2G8 
North Dakota. J. A. Munro (June 18): Snowball aphids are abundant in 
Fargo and vicinity. 
Nebraska. M. H. Swenk (June 15): The snowball aphid wag reported attack- 
ing snowball bushes during the period May 20 to June 15. 
INSECTS ATTACKING MAN AND 
DOMESTIC ANIMALS 
MAN 
BLACK WIDOW SPIDER ( Latrodectus mactans Fab. ) 
South Carolina. F. Sherman and W. C. Nettles (June 21): Specimens have 
been received from various localities. 
Mississippi. C. Lyle (June 22): On account of much newspaper publicity 
great interest has been shown in the black widow spider and dozens of 
letters regarding it have been received. 
Utah. G. F. Knowlton (June 17): Reports of black widow spiders in abun- 
dance have been received from Washington County. 
Oregon. D. C. Mote (June): One female was collected on February 15; 
oviposition, March 17, 20» 23; egg hatching, May If, 27, ancl June 3 
at Corvallis. Laboratory observations, 
AMERICAN DOG TICK ( Dermacentor variabilis Say) 
Wisconsin. E. L. Chambers (June 20): Wood tides apparently much more 
abundant in the woods of the State thah for several summers. Crews 
of workmen in the white pine stands report considerable annoyance from 
them. 
PAJAROELLO ( Ornithodoros coriaceus Koch) 
California. C. S. Robinson (July 5): This species of tick is causing con- 
siderable annoyance and discomfort to campers and field men in the 
Santa Barbara National Forest. These ticks are commonly found under 
trees and places where horses and cattle congregate, and people should 
avoid sleeping or resting in such places. 
CATTLE 
SCREW WORMS ( Cochliomyia spp. ) 
General. F. C. Bishopp (July 5): The heavy rains and the resulting humid- 
ity in certain sections of western Texas during June have created very 
favorable conditions for the breeding of an enormous number of screw 
\7orm flies. Reports fro:. 1 , field stations in this area state that ranchmen 
