CHIGGERS — FARRELL 173 



Legs : Form of legs and form and distribution of all setae as in 

 E. diversa diversa. 



Anomalies: Distal tibiala I on one leg of a single specimen 

 replaced by a microtibiala. The tibiala III lacking on one leg of 

 a single specimen. 



Scutum: With the characters of the group and similar to E. 

 diversa diversa with the tendency to squareness at the postero- 

 lateral corners somewhat more pronounced. 



Standard data of the type specimen from Warren County, Pa. : 



Summary of standard data, including the type, of ten speci- 

 mens, five from each of Clearfield and Warren Counties, Pa. 

 (AM's from nine specimens, S's from four) : 



AW 55-67, mean 59.6, PW 63-73, mean 68.8, AP 17-22, mean 19.1, 

 SB 16-23, mean 20.1, ASB 31-36, mean 32.9, PSB 8-11, mean 9.9, 

 AL 52-72, mean 61.7, AM 27-38, mean 33.4, PL 57-69, mean 62.4, 

 S 28-32, mean 30.3. 



Eyes : Two pairs. Anterior pair lateral to posterolateral setae. 

 Diameter of anterior eyes of eight specimens, 10 to 13, mean 12 ; 

 of posterior eyes, 10 to 13, mean 12.2. 



Dorsal setae: Form, number, and arrangement similar to E. 

 diversa diversa. Length of humeral setae of ten specimens, 54 to 

 62 ; of setae near the middle of the first posthumeral row, 50 to 55 ; 

 of posterior setae, 38 to 47. 



Dorsal formulae for five specimens from each geographic 

 region : 

 Clearfield County, Pa.: 



Warren County, Pa. : 2 . . 12 . . 13 . . 12 . . 10 . . 8 . . 2 . . (Type) 



Ventral setae: Form, number, and arrangement similar to E. 

 diversa diversa. Data from 10 specimens: Number of first ster- 

 nals, 2 ; of second sternals, 2 ; of poststernals, 44 -f to 72. Length 

 of first sternals, 47 to 58; of second sternals, 33 to 40; of setae 

 near the middle of the first poststernal row, 27 to 33 ; of posterior 

 setae, 38 to 45. 



Material: Type, USNM 1994. Specimens from hosts, all from 

 Pennsylvania : 



