14 PEOCEEDINGS OF THE NATIONAL MUSEUM ^^t^Io 



CYCLACARUS ABEKRANS, new species 



Plate 4, Figltres 5, 6 



Body a large, flat disk provided with only a few minute setae. 

 Epistome a fine, delicate, feathery process. Palpi short, simple, 

 without processes or tubercles. Chelicerae very long, arising in pos- 

 terior i^art of the body; chelae short; movable one curved and of a 

 shape usual to the family; fixed one with two toothlike processes at 

 the tip. Sternal plate large, twice as long as broad, occupying most 

 of the sternal area and possessing a pair of pores situated a little 

 behind the middle. Anal plate very large, angulate in front, broadly 

 rounded behind, studded with the openings of integumentary pores, 

 bearing a conspicuous pair of posterior, submarginal setae, and occu- 

 pying most of the ventral surface of the abdomen. Metapodal plates 

 very large, extending forward to in front of the third pair of coxae, 

 thicldy studded with pore openings. Peritremes exceedingly large 

 and sclerotized and extending hackwcvrd from each spiracle. Spir- 

 acles situated on lateral margins of body far forward, even in front 

 of mouth parts. Legs slender ; first pair smaller than the others and 

 situated in the same opening as the mouth parts ; tarsal claws long, 

 curved, divergent, and very sharp. Length of nymph, 1.49 mm; 

 width, 1.33 mm. 



T 1/2)6 host. — Ghaetura pelagica. 



Tffe locality. — West Chester, Pa. 



Ti/pe {holotype) sZ/6?e.— U.S.N.M. no. 1080. 



Remccrhs. — Described from four nymphs taken as follows : One 

 (holotype) from tail feather of type host, a chimney swift, collected 

 at the type locality by D. Smiley, May 22, 1930 (Bishopp no. 18529) ; 

 and three nymphs collected from the same host at the type locality 

 by the same collector, ISIay 4, 1930 (Bishopp no. 13905). This mite 

 is not only remarkable for the situation in which it was taken (on 

 the tail feathers of a swift), but its morphology is unusual in certain 

 respects, particularly in the nature and position of the peritremes 

 and in the presence of so many and such conspicuous integumentary 

 pores. 



U.S. GOVERNMENT PRINTINS OFFICE: 193) 



