CATPL 5 
SCREsJwOHIvI (Chrysorny a mac ell a ria Fat.) 
Texas Fo C. Eishopp (September 30)* Owing to the hot, dry weather 
which has prevailed throughout the Southwest most of the summer 
and fall, little damage has been experienced by stockmen from 
the screwworm. Showers falling in September may cause sufficient 
increase in the fly number to result in infestations of sheep 
following shearing, wlhich will be in full sway about October 10„ 
(October 25): Screwworm cases in southwestern Texas daring 
October have been much less abundant than normal* Although 
some sheep and goats were infested after shearing, the cases 
were usually light and healed after a single treatment. 
At \7orth packing houses on this date flies are fairly 
numerous and are giving some trouble trying to get indoors on 
account of cool nights. The proportion of the species is about 
as follows:. C. mac ell aria ^5 P er cent, M. d omestica L . U7 per 
cent, P. retina Meig. 7 per cent, and Luc il ia sericata Meig. 
and other species 1 per cent, 
HORN FLY ( Haematobia irritans L. ) 
GENERAL 3?«, C. Bishopp (September 30) : During the latter part of 
STATEMENT September horn flies incf eased decidedly in number in various 
parts of Texas, owing to a cessation of the hot, dry weather which 
had held the pest closely in check during the summer » At 
Dallas on September 25 the number of flies per animal ranged 
from 25 to 2,500 and dairymen were beginning to complain of the 
worry produced among their cattle. 
Comparatively few horn flies were present on livestock in 
northern Florida and southern Georgia, Alabama, Mississippi, 
and Louisiana on September k to 11, The usual dry weather 
of the late summer is undoubtedly responsible for . lis 
- conditions 
Texas F. C Bishopp (October 25): Horn flies have decreased in 
numbers during the last few days. During the first tw?-thirds 
of the month they were abeut normal in abundance and their 
annoyance combined with that of the stable fly seriously 
affected milk production in dairies in north -central Texas, 
STABLE FLY (S tomoxys calcitrans L . ) 
GENERAL F C. Bishopp (September 30): September 5 to 11, with the 
STATEMENT exception of a small area -til southern Mississippi near Biloxi, 
stable flies were causing little annoyance to livestock along 
the highway from Jacksonville, Fla. , to Houston, Tex. Near 
Biloxi cattle were observed to be infested with from 25, to 
several hundred flies each. 
In the vicinity of Dallas, Texas, up to September 25 ,stable 
flies had not materially increased in numbers, the average 
number per animal ranging from none to about 3°. Teams breaking 
stubble land are not experiencing the amount of annoyance usual 
for this time of the year. 
