174 Illinois State Laboratory of Xatural History. 



the receptaculum seminis ; the second segment the shortest ; 

 third segment slightly longer than the second. In the male 

 (PI. XXXIII., Fig. 1) there is little difference in the length 

 of the abdominal segments. Furcal rami broad, but little 

 longer than the third abdominal segment; distinctly hairy 

 within. Furcal setae thick at the base, tapering gradually 

 toward the tip ; distinctly setose. The inner furcal seta is 

 smooth in both sexes. 



Antennae 2 5 -segmented, reaching to or slightly beyond the 

 tips of the furcal setae. The right male antenna with the six 

 segments preceding the geniculation greatly swollen ; ante- 

 penultimate article unarmed; segments 19, 20, and 21, also 

 22 and 23 ankylosed. 



Fifth pair of feet of the female (PL XXXIIL, Fig. 2) of 

 moderate size. First basal segment trapezoidal, the longer 

 base forming the inner margin. Second segment of the outer 

 ramus long, narrow, acuminate, shorter than the preceding 

 segment, perfectly smooth within. Third segment wanting ; 

 represented by two straight and pointed spines, an inner short 

 one and an outer one more than twice as long. 



Inner ramus of fifth foot of female one- segmented, reach- 

 ing almost to the middle of the second segment of the outer 

 ramus; distinctly hairy on inner margin near the apex, where 

 it is armed with two spines, the inner one being fully one 

 third as long as the ramus itself. 



First segment of outer ramus of right fifth foot of male 

 (PL XXXIIL, Fig. 3) subquadrate, slightly longer than broad, 

 the second segment nearly twice as long as the first, its upper 

 half about as wide as the first. A little below the middle of 

 this segment the inner margin is produced into a short spine- 

 like process, concave toward the apex of the segment. Be- 

 tween this and the apex the segment is produced into a 

 narrow, triangular hyaline lamina, tapering from the broad 

 upper part to the inner apical angle. Marginal spine long 

 and curved, concave toward the apex of the segment and 

 inserted very near the outer apical angle. Terminal hook 

 long and very slender, with two sharp angles dividing it 

 approximately into thirds ; upper third rather thick as 



