THE HOP FLEA-BEETLE. 73 



ventral segment sinuate each side, while the middle of the disk near 

 the apex has a semioval depression." 



The species was first described in 1847.^ '' 



DISTRIBUTION". 



The hop floa-beotle is a native American species, quite distinct from 

 any sjDecies found on hops in England or on the Continent. 



The collection of the U. S. National Museum and the published 

 records and specimens before the writer show the species to be gen- 

 erally distributed in the northern United States and southern Canada, 

 from the Atlantic to the Pacific. It does not appear to occur south 

 of Nebraska. The list of known localities follows : Cambridge, Mass. ; 

 Dundee, Ithaca, Long Ishind, Staten Island, and Xcav York, X. Y. ; 

 New Jersey, generally distributed (Smith) ; Pittsburg, Pa.; Marshall 

 Hall and Cabin John, Md. ; I'iarquette, Detroit, Grand Ledge, and 

 Byron, Mich.; University, N. Dak.; Lincoln and Omaha, Nebr. ; Fair- 

 field, AVyo. ; Denver, Longmont, Grand Junction, Delta, Montrose, 

 Paonia, and Ft. Collins, Colo.; Logan, Garland, Lehi, Salt Lake, and 

 Park CitA', Utah ; Elko, Nev. ; Blackfoot, Idaho ; San Francisco, Mar- 

 tinez, Monterey, Huntington Beach, Pasadena, and Chico, Cal. ; 

 Tenino, "Wash. ; Astoria and Marion, Oreg. ; Agassiz, Sardis, and 

 Vancouver, British Columbia ; Northwest Territory ; Manitoba ; and 

 "Assiniboia" (now Saskatchewan). 



RECENT INJURIES. 



Septemlx^r 10, 1903, the late Dr. James Fletcher first reported this 

 species injuring hops in British Columbia. 



During 190G Mr. Theo. P'der wrote from San Francisco, Cal., under 

 date of April 9, that hop growers were troubled considerably in some 

 sections by " hop fleas," or flea-beetles. May 29, specimens were 

 received from Perkins, near Sacramento, Cal., which proved to be 

 the species under consideration. August 13, Mr. Hugh F. Fox, New 

 York, N. Y., sent si^ecimens and transmitted a report from Mr. Geo. 

 Heggie, manager of a large hopyard, the Stepney ranch, owned by 

 Sir Arthur Stepne}', at Enderby, B. C., where this pest was very 

 injurious. Mr. Heggie wrote as follows: 



We have hoeu sorely troubled this year in our hopyard with the " hop flea- 

 beetle," which attacks the young vine and leaf as soon as they appear above 

 the ground, and eats out large holes in the leaf, resulting in the plant being 



" In the very closely related Ps. convenor Lee. the last ventral segment of the 

 male is convex and not impressed. The latter species is, moreover, larger, 

 broader, and more convex, and the elytral strhe are not impressed. 



^ The numbers in superior type refer to corresponding numbers in the ap- 

 pended bibliography, p. 91. 



