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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL, 106 



sternals, 2 ; of poststernals, 75 to 93. Length of first sternals, 53 

 to 61 ; of second sternals, 35 to 40 ; of setae near the middle of the 

 first poststernal row, 28 to 33; of setae in the posterior group, 

 32 to 41. 



Anomaly : Three setae in the second row of sternals on a single 

 specimen. 



Material: Type, USNM 1991. Specimens from hosts and 

 unattached, all from North Carolina: 



Peromyscus nuttalli 



Wake County: Feb. 1948, DU-1; 

 Mar. 1948, DU-3. 

 Under old stump 



Orange County: Dec. 1948, DU-1. 

 Sylvilagus floridanus mallurus 



Orange County: Feb. 1949, CEF-2. 

 Base of hollow tree 

 Orange County: Mar. 1949, 

 USNM-1. 

 Under decaying stumps 



Orange County: Mar. 1949, DU-1; 

 Jan. 1950, USNM-Type +1, 

 DU-3. 

 Soil (19 to 30 cm, depth?) 



Orange County: Jan. 1950, 

 USNM-4. 



Peromysciis leiicopus 



Orange County: Dec. 1947, DU-3; 

 Jan. 1948, DU-4; Mar. 1948, 

 DU-1; Apr. 1948, DU-3; Dec. 



1948, DU-3; Jan. 1949, DU-6, 

 Afr-1, Aus-1, CEF-10; Feb. 



1949, DU-10, CEF-7; Mar. 1949, 

 DU-12; Apr. 1949, DU-1; May 

 1949, DU-1. 



Durham County: Dec. 1947, DU-1; 



Jan. 1948, DU-2; Feb. 1948, 



DU-5; Dec. 1948, DU-18, RML-5, 



CM-3, KU-3; Jan. 1949, DU-8; 



Feb. 1949, DU-3; Mar. 1949, 



USNM-2, DU-3; Apr. 1949, 



DU-4. 

 Wake County: Feb. 1948, DU-6. 

 Surface soil 



Durham County: Feb. 1948, DU-1; 



Apr. 1948, USNM-1. 



Seasonal distribution : All collections of E. rubra were made 

 during the months of December through May (fig. 6,d) . Dates of 

 first and last collections of each season : 



Season First collection Last collection 



1947-1948 Dec. 25, 1947 Apr. 25, 1948 



1948-1949 Dec. 12, 1948 May 1, 1949 



1949-1950 Jan. 7, 1950 _ _ _ 



Geographic distribution: Euschdngastia rubra has been col- 

 lected only in Durham, Orange, and Wake Counties, N. C. (fig. 

 4,6). 



Diagnosis: Euschdngastia rubra can be distinguished from 

 the other species of its group by the strongly branched lateral 

 seta on the palpal tibia, by the different shape of its scutum with 

 its smaller size and stronger ridges and depressions, and by its 

 more southern range. 



Ecology : In the Duke Forest area the ecology of E. rubra ap- 

 pears to be similar to that of E. peromyscL Both species of 

 chiggers commonly occurred on the same host specimens. How- 



