418 BULLETIN f>4, UNITED STATES NATIONAL MUSEUM. 



the end obtusely rounded. Width of segment at base about one and 

 one-half times its length. 



The caudal stylets are long and slender, the length of the stylet 

 being equal to the length of the caudal segment. The basal joint is 

 equal to the length of the fifth peduncular joint of the antenna?. The 

 outer branch is half as long as the inner branch. 



The first pair of legs are subchelate. The propodus is broadly 

 expanded and armed on the inner margin with a large tooth about 

 halfway between the base and the articulation of the joint with the 

 dactylus. Between the tooth and the articulation of the dactylus with 



the propodus is a proc- 

 ess having a blunt, trun- 

 cate extremity. The 

 dactylus is provided 

 with two teeth near the 

 base on the inner mar- 

 gin. The carpus is small 

 and triangular in shape. 

 The merus is produced 

 at the upper outer angle. 



FIG. 469. MANCASELLUS DANIKLSI. 

 MANDIBLE. 



FIG. 470. MASCASELH-S 

 DANIEISI. MAXILLIPED. 



(GREATLY EXLARCKIi. i 



The remaining six pairs of legs are similar in 

 structure and ambulatory in character, with bi- 

 unguiculate dactyli. 



Three specimens w r ere found at Lily Lake, La- 

 porte, Indiana, by Mr. Daniels. 



Type. Cut. No. 25693, U.S.N.M. 



This species is more closely related to M. tenax 

 (Smith) than to any other species of the genus. 

 It differs, however, from M. tenax in the greater 

 length of the antenna?, which extend nearly the 

 entire length of the body, while in M. tena<c the} T 

 are only half the length of the body; in the 

 greater width of the caudal segment in proportion to its length, 

 the width being one and one-half times the length, while in J/. 

 tenax the width and length of this segment are about equal; in the 

 greater length of the caudal stylets, which are equal to the length of 

 the caudal segment, while in M. ti'/m.i- they are only a little longer 

 than half the length of the caudal segment; in the greater length of 

 the basal segment of the stylet, its length being equal to the length 

 of the fifth joint of the peduncle of the antenna 1 , while in M. tena.i- it 

 is equal to the length of the fourth joint of that organ (the fourth 

 joint of the peduncle of the antenna 1 in both species being shorter than 

 the fifth joint); in the greater breadth of the entire body in proportion 

 to its length, M. tenaa- being narrower in width as compared to its 

 length; and in the difference in the legs of the first pair, the propodus 



