Family Dolichopsyllidae Baker 75 



with two stout bristles, between which is a much weaker bristle, 

 and one or two others near the apex. Manubrium reaching to 

 about two-thirds the length of the penis, terminating more or 

 less bluntly. Penis bladelike, ending in a curved process; spring 

 very long and completing several turns. For further details 

 concerning the structure of the male genitalia, see Plate XX, 

 figs. 100, 102. 



Female. Chaetotaxy of the head differing somewhat from 

 that of the male (Plate XX, fig. 103). Three antepygidial 

 bristles present on a side, of which the uppermost is much 

 shorter than the other two. Sternite VII without a sinus, its 

 posterior margin irregularly rounded or slanting. Head of the 

 receptaculum seminis globular; tail about one and one-half 

 times as long as the head. For further details concerning the 

 structure of the female genitalia, see Plate XX, fig. 104. 



Records. FLORIDA — Jacksonville, January 25, 1934, on 

 Rattus norvegicus (Erxleben) , female. IOWA — Osceola, July 

 7, 1934, on same host, female (G. S. Cantonwine) ; Des Moines, 

 June, 1937, male, seven females (R. L. Roudabush) . ILLINOIS 

 — Champaign, June 14, 1938, on "house-rat," male, three fe- 

 males (W. P. Mohr). MARYLAND— Baltimore, on Rattus 

 norvegicus (Erxleben) , six females; Dorchester County, June 

 5, 1933, on "rat," male, two females (F. R. Smith); Takoma 

 Park, on same host, September 18, 1938, female (H. E. Ewing) . 

 MASSACHUSETTS — Vineyard Haven, June 11, 1936, on 

 Rattus norvegicus (Erxleben) , female (C. N. Smith) ; West 

 Barnstable, May 10, 1913, host unknown, female (W. F. Jen- 

 kins) ; Edgartown, October 15, 1937, on "Norway rat," female; 

 November-December. 1937, four females (C. N. Smith) . OHIO 

 — Lancaster, November 26, 1935, on "brown rat," female; May 

 30, 1935, on same host, female (R. Goslin) . PENNSYLVANIA 

 — Philadelphia, November 14, 1932, on "rat," male and female 

 (C. Fox) . RHODE ISLAND— Providence, November 27, 1912, 

 on "rats," male and female (S. H. Robinson) . 



Eastern hosts. House-rat (Rattus norvegicus (Erxleben) ) ; 

 "Mink," Wood-rat ("Neotoma Pennsylvania"), White-footed 

 Mouse ("Peromyscus leucopus") , Weasel (Mustela novebora- 

 censis noveboracensis (Emmons) ) . 



Eastern localities. District of Columbia, Florida, Georgia, 

 Iowa, Illinois, Kentucky, Louisiana, Maryland, Massachusetts, 

 New York, Ohio, Pennsylvania, Rhode Island, Wisconsin, 

 Virginia. 



