254 THE CANADIAN ENTOMOLOGIST. 



and a very dark band from margin of this area to eye below antenna. 

 Clypeus and labrum deep brown. Mouth-parts similar to those of 

 5. triangularis. Thorax with light areas on ventral surface and 

 sides. Legs light brown, unbanded but apical areas of tarsi darker. 

 Dorsal surface of abdomen brown with a pair of blackish streaks 

 about the middle of each segment, a blackish area lateral to each 

 streak and a pair of black dots at the posterior margin of each 

 segment. Ventral surface of the same general colour as dorsal 

 surface with darker markings similarly arranged to those of adult. 

 Setae unbanded. 



The following notes were given me by Mr. Alexander: 



"Sport Island, Sacandaga River. Adults of Siphloniiriis minis 

 Eaton, appeared on June 6, 1909, and were very common on the 

 12th. Seven specimens were taken home alive and three lived 

 51 hours." 



See also under Siphlonisca. 



Nymphs of SipJilonurus femoratus Say, S. hicolor Walker, and 

 S. typicus Eaton have not been taken as yet, and. adults of these 

 species I have not had the opportunity of examining. 



Siphlonisca Needham. 



With more material at hand, including the nymph, the 

 generic characters may be restated as follows: 



Caudal setae two, slightly longer than the body. Claws on 

 all the legs (male and female) hooked and clawlike, and the two of 

 each leg alike. Hind tibia longer than its tarsus, and last segment 

 of tarsus longest. Female fore tibia about same length as its 

 tarsus, last segment of tarsus the longest. Male fore tarsus about 

 3 times the length of its tibia, the last segment of the tarsus the 

 shortest. Median and cubital veins in the fore wing symmetrically 

 forked. No humeral angulation of hind wing. Mesothorax and 

 metathorax each with a prominent midventral spine. Abdomen 

 • with conspicuous lateral expansions of the middle segments. No 

 backward prolongation of 9th abdominal segment in female. 

 Forceps base of -male very broad; forceps 4-jointed and strongly 

 divaricate. 



