing slight 
annoyance at Coronado Beach, on March 15. Dog flies continued to 
emerge from peanut litter f throughout January, February, and March, 
with some Very heavy infestations furnishing flies at the rate of 
2»505 P er cubic foot of litter. 
Texas. B. U. Laake (April 23) ? Heavy breeding has continued throughout 
the month. Cattle in vicinity of Dallas have been annoyed all 
winter and increasingly so during April, as many as 100 flies on 
the forelegs of one animal being common among dairy cattle. 
