CHIGGERS — FARRELL 165 



In life, posterolateral setae project posteriorly at a slight angle 

 to the body; anterolaterals project posterolaterally at a slight 

 angle, converging medially; anteromedian seta projects almost 

 perpendicularly from the scutum, giving it an anterior inclination 

 caused by the somewhat anterior exposure of the scutum. 



Anomalies : In each of two specimens a posterolateral seta to- 

 gether with its setal base was lacking. 



Standard data of the type specimen from Orange County, N. C. : 



AW PW AP SB ASB PSB AL AM PL S 

 48 62 19 17 35 10 63 37 61 30 



Summary of standard data of 16 specimens, including the type, 

 from Orange, Durham, and Wake Counties, N. C. (AL's from 15 

 specimens, AM's from 15 specimens, S's from 6 specimens) : 



AW 42-54, mean 48.5; PW 58-66, mean 61.9; AP 17-23, mean 20.5; 

 SB 11-20, mean 15.8; ASB 29-38, mean 33.8; PSB 10-14, mean 11.9; 

 AL 50-63, mean 59.9; AM 29-38, mean 33.9; PL 52-65, mean 59.3; 

 S 25-30, mean 25.8. 



Eyes : Two pairs. Anterior eyes lateral to posterolateral setae, 

 distance varying v/ith engorgement. Anterior and posterior eyes 

 almost contiguous in unengorged specimens, becoming separated 

 with engorgement. Diameter of anterior eyes of 14 specimens, 

 11 to 13, mean 12.4; of posterior eyes 10 to 13, mean 11.6. 



Anomaly : In one specimen no posterior eyes were apparent ; on 

 one side there were apparently two eyes transversely arranged. 



Dorsal setae: Numerous setae in six posthumeral rows plus 

 a few irregular posteriors. Longitudinal portion of seta opposite 

 body densely covered with fine setules of moderate length ; portion 

 adjacent to body tends to be nude. Posterior setae terminate 

 bluntly or with V-clefts, perhaps with fewer setules than the an- 

 teriors but of the same form. Length of humerals of 13 specimens, 

 54 to 61 ; of setae from the middle of the first posthumeral row, 

 50 to 55 ; of setae from the posterior group, 32 to 38. 



Dorsal setal formulae of 10 specimens from North Carolina: 



4 (type) 



Data from 13 specimens: Number of first sternals, 2; of second 



