ART. 8 CHIGGER MITES OF THE NEW WORLD EWINQ 17 



plate indistinct, slightly sclerotized along anterior margin; median 

 seta shortest, simple; antero-lateral setae longest. Posterior eyes 

 smaller than anterior, both pairs with corneas ; posterior eye situated 

 its diameter from anterior eye. Pseudostigmata situated their diam- 

 eter apart; pseudostigmatic organs setiform, simple, very short. 

 Dorsal abdominal setae small, short, inconspicuous, less than 30 in 

 number. Legs short; tarsus I with dorsal spine situated two-thirds 

 its length from the base of the segment, but very long, extending to 

 base of tarsal pedicel; subterminal seta moderate, somewhat spine- 

 like, not situated on a tubercle. 



Length of engorged larva, 0.4G mm.; width, 0.28 mm. 



Type host. — A frog {Arthrole-ptis minutus). 



Type locality. — Mount Sagalla, Kenya Colonj^, Africa. 



Type slide.— U.S.'^.M. No. 1026. 



Many specimens received through Nathan Banks. Specimens taken 

 from hosts collected by E. Heller in the year 1911 and determined 

 by A. Loveridge. Stained sections of frog's skin show that the mites 

 live in cavities under the growing layer of integumentary cells. 



HANNEMANIA HIRSUTA. new .species 



Plate 3, Figures 3, 5 



Palpi large, stout, rounded laterally; first seta with many barbs 

 arranged on a single side, second seta simple, third with one barb. 

 Palpal thumb small, short, extending only to the base of palpal claw. 

 Palpal claw bifurcate, inner prong being much stouter and consid- 

 erably longer than outer. Chelicerae not strongly curved, without 

 dorsal teeth, but each with a row of laterally projecting ventral 

 teeth, the teeth in this row diminishing in size from apex to base of 

 segment. Dorsal plate strongly incurved along front margin and 

 outwardly rounded behind, being subangulate at median line; sub- 

 median setae about equal to antero-lateral ones but shorter than pos- 

 tero-lateral setae. Pseudostigmata slightly nearer each other than 

 either is to the postero-lateral seta on its own side, situated along a 

 line drawn between the postero-lateral setae; approximate to each 

 pseudostigmata, both in front and behind, is a curved slit. Pseudo- 

 stigmatic organs very long, somewhat flagelliform, and simple. An- 

 terior and posterior eyes equally developed, contiguous, and both 

 pairs provided with corneas. Dorsal abdominal setae very numerous, 

 being more than 100. Legs moderate in size; tarsus I with a short 

 dorsal spine situated over twice its length from base of segment, sub- 

 apical seta extending to about the base of tarsal claws, not situated 

 on a tubercle. 



Length of partly engorged larva, 0.37 nnn. ; width, 0.25 mm. 



