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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 106 



Dorsal formulae for five specimens from Orange County, N. C. : 



2 .. 10 .. 10 .. 12 .. 8 .. 4 (type) 



2 .. 10 .. 12 .. 12 .. 7 .. 6 



2 .. 10 .. 10 .. 12 .. 8 .. 4 



2 .. 10 .. 10 .. 11 .. 8 . . 4 



2 .. 10 .. 10 .. 12 .. 6 .. 6 



Ventral setae : Poststernals with numerous sctules of moderate 

 length. The most posterior row of setae about the level of the 

 anus ; continuous with the most posterior row of dorsals ; usually 

 with some flattened setae. Data from five specimens : Number of 

 first sternals, 2; of second sternals, 2; of poststernals, 33 to 40. 

 Length of first sternals, 48 to 54; of second sternals, 38 to 41; 

 of setae near the middle of the first poststernal row, 31 to 37 ; of 

 posterior setae, 41 to 58. 



Material: Type, USNM 1996. Specimens from hosts and 

 unattached; all in North Carolina: 



Pitymys p. jnnctorum 



Orange County: May 9, 1948, 

 CEF-1. 

 Cavities of decayed root systems and 

 under decaying stumps 

 Orange County: Mar. 20, 1949, 

 KU-1; Jan. 22, 1950, CEF-1. 



Per07nyscus leucopus 



Orange County: July 3, 1949, 

 CEF-1. 

 Surface soil 

 Orange County: Jan. 1, 1950,, 

 USNM-Type+2, DU-3, RML-1; 

 Jan. 7, 1950, CM-1. 



Seasonal distribution: Collections of E. carolinensis have 

 been made in winter, spring, and summer. Records are too few 

 to determine if seasonal population peaks occur. 



Geographic distribution: E. carolinensis has been collected ^ 

 only in Orange County, N. C. (fig. 7,c). ^ 



Diagnosis : E. carolinensis can be distinguished from the other 

 members of the "blarinae" group by the flattened, leaflike setae 

 in the three posterior dorsal rows. It is most like E. ohioensis, 

 but there is only one row of flattened dorsal setae in the latter 

 species. 



Ecology : Both host records for E. carolinensis are from mice 

 trapped in the New Hope Creek Division of Duke Forest. The 

 Pitymys was taken in a north-facing ravine in Compartment 6. 

 Beech was represented among the dominant trees. The Peromys- 

 cus was taken among the second growth of a cut-over ridge top 

 in Compartment 11. The unattached chiggers were collected from 

 sites in upland hardwoods in the Durham Division of the forest 

 One was from an east-facing slope, one from a west-facing slope 

 and one from the ridge top. 



