.BLACK FLY (Simulium sp. prob . pecuarum Riley) 
Louisiana T« H„ Jonas (May 10): This fly is coram on enough, 
especially early in the morning and late in the afternoon, 
to cause considerable annoyances 
CHIGGERS (Trombicula tlalsahuatl M urray) 
North America Monthly News Letter, Bureau of Entomology, No. 108 
(April ,1923) J The question is often asked how many 
species of chiggers there are in North .America. Based 
on. the material submitted for identification through 
the channels of the Bureau and the National Museum, 
Dr. Swing finds that there is only one common species 
in North America, This species is Trombicula 
. tlalzahuatl, and is generally distributed in North 
America, and from the Atlantic Ocean to the Rocky 
Mountains* 
Texas F. Co Bishopp (5i*y 23): Redbugs or chiggers, which first 
began annoying man about May l,have greatly increased 
in numbers during the past two weeks, 
CATTLE 
. . OX WARBLE 4 (Hypoderma bovis DeG.) 
New Hampshire P. R* Lowry (May l) : Ox warble infestation is light- 
but general in the vicinity of Durham. 
New York R» W* Nells (April 2i): The earliest reported activity 
of the warble fly was received from the locality of 
Middle town., 
Texas 
. . SCREWWORM (Chrvsomva maceliaria Fab . ) 
0* G« Babcock (May Id): This insect has been on a gradual 
increase since the beginning of the month. Catches in 
traps show for the last week approximately 50 per c 3nt 
screwworm flies. Very few cases of screwworm have been 
reported to date. The hot weather has apparently tended 
to. increase this species at Sonora and in west Texas. 
L. C. Parman (May 19 ): Cases of screwworms have not 
increased during the month to any extent, but in a few 
instances where cattle have been branded there are a 
good. number of cases. 
F, C* Bishopp (May 23): Screwworm flies are gradually 
increasing in numbers about slaughterhouses, but com- 
paratively few cases of infestation in animals have been 
observed. 
