Family Hystrichopsyllidae Tiraboschi 97 



roughly triangular, rounded ventrally, the posterior margin 

 with a number of bristles of various sizes. Manubrium long, 

 distally slender, and in some specimens extending slightly more 

 distad than the penis. Penis broad, ending in a curved point; 

 spring not completing a single turn. Posterior arm of sternite 

 IX wider basally than apically where it is armed with about 

 nine spinelike bristles of various sizes. For further details con- 

 cerning the structure of the male genitalia, see Plate XXVII, 

 fig. 144. 



Female. General structure including chaetotaxy of the head 

 as in the male (Plate XXVII, fig. 139) . Sternite VII divided by 

 a wide sinus into two lobes of which the upper is more 

 acuminate and extends further distad than the rounded lower 

 one. Head of the receptaculum seminis about twice as long as 

 wide. For further details concerning the structure of the female 

 genitalia, see Plate XXVII, fig. 142. 



Records. DISTRICT OF COLUMBIA— February 5, 1930, 

 on Peromyscus leucopus noveboracensis (Fischer) , two males 

 (A. H. Howell). GEORGIA— Lumpkin County, October 21, 

 1935, on "Neotoma floridana" male, two females (F. Harper) . 

 IOWA— Osceola, March 18, 1936, on "field mouse," female (G. 

 S. Cantonwine) ; Ames, March 15, 1938, on "white-footed 

 mouse," male; February 5, 1938, male; December 5, 1937, male; 

 March 3, 1938, male (I. Fox) ; July, 1933, on "thirteen-striped 

 ground squirrel," five females (R. L. Roudabush) ; Luxemburg, 

 November 23, 1937, on Glaucomys volans volans (Linnaeus) , 

 five females; Dubuque, November 2, 1937, on Peromyscus 

 leucopus noveboracensis (Fischer) , male; Dyersville, Novem- 

 ber 4, 1937, on same host, female; Luxemburg, November 23, 

 1937, on same host, female (T. Scott). KENTUCKY— Mam- 

 moth Cave, July 3, 1929, on "Neotoma species," female; Dixon 

 Cave, July 20, 1929, male, three females (L. Giovannoli) . 

 MAINE — Lucerne-in-Maine, November 1, 1928, on Blarina 

 brevicauda talpoides (Gapper) , male (F. Harper) . MARY- 

 LAND— Bell, July 8, 1927, on "starling," female; Bladensburg, 

 March 31, 1901, in nest of "Peromyscus leucopus," male (H. S. 

 Barber) ; College Park, February, 1932, on same host, three 

 males, three females; Takoma Park, April 28, 1932, on same 

 host, male and female (R. Greenfield) . MASSACHUSETTS— 

 Ashburnham, October 12, 1927, on "Evotomys gapperi," female; 

 Muskegeti, June 18, 1926, on Microtus breweri (Baird) , female. 

 NEW HAMPSHIRE— Kinsman's Notch, August 22, 1927, on 

 Peromyscus manicidatus gracilis (LeConte) , male; Carroll 



