Vol. XXI Washington, D. C., September i, 1921 No. 11 
SOLENOPOTES CAPIEEATUS, A SUCKING LOUSE OE 
CATTLE NOT HERETOFORE KNOWN IN THE UNITED 
STATES 
By F. C. Bisiiopp, Entomologist, Investigations of Insects Affecting the Health of Animals , 
Bureau of Entomology, United States Department of Agriculture 
INTRODUCTION 
In 1904 Enderlein 1 described a single male sucking louse taken on 
cattle in Leipsic, Germany, as a new genus and species, Solenopoles 
capillatus . Apparently no further reference was made to this insect 
until 1916, when Ferris 2 incidentally mentioned the species, stating that 
he considered the Enderlein type specimen as being immature and con¬ 
cluding that the species was a synonym of Linognathus viluli L. 
In examining the specimens of Anoplura in the collection of the Dallas 
laboratory of the Bureau of Entomology in 1917, H. P. Wood noted 
that some of the material collected on cattle did not appear to be either 
Linognathus vituli L. or Haematopinus eurystcrnus Nitzsche. This led to 
a search of literature for other species recorded from this host, and the 
references mentioned above were found. Upon comparing the material 
in question with Enderlein’s description it was evident that it was 
Solenopotes capillatus. 
Material in the collection at the Dallas laboratory indicates that the 
species has a wide distribution in the United States, and notes upon it 
show that at times it may become a serious cattle pest. Data 011 the 
collections are as follows: 
Bishopp No. 9192, Dallas, Tex., March 20, 1910, many specimens on bull (Bos 
taurus T.) in laboratory yard, F. C. Bishopp, collector; Bishopp No. 2681, Viewpoint, 
Oreg., March 8, 1913, heavy infestation of range cattle ( B . taurus ), H. H. Hatch, col¬ 
lector; No. 4292, Riverside, Md., February 14, 1915, on calves, F. C. Bishopp, col¬ 
lector; No. 7485, Dallas, Tex., November 13, 1917, many specimens on cow in labo¬ 
ratory yard, H. P. Wood, collector; No. 8487, Olympia, Wash., December 28, 1918, 
on Jersey bull, R. W. Wells, collector; No. 8500, Uvalde, Tex., January 10, 1919, 
on calf, D. C. Parman, collector; No. 8995, Bennington, Vt., March 17, 1919, on cow, 
R. W. Wells, collector; No. 9699, Herkimer, N. Y., March 20, 1920, on calf, F. C. 
Bishopp, collector. 
1 Enderlein, Gunther. lausE-studien .. In Zool. Auz., Bd. 28, No. 4, p. 144, fig. 14-15. 1904. 
* Ferris, G. E. cErvophthirius crassicornis. (n.) (anopi,ura). In Ent. News, v. 27, no. 5, 
p. 197-200. 1916. 
Journal of Agricultural Research, 
Washington, D. C. 
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Vol. XXI, No. 11 
Sept. 1,1921 
Key No. K-101 
(797) 
