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dairies around Dallas. After the cold wave of April 6 to 10, the 
population was reduced at least 50 percent and prooaDly 75 percent. 
Since this cold spell, the population. has again increased but ap- 
parently has not yet reached the abundance that occurred just be- 
fore the cold weather mentioned above. The horn fly passed the 
winter in Dallas in the pupal stage, as evidenced by the emergence 
of flies after March 30, from material kept in hibernating cages. 
0. G. Babcock (April 22): The infestation in the vicinity 
of Sonora is from light to medium, that is, from 25 to 500 P°r animal, 
HORSE 
BLACK HOBSJFLIBg ( Tabanue spp») 
Texas. E. W. Lnakc (April 25); The first specioen of T. atratus F. • 
i»ae observed on an animal on April IS at the laboratory at Dallas. 
Another specimen was observed feeding on a sheep on April 21. A 
specimen of another species, apparently T. lineola T u was caught in 
the cattle-fly trap en April 20. " Throe individuals of this species 
were taken in the cattle-fly trap operated on the laboratory 
premises during the week ending April 25. 
A BUFFALO GNAT ( Simulium vittatum Zett. ) 
Nebraska. LI. H. Swenk (April): On March 2k a Clay County correspon- 
dent sent in specimens of the black fly with the statement that 
this fly was a very serious pest of horses, entering their ears 
and irritating the membranes. This pest was first noticed on this 
farm by the correspondent 3 or ^ years ago. A similar complaint 
was received from Thurston County on April l6. 
WINTER TICK ( Dcrmaccntor alb ip ictus Pack.) 
Oregon. H. E. Stage (April 5): Range horses were moderately infested 
with these ticks near John Day. No D. a ndersoni were seen at 
this time. (Bet. by J. M. Brennan.) 
POULTRY ' 
EUROPEAN CHICKEN FLEA ( Ceratophyllus gallinae Schr.) 
New York. R. I.latheson (March 30): C. gallinae was reported at Gasport 
in northwestern New York, for the first time. 
STICKTIGHT FLEA ( Schidnophaga gallinacea Westw. ) 
Alabama. J. M. Robinson (April l6) : The chicken flea was reported 
from Lanctt on April l6. 
