274 PROCEEDESrGS OF THE NATIONAL MUSEUM vol. 99 



NEOCHEYLETIELLA ROHWEKI, new species 



Plate 6, Figuke 10 



Female.— Mite with small rostrum; palpal setae long, femur and 

 genual setae serrate; tibial and ventral setae appear simple; palpal 

 claw small ; palpi similar to those of A', heteropalpus. Peritreme com- 

 posed of 11 large segments. Propodosomatic shield rather rudimen- 

 tary, small, longer than wide, and broadest near anterior edge, with 

 a single pair of serrate setae. Anterior to shield is a pair of serrate 

 setae arising from ventral portion of propodosoma; slightly laterad 

 of shield setae is a pair of serrate setae, on posterior corners of propo- 

 dosoma are three pairs of serrate setae ; all propodosomatic setae are 

 of medium length. On anterior portion of hysterosoma are two pairs 

 of medium length lateral serrate setae and a pair of short dorsomedian 

 serrate setae ; on posterior margin of mite are three pairs of very long 

 simple setae which are about twice as long as the other setae, two pairs 

 are dorsal and the inner pair is slightly ventral. All body setae large. 

 Tarsi as in heteropalpus, with a large tubercle on tarsus I and slightly 

 smaller one on tarsus II ; tarsal claw^s large. Length of body 300;u,, 

 including rostrum 367/Ji ; width 233/x. 



Type host. — Sitta pygmaea melanotis. 



Type locality. — Guffey, Colo. 



T'ype.— U.S.N.M. No. 1756. 



A single female was taken at the type locality by C. Kohwer, De- 

 cember 5, 1939. 



This species is differentiated from smallwoodae by the presence of 

 the long, simple posterior setae, in having larger (stronger) body 

 setae, and in having comparatively larger tarsal claws. 



NEOCHEYLETIELLA GHANA YI (Berlese and Trouessart), new combination 



Plate 6, Figxires 11-13 



CheyletieUa chanayi Berlese and Teouessabt, Bull. Bibl. Sci, Quest, vol. 2, 

 p. 135, 1889.— Berlese, Acari, Myriapoda et Scorpiones hucusque In Italia 

 reperta, Prostigmata, fasc. 56, No. 3, 1889. 



Female. — Mite with broad rostrum ; slender but short palpi. Femur 

 of palpi with short simple setae on venter and a long serrate dorsal 

 seta ; genu with a long dorsal serrate seta and a simple lateral seta ; 

 tibia with simple setae of varying lengths as figured; claw small, 

 curved and apparently without teeth. Peritreme composed of long, 

 slender segments. Propodosomal shield small, anterolateral margin 

 with a pair of long outer setae and a pair of short inner setae ; posterior 

 portion of shield with a pair of long and a pair of short setae. Hyster- 

 osoma without shield; two pairs of short simple anterior setae and 

 a pair of posterior dorsal submedian setae, all of which appear to arise 



