402 



THE CANADIAN ENTOMOLOGIST. 



Museum, Bull. 79, Enl. 22, p. 344, 1904, in 6'. 5a/////r/>/rt, Osten Sacken). 

 Row of pecten scales reach from the base of tube up to level of tufted 

 hairs. Upper scales overlap one another. Comb of eighth segment, an 

 irregular row of eight to nine simple curved spines springing from a 

 chitinous plate. Chitinous collar completely encircling ninth segment. 

 Dorsal and ventral tufts of hairs spring from oval chitinous plates attached 

 to collar by narrow isthmuses (similar plates are figured by Felt in U. 

 sapj)/nri?ia, Osten Sacken). Anal papillae long, slender, divergent. 



Pupa. — Thorax and abdomen with scattered tufted hairs. vSiphons 

 subcylindrical, about eight times as long as broadj bases deeply chitinized. 

 Fins acuminate, mid-rib not projecting beyond border. Borders deeply 

 serrated ; two halves of fins very unequal. 



Fig. 24. — Uranota;nia Socialis, n. sp., Tlieo. 



