MITES OF FAMILY CHEYLETIDAE — BAKER 297 



seta squamiform serrate; dorsal genual setae squamiform serrate, on 

 posterior margin of segment ; ventral seta simple ; lateral seta of femur 

 absent ; palpal claw stout with 2 large teeth, the basal tooth broader 

 and shorter than the distal tooth ; outer comb with approximately 17 

 teeth ; inner comb with approximately 35 teeth. Rostrum of medium 

 size, with a few tubercles. Peritreme composed of six pairs of short, 

 fairly strong segments, Propodosomatic shield wider than long ; four 

 pairs of marginal squamiform serrate setae ; only three pairs of cloud- 

 like dorsal submedian setae discernible, all such setae with convolu- 

 tions. No eyes. Hysterosoma shield with two pairs of marginal 

 squamiform serrate and three pairs of dorsosubmedian cloudlike setae ; 

 shield wider than long, narrowing to rear. All anal-genital setae 

 simple. Leg I about 330/i long; IV, 300/a. Tarsus I, 116/x long; tibia I, 

 57 IX long; no squamiform setae present on tarsus I; dorsally a short 

 rodlike sensory seta ; guard seta simple and about twice as long as sen- 

 sory seta ; ventral seta only slightly serrate ; tibia I with a very short 

 clublike sensory seta and three squamiform serrate setae, as well as a 

 setae base with seta missing. Tibia III with two dorsal squamiform ser- 

 rate setae, and ventrally a similar seta as well as a simple seta. Length 

 of body about 430ju,, including rostrum 585/ji,; width about 328/a. 



Type habitat. — In Neotoma microfus nest. 



Type locality. — Harlingen, Tex. 



Type.—\]. S. N. M. No. 1769. 



The single specimen, the female type, was collected August 22, 

 1945, by Hardy and Wooley. 



This species differs from E. hishoppi in having two instead of six 

 pairs of setae on the margin of the hysterosomal shield, in the num- 

 ber of cloudlike setae, and in having all simple genital-anal setae. 



Genus CHEYLETIA Haller 



Cheyletia Hallek, Arch, fur Naturg., vol. 1, pp. 233, 234, 1884. 



Cheletia Haller, Oudemans, M6m. Soc. Zool. France, vol. 19, p. 126, 1906. 



Type, Cheyletus laureata Haller = J. carws squamosus Degeer (ac- 

 cording to Oudemans, 1897) (monotypic). 



KEY TO THE SPECIES OF CHEYLETIA 



1. Dorsal palpal femoral setae strong, but no more than lanceolate serrate in 



form 2 



Doi'sal palpal femoral setae squamiform 3 



2. Palpal claw with 10-12 teeth ; dorsum of rostrum with tuberculate shield ; 



dorsal body setae squamiform pyriformis (Banks) 



Palpal claw with 9 or 10 teeth ; dorsum of rostrum with few tubercles and a 

 reticulate pattern ; dorsal body setae long and broadly lanceolate. 



virginiensis, new species 



