-107- 
horn fly bites 2, warts Q, hog bites 13U, boils 19, and others 38. The 
larger number occurred in navels of young animals and in surgical opera- 
tions which received infestations during the abnormally early occurrence 
of the spring season. In Texas specimens of £. americana, larvae occurred 
in localized areas as far west as Comstock, and a fly was found ay 77, L. 
Barrett at Langtry (both in Val Verde County). The most northern point 
was Sonora, and the most eastern point was in Matagorda County. Localized 
outbreaks on individual ranches were found in Uvalde, Kinney, and Bexar 
Counties, where stockmen made efforts to get the cases treated. The shear- 
ing of sheep is advancing ahead of the spread of screwworms and shear cuts 
are being treated by stockmen throughout the sheep- and goat-breeding area. 
Efforts are being made to prevent a big build-up of a screwworm population. 
For the H-week period ended April 23, there were 1,939 cases reported from 
the southern counties of Texas. They occurred as follows: Cattle 1,707, 
hogs 5. horses 36, goats 36, sheep l'j>H, and others 1. The predisposing 
causes were as follows: Castrations lUl, dehorning 55. branding 32, shear 
cuts 23, lamb docking 59». mothers of young UU, navels of young l,kkb, dog 
bites 33» snags and scratches 62, warts 1, hog bites 1, boils 1, rams 
fighting 5 1 and others 35» Stockmen with infested animals are screwworm 
conscious and are treating their cases promptly. 
STABLE PLY (Stomoxys calci trans L. ) 
Georgia. E. R. McGovran (April 26): On warm days during January, February, and 
March a few stable flies were observed annoying cattle in the vicinity of 
Valdosta. 
Mississippi. E. 77. Dunnan (April 15): The stable fly has been moderately abun- 
dant throughout the winter and is now present in great numbers in Washing- 
ton County. 
Texas. E. 77. Laake (April 20): Stable flies are still rather scarce, there 
being an average of about 5 P er animal on a dairy herd of approximately 
80 cows. 
HORN FLY ( Haem atobia i rritan s L. ) 
Georgia. E. R. McGovran (March): On warm days during January, February, and 
March, a few horn flies were observed feeding on cattle in the vicinity of 
Valdosta. Luring the latter part of March there was a noticeable increase 
in the number of horn flies attacking cattle. 
Texas. E. F. Knipling (April 12): Horn flies were estimated to average 150 per 
head on cattle in the northern part of Cameron County. Horn flies on about 
50 cattle observed on April 12 in the western part :>f Hidalgo County and 
in Starr County averaged less than ^ per head. 
Texas. E. 7?. Laake (April 20): Horn, flies have increased rapidly during the 
last week or twc. The average number per animal on a dairy hnrd of about 
SO animals was approximately 100. 
BUFFALO GNATS (Eusim ulium spp.) 
Mississippi. C. Lyle (April 2H): On account of alternating periods of warm 
and. cold weather this spring, buffalo gnats have not caused as much trou- 
ble as was expected. Luring the past month they have been observed at 
various localities in the Delta and in the adjacent hill sections. A 
