CHIGGERS — FARRELL 133 



of five specimens, 44 to 48 ; of setae in the first posthumeral row, 

 34 to 40 ; and of setae in the posterior group, 38 to 45. 



Dorsal formulae for five specimens collected at University of 

 Oklahoma : 



Ventral setae: Sternals with fine setules. Setae between 

 sternals and anus small with fine setules. At level of the anus, 

 setae abruptly become large, and similar to dorsals. Data for 

 five specimens: Number of first sternals, 2; of second sternals, 

 2; of post sternals, 39 to 48. Length of first sternals, all 44; of 

 second sternals, 29 to 36; of setae in the first post sternal row, 

 23 to 27 ; of setae in the posterior group, 38 to 45. 



Materiel: Type, USNM 1990. Specimens from host: 



Scalopus sp. 



University of Oklahoma, Sept. 13, 1933 (USNM, type + 2; DU, 4; RML, 

 2; CEF, 2; KU, 1). 



Diagnosis: Euschdngastia trigenuala is the only species with 

 the following combination of characters : A nude seta on the pal- 

 pal genu, feathered dorsal and ventral setae on the palpal tibia, 

 and microspur I proximal to spur. The scutum and the sensillae 

 also are distinctive. 



Remarks: The data given under "material" includes all that 

 is known about the collection. 



E. trigenuala is named for the three genualae on genu I. 



5. Euschdngastia pipistrelli Brennan 



Figure 4,c; Plates 6, 11 



Euschdngastia pipistrelli Brennan, 1947, pp. 249-251, figs. 3a-d. — Fuller, 



1952, pp. 182, 184. 

 Euschdngastia miricoxa Brennan, 1948, pp. 465, 468-469, 477, figs. 8A-E, 10. 



Description : Size : Length, 287 to 780 ; width, 185 to 520. 



Shape: Ovoid. 



Color : Opaque white. 



Gnathosoma: Seta on palpal femur with few, spaced setules. 

 Seta on genu variable, with one to four setules, or nude. Dorsal 

 seta on tibia with two to four setules ; lateral seta nude or with 

 one or two tiny setules; ventral seta rather small with setules; 

 palpal claw with five prongs, occasionally four prongs, median 

 longest and strongest, two slightly shorter, and two more proxi- 



