246 Illinois State Laboratory of Natural History. 



•stunted spine, a long plumose seta, two processes, and a 

 hyaline lamina armed with teeth about as long as the lamina 

 is wide and occupying about a third of the margin slightly 

 below the middle ; 22 and 23 (completely ankylosed), a short 

 seta, a short stunted spine, and a long plumose seta ; 24, two 

 long plumose setre ; and 25 (very short), three long plumose 

 seta- and a sense-club. 



First basal segment of right fifth leg of male not characteris- 

 tic. Second basal segment irregular in form, about two and a 

 half times as long as wide, armed on the anterior aspect, below 

 the inner proximal angle, with a stout sharp spine, and at the 

 middle of the inner margin with a number of exceedingly short 

 hairs or spines. First segment of outer ramus narrower than 

 second basal segment, about one and three fourths times as 

 long as wide ; armed at the outer distal angle with a straight 

 sharp spine serrate on the inner margin. Second segment 

 produced in the form of a long stout sub-sigmoid hook, wid- 

 est some distance below the base and tapering gradually to a 

 rather blunt point ; inner margin of broadest part roughened 

 by a number of irregularly disposed ridges, otherwise both 

 margins perfectly smooth. 



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

 segment subelliptical, more than twice as long as wide, and 

 hairy at the middle of the inner margin. Second segment 

 considerably broader than the first, bulging out at the middle 

 and armed here with a few rather long hairs ; inner apical 

 angle armed with a rather short plumose seta. Third segment 

 subelliptical, more than twice as long as wide ; armed with six 

 stout plumose setre, two apical and two on each of the 

 lateral margins. 



First basal segment of left fifth leg not characteristic. 

 Second basal segment about one and three fourths times as 

 long as wide ; armed at the outer distal angle with a plumose 

 seta, and at the middle of the inner margin with a few very 

 short hairs or spines; produced at the inner apical and 

 proximal angles into smooth hemispherical processes, the 

 lower of which is the larger. First segment of outer ramus 

 subquadrate, about twice as long as wide, produced at the 



