"2i)"2 Illinois State Laboratory of Natural History. 



Left fifth leg of male uniramose, three-segmented. Firsl 

 s< gment subquadrate, produced on the inner margin into a 

 long, broad, strongly curved hook-like process about twice as 

 long as the main part of the segment and armed at the tip 

 with a broad blunt spine; provided at the outer apical angle 

 with a rather stout hair or spine. Second segment about as 

 long as the first but much narrower; margins parallel, the 

 inner margin concave ; usually unarmed but sometimes pro- 

 vided at the outer apical angle with a minute sharp spine. 

 Third segment irregularly triangular in form and about one 

 and a half times as long as the second, somewhat produced 

 at the inner proximal angle ; armed at the tip with a short 

 broad spine, on the outer margin with three spines, dividing 

 it approximately into thirds, and on the inner margin with a 

 close row of long delicate hairs. 



Eight fifth leg uniramose, two-segmented. First segment 

 irregular in form, the outer margin almost straight, the inner 

 produced on the lower half into a large lamella or rlat 

 process* ; usual seta at the outer apical angle wanting. The 

 second segment consists of a broader basal and a narrower 

 terminal part which is always rlexed inward and upward;.* 

 inner margin slightly produced at the tip. 



Fifth leg of female uniramose, three-segmented. First 

 segment barrel-shaped, armed at the outer apical angle with 

 a delicate spine. Second segment about half as wide as the 

 first and about three times as long as wide : armed at the 

 outer distal angle with a minute spine. Third segment 

 slightly narrower than the second and about one and a half 

 times as long; armed on the outer margin with three spine> 

 (the upper two smooth, the lower one spinulose) ; on the 

 apical margin with three spines (the outer two spinulose on 

 their opposed margins and the inner one on both), and on th- 

 inner margin with one spine, spinulose on the inner margin. 



Length of female 1.784 mm. ; that of male 1.370 mm. 



The above description was prepared from type specimens, 

 from Dr. Forbes's slides, from specimens taken in the same 



*In one or twn specimens I thought I saw indications of several teeth, similar to 

 those in E. nevadensis, but could not fully satisfy myself of their presence. 



