116 Trans. Acad. Sci. of St. Louis. 



domen dorsally clothed with rather short bristles, some of the larger 

 of which are slightly clubbed and pectinate; shoulder bristles moderate 

 and of the same kind as the larger abdominal bristles. Sternum subrec- 

 tangular, extending from the front margins of coxae II to between 

 coxae III, posterior margin concave. Female genital plate triangular, 

 apex reaching beyond the posterior margins of coxae III and base situ- 

 ated far behind the posterior coxae. 



Anterior and posterior legs much longer than the other two pairs. 

 Tarsus of leg I, one and a half times as long as tibia and well clothed 

 with simple setae; tibia twice as long as broad and longer than the 

 patella, which is slightly curved. Posterior legs extending for more 

 than half their length beyond the posterior margin of the abdomen, 

 tarsus very long and tapering with an indicated segmentation near its 

 base, tibia slightly over one-half as long as the tarsus. 



Length, 0.54 mm.; breadth, 0.24 mm. 



In trash. Described from a single female which came 

 through from India alive and in good condition. She was 

 very active. 



Ukopodidae. 



ukopoda Latreille. 



Sculptures present on the ventral surface for the reception of the 

 legs; legs of the first pair with claws; dorsal surface of the body 

 sometimes with pits, but never sculptured, its margin unbroken. 



Two species. 



TJropoda discus n. sp. 



Reddish brown; integument more strongly chitinized around the 

 margins of the body, and in the region of the sternum and the coxae 

 of the legs. 



Body longer than broad with the front margin somewhat flattened 

 and the hind margin rather narrowly rounded; with a few minute hairs 

 on the dorsal surface. Upper plate of the exoskeleton extending down 

 somewhat on the ventral surface at the sides in order to join the 

 ventral plate. 



Posterior part of the sternum of the male thickened and containing 

 the circular genital opening which is situated immediately between 

 the posterior coxae. In front of this posterior thickened area the 

 sternum is roughly rectangular but between the second and third 

 coxae a lateral angle is produced. Epigynium of female almost two- 

 thirds as broad as long, extending from between the second coxae to 

 behind the posterior margin of the fourth coxae. It is evenly rounded 

 in front and slightly truncate behind. Anus very small and situated 

 at the posterior margin of the abdomen. 



Tarsus of leg I twice as ,long as tibia, clothed with many straight 

 bristles, and ending in a rather long pedicel with minute claws; tibia 



