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-l)oetle is a native American species, quite distinct from 

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



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

 records and si^ecimens 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 Island, Staten Island, and New York, N. Y. ; 

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

 Hall and Cabin John, Md. ; 2Iarquette, Detroit, Grand Ledge, and 

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

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

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

 Park City, 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 Territorj^; Manitoba; and 

 " Assiniboia " (now Saskatchewan). 



RECENT INJURIES. 



Septeml^er 16, 1903, the late Dr. James Fletcher first reported this 

 species injuring hops in British Columbia. 



During 190G Mr, Theo. Eder wrote from San Francisco, Cal., under 

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

 sections by " hop fleas," or flea-beetle.s. ^lay 29, specimens were 

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

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

 York, N. Y., sent specimens and transmitted a report from ^Ir. Geo. 

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

 Sir Arthur Stepney, at Enderby, B. C, where this pest was very 

 injurious. Mr. FCeggie wrote as follows: 



We have beeu sorely troubled tills year iu our bopyard with tbe " bop flea- 

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

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



« In tbe very closely related Ps. convcxior Lee. tbe last ventral segment of tbe 

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

 broader, and more convex, and tbe elytral strite are not inii)resseil. 



^ Tbe numbers in superior type refer to corresponding numbers iu tbe ap- 

 pendetl bibliography, p. 91. 

 66 — VI 



