152 Illinois State Lahordtori/ of Xattiral Historij. 



very minutely hairy on the inner margin ; third segment 

 wanting, represented by two short spines, the inner twice as 

 long as the outer. 



Inner ramus of fifth leg of female one-segmented, extend- 

 ing very slightly beyond the first segment of the outer ramus ; 

 apex obtuse, hairy, armed on the inner margin and at the 

 tip with two rather long subequal spines. 



First basal segment of right fifth leg of male (PI. XXIX., 

 Fig. 1) with a small tubercle on the outer margin; second 

 segment subquadrate, about one and a half times as long as 

 the first. First segment of the outer ramus subquadrate, 

 about as long as the first basal segment with overhanging 

 outer apical angle ; second segment slightly narrower than 

 the first, about twice as long as wide, with a small projection 

 at the middle of the inner margin. Marginal spine near the 

 apical angle, slender, with a slight angle about one fourth 

 its length from the base ; length about equal to the distance 

 between its base and the base of the segment. Terminal 

 hook long and slender, longer than the two preceding seg- 

 ments but not as long as those and the second basal segment ; 

 very minutely denticulate on the inner margin. 



Inner ramus of right fifth leg one-segmented, extending to 

 a point about midway between the ba«e of the second seg- 

 ment of the outer ramus and the projection on the inner 

 margin of this segment ; outer margin hairy ; apex bluntly 

 triangular and hairy. 



Second basal segment of left fifth leg of male subquadrate, 

 about one and a half times as long as broad, slightly pro- 

 duced on the inner margin a short distance above the apical 

 angle. First segment of outer ramus slightly narrower than 

 the second basal segment and about twice as long as wide ; 

 outer margin moderately arcuate, the inner margin hairy. 

 Second segment produced into three digitiform processes : 

 the outermost blunt and by far the longest ; the middle one 

 blunt, barely one fourth the length of the outer ; and the last 

 very short, hardly more than a tubercle, with an acute apex 

 pointing straight inward. The segment is armed on the inner 

 margin with a hairy, cushion-like process. 



