ART. 30 NEW PARASITIC MITES EWING 13 



Haan and Grijns, 1901. However, Sommatericola is more closely 

 related to the bird-infesting genera Rhinonyssus Trouessart, 1894, 

 and Stetmostomum Berlese, 1889, from which it differs in the absence 

 of the dorsal plate. 



SOMMATERICOLA ORIENTALIS, new species 



Plate 4, Figuue 4 



Body naked, almost twice as long as broad. First segment of 

 palpus very long, as long as the other four segments taken together 

 and largely united to cephalic cone. Cephalic cone reaching to 

 middle of third segments of palpi. Chelicerae stout for the genus; 

 movable chela long, curved; fixed chela not in a position for proper 

 observation. Sternal region without plate; sternal setae six, sub- 

 equal, arranged in two diverging rows. Anal plate small, broadly 

 rounded in front; anus small, situated centrally; anal setae small. 

 Legs stout, almost subequal, the first and last pairs slightly longer 

 than the others. Tarsal claws large, strongly curved, and very 

 sharp. Length of female, 0.75 mm ; width, 0.41: mm. 



Type host. — Lanius nigriceps longicaudatus. 



Type locality. — Bangkok, Siam. 



Type {holotype) s/i(/(?.— U.S.N.M. no. 1079. 



ReTnarks. — Described from a female specimen taken from skin of 

 host, a shrike (U.S.N.M. no. 308292), which was collected at the type 

 locality in 1926. 



Family UROPODIDAE 



CYCLACARUS, new genus 



Nymphal characters as follows : Body a flattened disk with mouth 

 parts concealed from above. Chelicerae chelate, of generalized type. 

 Palpi short, filiform. Stigmata very large and situated in very heav- 

 ily schlerotized peritremes on lateral margins of the body in front 

 of first pair of coxae. Sternal plate occupying sternal area between 

 coxae of last three pairs of legs, with a pair of pores. Anal plate 

 very large, broader than long, with a small anal opening and two 

 pairs of setae. Legs slender, porrect, with large, diverging, subequal, 

 sharp claws; first pair of legs enclosed in camerostome. 



Type species. — Cyclacmnis aherrans, new species. 



Remarks.— The nymphal specimens upon which the type species 

 of this genus is based are exceedingly unusual in having such large 

 stigmata and peritremes and in having the same situated so far for- 

 wa'^xl, in the position of the legs, and finally in the habitat they 

 occupied on the tail feathers of a chimney swift. 



