240 Illinois State Laboratory of Natural History. 



seta and a sense-hair; 4, a short seta and a short spine; 5 

 and 7, a long seta, a short one, and a sense-hair; 6, a short 

 stunted spine; 8, a short broad seta, a short curved spine, 

 and a sense-hair; 9, a long broad seta and a sense-hair; 

 11, a short broad seta and a sense-hair; 12, a sense-club, a 

 short curved spine, and a short broad seta; 18, a short broad 

 seta and a sense-club; 14, a long seta and a short broad 

 seta; 15, a sense-club and two short broad seta?; 16, a long 

 seta, a sense-club, and a short broad seta; 17, a sense-club, 

 and abroad, pointed, knife-like process; 18, along sense- 

 club, and a hyaline lamella armed with teeth and extending 

 almost the entire length of the segment; 19, 20, and 21 

 (ankylosed, the suture between 19 and 20 obscurely indi- 

 cated), a blunt digitiform process at the inner apical angle, 

 a seta, a blunt stunted spine slightly below the middle, and a 

 stunted spine and a knife-like process still lower down ; 22 

 and 23, (ankylosed, suture indistinct), two seta? and a sense- 

 hair; 24 two seta?; and 25 (very short), four seta' and a 

 sense-club. 



First basal segment of right fifth leg of male subquadrate. 

 Second basal segment about as "wide as the first and about 

 twice as long, provided at the outer apical angle with an in- 

 conspicuous hyaline process. First segment of outer ramus 

 considerably narrower than the second basal segment, less 

 than twice as long as wide; armed at the outer apical angle 

 with a stout spine, serrate on the inner margin, and on the 

 inner margin below the middle with a hyaline process. Sec- 

 aond segment slightly narrower than the first ; produced at 

 the inner apical angle into a hook-like process, which i^ 

 armed on the outer margin, near the base, with two sharp 

 slender spines, and provided on both margins with a hyaline 

 lamina having an appearance of transverse st nation. The 

 hook is fully three times as long as the segment itself. 



Inner ramus of right iifth leg three-segmented, the first 

 segment irregular in form, about twice as long as wide; 

 armed on almost the entire outer ma ruin with a few tine 

 hairs, and at the beginning of the distal third with a slender 

 plumose seta. Second segment somewhat wider than the 



