890 



THE AMERIC. 



\4LIST. [Vol. XXXVI 



long and besides the usual hair on the outer margin 

 it is provided with a characteristic process 

 on its posterior surface. There is a small 

 hyaline projection on the distal margin of 

 this segment and also on that of the first 

 segment of the outer ramus. The first 

 segment of the outer ramus is very short, 

 being one-third as long as the second seg- 

 ment and is produced into a tubercle at its 

 outer distal 



angle, 

 second 



ment has a 

 large tubercle 

 on its poste- 

 rior surface. The marginal spine 

 is strong, but slightly curved, longer 

 than the segment, two-thirds the 

 length of the terminal hook, and is 

 roughened on its inner margin. 

 The terminal hook is strong, arcu- 

 ate and minutely denticulate at the 

 middle of its inner margin. The 

 inner ramus is- one segmented, 

 short, (about as long as the first 

 segment, of the outer ramus) and 

 hairy at the tip. 



In the left male fifth foot (Fig. 

 2) the first basal segment is armed 

 with a tubercle and spine like that 

 of the right. Second basal seg- 

 ment is three-fourths as broad as 

 long and bears the usual hair on 

 Its outer margin. First segment 

 of the outer ramus curved on outer Diapto>nus lehmeri n. sp. Tip 



margin, the inner margin notched °' """" °' 

 and ciliated. The terminal segment is triangular and ends in a 

 blunt process and proximad to this is a slender hair; the 



