pp. 
Mr. Wesley G. Bruce, of the field laboratory at Fargo, N. Dak., 
reports that during the month of June the horn fly made its appearance in 
the vicinity of Fargo and that it was not uncommon to see four or five 
hundred on one animal. Whether or not the color of the animal has any— 
thing to do with the presence or absence of horn flies, it seems quite 
evident to him that a black animal is more heavily infested than a white 
one. 
Mr. Bruce also reports a heavy infestation of lice on cattle in 
the vicinity of McClusky, N. Dak. 
A survey through the Red River Valley and north to Lac du Bonnet, 
Canada, reveals the presence of cattle grubs in greater numbers in the 
valley and in Manitoba, Canada. From Park River, Gilby, and Milton, 
N. Dak., and throughout the Red River Valley, come reports of increased 
infestation. 
In the vicinity of Fargo mosquitoes were noticeably inactive up 
until about the middle of June but since that time have appeared in 
large numbers, causing considerable annoyance to man. 
During the latter half of June the stable fly has caused consid— 
erable annoyance to livestock in North Dakota, especially at Fargo, 
Grand Forks, and Park River. . 
D. C. Parman reports that during the month of June adults of 
Coshliomyia macellaria Fab. were abundant in the vicinity of Uvalde, Tex. 
Screw-—worm cases were common but apparently no more than normal for this 
time of year. The trapping test for blowflies, begun early in the summer, 
has been continued at the Uvalde laboratory. 
The systematic operation of 270 flytraps located on an area of 
approximately 175 sections of ranch land in Menard County, Tex., which 
was begun early in the summer, is being continued. 
Reports by H. H. Stage of mosquito investigations at the Portland, 
Oreg., field laboratory state that larvae of Aedes vexans Meig. and A. 
aldrichi Dyar & Knab were abundant in the Portland district wherever flood 
waters of the rivers extended. Early in June A. vexans became annoying 
to a greater or lesser extent over the entire peninsula and Hayden Is— 
land. It is thought that this influx had probably come from a proli- 
fic breeding area from 7 to 10 miles down the river in Clark County, 
Wash. These two species are also reported to be very numerous at Wah— 
keena Falls. In the Klamath Falls, Oreg., district Aedes dorsalis Meig., 
Culex tarsalis Coq., Culiseta- inornatus Will., and one undetermined species 
of Aedes were taken. Occasional specimens of Anopheles quadrimaculatus 
Say were seen, but of the mosquito population perhaps 80 per cent were 
A. dorsalis. At Lakeview, in the Chewaucan Valley, Oreg., Aedes flaves— 
cens Muill., Aedes dorsalis, Culex tarsalis, and Culiseta incidens Thoms. 
were numerous, with A. flavescens making perhaps 85 per cent of the popu- 
Peron: In the south Warner Valley the only species taken was Aedes 
flavescens and it was not as abundant as usual because of lack of irriga— 
tion water. 
