Eiving — Neiv North American Acariim. 65 



KEY TO SPECIES. 



1. Body hairless L. magnichela. 

 Body sparsely clothed with simple hairs 2. 



2. Anterior pair of legs very slender, not as broad as the others 



L. mandibular's. 

 Anterior pair of legs about as stout as the rest L. flavus. 



Laelaps niagiiicbela n. sp. 



PL X. f. 20. 



Chestnut brown; body darker than the appendages. 



Palpi one-half as long as the anterior pair of legs; distal segment of 

 palpus very small and short, as broad as long; penultimate segment 

 slightly shorter than the antepenultimate; mandibles when extended 

 equal to the palpi in length. 



Body fully two-thirds as broad as long, somewhat egg-shaped in 

 appearance. Peritreme straight, extending beyond the third pair of 

 legs. Body hairless. 



First pair of legs about as long as the body; tarsus of the first pair 

 about one and a half times as long as the tibia; tibia and antepenulti- 

 mate segment equal in length, but the tibia is somewhat the narrower 

 of the two. Second pair of legs slightly the stoutest; tarsus of leg II 

 one and a half times as long as the tibia; tarsus of leg III shorter 

 than the tarsus of leg II. Tarsi of all the legs sparsely clothed with 

 rather stout hairs. Claws of the tarsi moderate, situated on short 

 pedicels. 



Length, 0.64 mm.; breadth, 0.44 mm. 



In moss. Collected by the writer at Muncie, 111. 

 Described from four specimens. 



Laelaps mandibulari.s n. sp. 



PL X. f. 21. 



Yellowish brown, legs and mouth parts paler. 



Palpi less than one-half as long as the anterior pair of legs; distal 

 segment small, about one-half as broad and one-half as long as the penul- 

 timate segment; antepenultimate segment longer than the penultimate 

 segment. Mandibles when extended twice as long as the palpi and 

 apparently jointed near the middle; chelae equal to the last two segments 

 of the palpus in length. 



Body egg-shaped, broadest at the level of the last pair of legs, sparsely 

 clothed with simple hairs. 



Anterior pair of legs about one and a half times as long as the body; 

 tarsus one and a half times as long as the tibia and well clothed with 

 hairs; tibia and antepenultimate segment subequal; second pair of 

 legs stoutest and subequal to the third pair. Caruncles of the legs stout. 

 All the legs sparsely clothed with hairs. 



Length, 0.52 mm.; breadth, 0.42 mm. 



Habitat unknown. Collected by the writer several years 

 ago at Areola, 111. Described from two specimens, both of 

 which were excellently well preserved. 



