No. 26.] 



ARTHROSTRACA OF CONNECTICUT. 



201 



FiQ. 59- Ptilanthura tenuis. 



First antennse in the female shorter than second pair with a 

 very short flagellum consisting of a small basal segment and a 

 minute terminal one tipped with a few sets; first joint of 

 peduncle long; second and third subequal and slightly longer 

 than first. In the male first pair of antennas as long as head and 

 first two segments of thorax together ; first segment large but not 

 longer than second, which is also longer than the third; flagellum 

 with first joint one-third as long as second joint of peduncle, 



