Occasional Papers of the Museum of Zoology 5 



the body. Terminal segment a little more than half as long 

 as broad, triangular, rounded at posterior end. Uropoda with 

 large, flat basal segments ; external ramus inserted in a notch 

 at the inner post-lateral angle ; inner ramus about as long as 

 basal segment, slender, extending one-third its length beyond 

 terminal abdominal segment. 



Type Specimens: Cotypes Cat. Xo. 50865, Museum of Zo- 

 ology, University of ^Michigan; Dunoon, British Guiana; July 

 17, 1914; F. M. Gaige, collector. Taken from wet rotten logs 

 in a clay jungle. 



Other specimens were taken between July 17 and Sep- 

 tember I from rotten logs, aerial rootlets, loose bark of trees, 

 and even from dry sand. 



b ' ml 



Fig. 2. CirconiscHS gaigci. ai, first antenna; a2, second antenna; 

 b, dorsal view of body; mi, first maxilla; 1112, second maxilla; nib, man- 

 dible; nip, maxilliped; p, posterior end of body; «, uropod. 



Leptotrichus emarginatus, new species. 



Description : Body minutely granulated and pubescent ; 

 head tuberculate. Color: head brown with small white mark- 

 ings; thorax white, with four irregular longitudinal brown 

 stripes; abdomen with second and third segments white with 

 .brown band at middle of posterior margin; third, fourth, and 



