200 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 106 



Eyes: Tvro pairs, often difficuit or impossible to find in this 

 material. Data from two specimens: Diameter of anterior eyes, 

 7 to 10, mean 8.5 ; of posterior eyes, 6 to 7, mean 6.5. 



Dorsal setae: T^vo distinct forms. Setae in the four anterior 

 posthumeral rovrs somewhat similar to the anterior dorsal setae 

 of E. carolhicnsis, but with a very striking disproportion in size 

 bet^veen the t^vo rows of hea\T setulcs and the smaller opposite 

 setules. The flattened, leaflike setae confined mostly to the last 

 posthumeral row. Occasionally a few like the anterior dorsals 

 in the final rov:, or a few flattened setae laterally in the fourth 

 posthumeral row. Length of humerals in six specimens, 54 to 63 ; 

 of setae near the middle of the first posthumeral row, 48 to 55; 

 of setae in the posterior row, 48 to 54. 



Dorsal setal formulae for six specimens : 



Ventral setae: Poststernals generally similar to those of E. 

 caroUnensis. Data from six specimens: Length of first stemals, 

 44 to 57; of second sternals, 44 to 48; of setae near the middle 

 of the first poststernal row, 32 to 42 ; of posterior setae, 40 to 57. 



Material. : Ty-pe, USNM 1997. Specimens from, hosts : 



Pitymys piyietorum scalcpsoides 

 Pennsylvania 



Vrarren County: Sept. 8, 1947, 

 DU-8, Afr-1, Aus-1. 

 New Jersey 



Mount Holly: Oct. 30, 1948, 

 USNM-1, DU-4. 

 Synaptomys cooperi saiuratus 

 Ohio 



Clermont County: Mar. 5, 1948, 

 DU-1; Mar. 20, 1948, CEF-1; 

 Feb. 25, 1949, USNM-type-L2 ; 

 Feb. 27, 1949, RML-2. 

 Pitymys pivetorum auricularis 

 Ohio 



Hamilton County: Mar. 5, 1948, 

 DU-1. 



Clethrionomys g. gapperi 

 Pennsylvania 



Lycoming County: Mar. 30, 1949, 

 USNM-1. DU-2, CEF-1, CM-2. 

 Synapto'inys cooperi stonei 

 Pennsylvania 



Indiana County: Apr. 22, 1949, 

 KU-1. 

 Pitymys sp. 

 Pennsylvania 



Cameron County: Sept. 1, 1949, 

 DU-4, CEF-4. 



