-79- 
V/ashington, 
D. C. 
Illinois 
Louisiana 
.F. 0. Bishopp (April 30): There was a slight increase in the number 
of house flies in this vicinity during April. 
FLEAS ( Ctenocephalus felis louche 
raid Otenocephalus canis Curtis) 
w. ?. Flint (April 18); Judging by the number of letters received, 
these insects have been more abundant than usual at this time of 
the year. All of the specimens received have been the common cat 
and dog fleas. The infestations have apparently originated about 
farm buildings, mainly barns and feed lots. 
CHIGGER (Tr ombidiun irrita ns Hi ley) 
F. C. Bishopp (April 26); A report has been received that chiggers 
are causing annoyance in this vicinity (New Orleans). 
HORSES 
BUFFALO GNAT ( Simu lium pecuarum Riley) 
Mississippi G. H. Bradley and T. E. McNeel (April 24): During the past two 
weeks a destructive outbreak of this insect occurred in Tallahatchee 
County. On this date the number of gnats is greatly reduced, but 
they are still annoying livestock. Approximately 100 head; of 
horses and mules have been killed as a result of the outbreak. No 
death losses of cattle appear to have occurred. 
CATTLE 
- oraska 
North 
Dakota 
Minnesota 
North 
Dakota 
LONG-NOSED OX LOUSE ( Linognathus vituli L.) 
M. H. Swenk (January 1 to April 15): Early in February a Lancaster 
farmer reported a heavy and severe infestation of his calves with 
the long-nosed cattle louse, Lino gnathus vituli L. 
F. C. Bishopp (April 22-24): Infestations of this louse were found 
on calves at Grand Forks (April 22), Fargo (April 25), and at James- 
town (April 24), an exceedingly heavy infestation was observed. 
NORTHERN CATTLE GRUB (Hypoderma bovis DeG. ) 
COMMON CATTLE GRUB (Hy p oderma lincatum DeVill.) 
F. C. Bishopp (April 19-21): Both species were found infesting cat- 
tle at Fairbault, St. Paul, and Duluth. The heaviest infest; t ion 
v s observed at Fairbault where 71 grubs were found in a yearling 
and several animals in this herd were thought to be made unthrifty 
by the parasites. Some grubs (both species) were mature and others 
(H. bovis ) were just reaching the subdermal tissues. 
F. C. Bishopp (April 22-24): I failed to find a single cattle grub 
in native cattle at Grand Forks and Fargo. This shows that these 
