64 Trans. Acad. Sci. of St. Louis. 



Macroclieles clavisetosus n. sp, 



PI. IX. f. 17-18. 



Light yellovv'ish brown; integument granular. 



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

 less than the penultimate segment in length and bearing a tuft of hairs 

 on its distal end; antepenultimate segment slightly longer than the 

 penultimate; the second segment has its inner margin concave. Mandi- 

 bles broader than the palpi ; chelae almost equal to the last two segments 

 in length; hypostoma in the form of two long spurs, extending forward 

 about one-half the length of the palpi. 



Body about tv/o-thirds as broad as long; markedly compressed in front 

 of the second pair of legs and very broadly rounded behind. Dorsally 

 the body is very sparsely clothed with rather stout spatulate hairs. 



Anterior pair of legs longer than the body; tarsus and tibia of leg I 

 subequal; tibia longer than the antepenultimate segment. Leg II 

 enlarged, about three times as wide as leg I. The tarsi of the three 

 last pairs of legs show segmentations near the base. Claws and caruncles 

 stout. All the legs sparsely clothed with two kinds of hairs; near their 

 bases the clavate hairs predominate while toward the distal ends only 

 simple, pointed setaj are found. 



Length, 0.90 mm.; breadth, 0.58 mm. 



Quite common under logs and in trash. I have speci- 

 mens from Galesburg, Areola and Urbana, 111. 



Macroclieles miiscorum n. sp. 



PL IX. f. 19. 



Very light brown; chela? of mandibles dark brown. 



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

 than the penultimate segment; antepenultimate segment longer than the 

 penultimate. Mandibles when extended equal to the palpi; chelae as 

 long as the last three segments of the palpus. Hypostoma in the form 

 of two long harpoons and over one-half as long as the mandibles. 



Body two-thirds as broad as long, rounded behind, truncate in front, 

 slightly compressed at the level of the second pair of legs and very 

 sparsely clothed with slightly curved hairs; hairs longer toward the 

 posterior margin. 



Anterior pair of legs as long as the body; distal segment one and a 

 half times as long as the penultimate segment and well provided with 

 hairs; penultimate and antepenultimate segments subequal; second pair 

 of legs twice as stout as the first pair; third pair of legs the shortest 

 pair; last pair of legs next to the longest. The last three pairs of legs 

 possess stout caruncles. 



Length, 0.46 mm.; breadth, 0.30 mm. 



In moss. Collected by L. M. Smith at Parker, 111. 

 Laelaps Koch. 



Peritreme present, more than twice as long as broad; leg I with 

 claws; dorsal shield entire; male genital opening on the anterior margin 

 of the sternal plate, male with leg II unarmed. 



Three species. 



