MITES OF FAMILY CHEYLETIDAE — BAKER 279 



CHEYLETUS HENDERSONI, new species 



Plate 7, Figures 17-19 



Female. — Femur of palpus li/^ times as long as wide ; genual setae 

 located on posterior margin of segment ; palpal claw with 3 basal teeth, 

 but 1 specimen with 4 basal teeth on 1 side ; outer comb about one-third 

 longer than inner, with about 17 teeth and inner comb with about 24 

 teeth. Rostrum simple, widening posteriorly. Anterior shield large, 

 covering propodosoma, with four pairs of pilose marginal setae. 

 Posterior shield large and covering most of hysterosoma, narrowing 

 toward rear, with two pairs of marginal setae. Tarsus I, 83/x long; 

 tibia I, 50/x long ; tarsus with a short rodlike sensory seta and a longer 

 simple guard seta ; short rodlike set on tibia I. Length of body 313/x, 

 including rostrum 446ju, ; width 190/^. 



Type habitat. — On "mummy.-' 



Type locality. — Arkansas Cave, Ark. 



Type.—V. S'. N. M. No. 1757. 



Female type and three paratypes (two in poor condition) collected 

 on a "mummy" by W. C. Henderson, letter of July 16, 1935. 



This mite is similar to Cheyletus erud'dus (Schrank) but differs 

 in the number of palpal claw teeth, peritreme, dorsal shields, and in 

 the arrangement of the setae on tarsus I. 



CHEYLETUS DODDI, new species 



Plate 7, Figukes 20-22 



Female. — Palpal femur Xy^ times as long as wide; femoral and 

 genual setae long, pilose ; genual seta located on posterior margin of 

 segment ; palpal claw with 3 basal teeth, the 2 posterior teeth appear 

 to be a bifurcation of a single large tooth ; palpal combs of about equal 

 length and both with about 15 teeth. Rostrum simple, widening 

 toward rear ; peritreme composed of small segments. Anterior shield 

 large, covering most of propodosoma, rounded anteriorly and convex 

 posteriorly, with four pairs of long, simple, pilose marginal setae. 

 Hysterosomal shield with rounded corners, narrowing posteriorly, 

 and with two pairs of marginal setae. Tarsus 1, 113/* long ; tibia 1, 73/^ 

 long ; tarsus I with a rodlike sensor^'- organ of medium length ; guard 

 seta simple, about half as long as sensory organ; tibia with a short 

 rodlike sensory seta and several long simple setae. Leg I about 335/i 

 long. Length of body 386/x, including rostrum 500/^; width 233/x. 



Type habitat. — In "feed." 



Type locality. — Ithaca, N. Y. 



Type.—\].^:^M. No. 1758. 



The female type and three paratypes were collected by C. R. Crosby 

 (letter of September 28, 1922) in feed at Cornell University, Ithaca, 



