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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 106 



Ventral setae : Form of poststernal setae similar to that of the 

 dorsals. Data from 90 specimens: Number of first sternals, 2; 

 of second sternals, 2 ; of poststernals, 49 to 75. Poststernals in a 

 cotype of E. signator, 75. Length of first sternals, 36 to 49; of 

 second sternals, 25 to 43; of setae near the middle of the first 

 poststernal row, 19 to 29; of setae in the posterior group, 25 to 36. 



Anomalies: Four specimens with three second sternals. One 

 specimen with one rudimentary first sternal bearing two tiny 

 setules. 



Material: Type material of E. peromysci, E. signator, and 

 E. brevipes in the U. S. National Museum ; all other specimens in 

 the Duke University collection. From hosts and unattached : 



Peromyscus leucopus noveboracensis 

 Massachusetts 

 Sturbridge: May 27, 1928, 1 

 (Holotype). 

 Pennsylvania 



Beaver County: May 1947, 6. 

 Mercer County: July 1947, 1. 

 Venango County: Feb. 1948, 4; 



Mar. 1948, 3. 

 Clearfield County: Apr. 1949, 4. 



Wood rat 

 Oklahoma 



Wilburton: Mar. 17, 1949, 2 

 (Cotypes E. signator). 



Peromyscus leucopus 

 Maryland 



College Park: May 3, 1929, 4 

 (Cotypes E. brevipes). 

 Pennsylvania 



Monroe County: July 1947, 1. 

 North Carolina 



Durham County: Jan. 1948, 3 

 May 1948, 9; June 1948, 3 

 Sept. 1948, 1; Dec. 1948, 47 

 Jan. 1949, 8; Feb. 1949, 13 

 Mar. 1949, 6; Apr. 1949, 15 

 June 1949, 8; Sept. 1949, 4. 



Orange County: Dec. 1948, 3 

 May 1948, 3; July 1948, 1 

 Nov. 1948, 9; Dec. 1948, 3 

 Jan. 1949, 17; Feb. 1949, 21 

 Mar. 1949, 27; Apr. 1949, 10 

 May 1949, 5; June 1949, 8 

 July 1949, 16; Aug. 1949, 2. 



Clethrionomys gapperi 

 Pennsylvania 



Wayne County: July 1945, 3. 

 Monroe County: July 1947, 8. 

 Pike County: July 1947, 1. 

 Sullivan County: Oct. 1949, 29. 

 Clethrionomys gapperi paludicola 

 Pennsylvania 



Venango County: Apr. 1947, 64; 

 May 1947, 64; Feb. 1948, 15; 

 Mar. 1948, 87. 

 Westmoreland County: Feb. 1948, 



7. 

 Jefferson County: Apr. 1948, 8; 

 May 1948, 33. 

 Sorex f. fumeus 

 Pennsylvania 



Venango County: Apr. 1947, 2. 

 Microtus p. pcnnsylvanicus 

 Pennsylvania 



Venango County: Apr. 1947, 13. 

 Lycoming County: Jan. 1949, 11. 

 Clearfield County: Apr. 1949, 9. 

 Blarina b. brevicauda 

 Pennsylvania 



Venango County: May 1947, 1. 

 Clearfield County: May 1949, 1. 

 Tamias striatus 

 Pennsylvania 



Monroe County: July 1947, 1. 

 Pike County: July 1947, 2. 

 Peromyscus maniculatus 

 Pennsylvania 



Pike County: July 1947, 1. 



