^76 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 106 



way they add to the total picture and make possible more rapid 

 progress. 



The "rubra" group is unique in the genus for variability in a 

 relatively small geographic area. Further collections, particularly 

 from the region of Union County, Pa., and the areas between the 

 known geographic ranges, are needed to define the systematics 

 of the species more sharply. Also, with so variable a group it is 

 probable that other related forms will be discovered in areas not 

 yet investigated. 



13. Euschongastia guntheri (Radford) 



Figure 7,6; Plates 6, 15 



Neoschdngastia guntheri Eadford, 1942, pp. 76, 77, fig. 101; 1947a, pp. 596- 



598, figs. 23, 24; 1947b, p. 275. 

 Euschongastia guntheri, Brennan, 1948, vol. 34, p. 473.— Fuller, 1952, pp. 



182, 183. 



Description: Size: Length of the single specimen studied, 

 400; width, 335. 



Shape : Broad oval. 



Gnathosoma: Long curving seta on palpal femur with sparse, 

 rather long setules alternately arranged. Seta on palpal genu 

 shorter, curved, with a few long setules in rows on its outer curva- 

 ture. Dorsal seta on the palpal tibia long, arching, with a row of 

 setules; lateral seta thin with two fine setules. Palpal claw long 

 and smooth; three prongs, median prong longest. Galeal setae 

 with four and seven long setules, respectivel5\ Cheliceral base 

 heavy, longer than broad ; blade strong, curved ; subapical dorsal 

 and ventral teeth distinct. Palpal coxa and femur and base of 

 chelicera punctate. 



Legs : Leg I with two genualae and a microgenuala, two tibialae 

 and a microtibiala, a typical spur, a microspur, a subterminala, a 

 parasubterminala, and a pretarsala; all striated setae rather 

 short. Leg II with a single genuala, two tibialae, a spur with 

 proximal microspur, and a pretarsala; spur long, the others 

 rather short. Leg III with one rather small genuala; no tibiala. 

 Nonspecialized setae on leg I rather long on proximal segments 

 beyond the trochanter, shorter distally, with numerous short 

 curving setules on the surfaces opposite the leg. On leg II, dor- 

 sally particularly, setae tend to have fewer, straighter setules. 

 Both sorts of nonspecialized setae on leg III. Two setae on coxa 

 III. Leg segments stout. Claws on tarsi I and II small in propor- 

 tion to the size of the tarsi. All leg segments with punctae. 



Anomaly : One coxa I with two setae. 



Scutum : Twice as broad as long. Pointed at the posterolateral 

 comers. Anterior margin approximately straight with antero- 



