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ROCKY MOUNTAIN SPOTTED FEVER TICK ( Dermacehtor andersoni Stiles) 
Nebraska. H. 0.' Schroeder (May):,. Ticks collected from" various -hosts ‘ ■ 
in Fort Robinson included D. andersoni and D. variabilis . (Det. by 
F. C . Bishopp. ) ' 
Utah. Cr. F. Knowlton (June 10): Several Rocky Mountain spotted fever 
ticks collected during June, but less frequently than in May. 
TROPICAL RAT MITE ( Liponyssus bacoti Hirst) - 
Virginia. M. 0. Perrow (June 15): Found in house at Lynchburg on 
June 5, where it was attacking a baby. (Det. by H. E. Ewing.) 
• ■; ; :v. CATTLE 
J SCREWWORM ( Cochliomyia americana C. & P.) 
Georgia. E. E. Rogers (June 21): Since May 29, 23 infestations found 
on animals at Valdosta. 
A. L. Brody (June l4) : Natural infestation in two dogs re- 
ported on Juno 11 and l4 at Valdosta. 
Texas. R. Melvin (May 30): Population building up rapidly at Menard. 
D. C. Parman (May): Flies apparently decreasing in the 
southern Texas Gulf coast region about May 15 . In the area south- 
east of Del Rio flies increased from May lo to ^ 1 . In the vicinity 
of Uvalde no change in population apparent between May l6 and ^ 1 . 
HORN FLY, ( Haematobia . irritans L.) 
Georgia. A. L. Brody and E. E. Rogers (June 21): During the first 
week of Juno at Valdosta animals, infested with about two to three 
hundred. At present the number per animal has decreased to about 
- lOO,. - ■ n ;• ■ „ . ... ... 
Texas. W. G. Bruco (May): Infestations of cattle in the vicinity of 
Fort Worth observed in excess of 3,500 flies per animal. 
. _ , NORTHERN CATTLE GRUB ( Hypodcrma bovis. Deg.) 
Minnesota. A. G. Ruggles and assistants (June 19): Two larvae found 
in cows at Finlayson on May 9 . ■ (Det.' by H. T'. Peters.) 
LONG-NOSED CATTLE LOUSE ( Linognathus vituli L.) 
Nebraska. M. H. Swenk (June 20) : Found infesting calves in Garden 
County on June 6. 
