114 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 106 



All five species of Euschongastia that were collected from hosts 

 in tlie Duke Forest area were recovered also in the unattached 

 and unengorged condition from one or more of these samples. 

 E. ])ero7nysci occurred in twenty samples; E. rubra, in ten; E. 

 blarinae, in four; E. carolinensis, in four; and E. setosa, in one. 

 The number of chiggers recovered from a positive sample usually 

 was small — from one to three specimens. However, a few samples 

 collected under decayed stumps produced a great many E. pero- 

 mysci. Other species were never numerous. Most productive 

 samples were taken under old stumps and in holes left by decayed 

 roots (pi. 2), and in the runways of mammals. No collection of 

 Euschongastia was made from standing living or dead trees; 

 none was made from fallen trees or branches unless decay was 

 well advanced and a hollow formed; and none was made from 

 fields (pi. 3, upper). All positive samples were from forest soil 

 or from sources in intimate contact with it. 



Three collections of white trombiculid adults, a total of seven 

 specimens, wei-e made from material gathered under the remov- 

 able stump at the type locality of E. rubra (pi. 2, upper right). 

 These probably were Euschongastia, but confirmation of this 

 could not be made. 



Phylum ARTHROPODA 



Subphylum CHELICERATA 



Class ARACHNIDA 



Order ACARINA 



Suborder TROMBIDIFORMES 



Group PROSTIGMATA 



Family Trombiculidae Ewing, 1944 



Subfamily Trombiculinae Ewing, 1929 



Genus Euschongastia Ewing, 1938 



Figure 8,6 



Schdngasiia Oudemans [part], 1910, pp. 86, 87 (fide Sig Thor and Willmann, 



1947, p. 297). 

 NeoscJwnf/astia Ewing [part], 1929d, pp. 22, 28, 188. 

 Euschovgast'.a Ewing, 1938, p. 293. 

 Euschongastia, Vitzthum, 1942, p. 829 (treated as a subgenus of Schongastia 



Oudemans, 1910). 

 Ascoschongastia Ewing [part], 1946b, p. 71. 

 Boshellia Ewing, 1950, pp. 294-295, 296. 



