THE CANADIAN ENTOMOLOGIST 253 



space, a few cells reddish. Femora with median and apical bands; 

 tibia-tarsal and tarsal joints black; fifth tarsus and ungues dark. 



Female imago. 



Measurements: Body, 11 mm.; wing, 12; setae, 22; abdomen 

 more yellowish than male. 



Nymph. 



Measurements: Body, 10 mm.; setae, 13-16 mm. Head, light 

 brown in colour and dotted with light dots; light areas over ocelli; 

 another at posterior margin of head in median line and a larger ofie 

 lateral to each eye. Pronotum with a broad, colourless lateral 

 margin; remainder light brown, with numerous irregular light 

 spots. Abdomen darker dorsally and with a rather complicated 

 colour pattern. First segment light, with two brown areas at side; 

 second with a narrow browm band along posterior margin and five 

 brown areas and four light ones placed alternately; third almost 

 entirely dark, with a few light dots; fourth with two dark spots in 

 posterior lateral angles of segment, also a large dark area in centre 

 of segment with a light area within it; fifth with a dark spot in each 

 posterior lateral angle as in preceding segment, a dark band along 

 posterior margin, two light areas surrounded with brown and a 

 dark spot in centre of each ; sixth almost entirely brown except for 

 two light areas in anterior lateral angles; seventh with two large 

 light areas, with a brown dot in each toward inner side; eighth an 

 irregularly light and dark coloured segment; ninth has a narrow 

 brown band along posterior margin and a dark longitudinal stripe 

 in median line; tenth almost entirely dark. Ventrally, the lateral 

 and posterior margins of segments 2-8 dark ; segment nine with two 

 large brown spots. Setae greenish ; basal half well fringed at joints, 

 distal half with each two segments alternately light and dark and 

 few hairs at joinings. Femora with alternately light and dark ir- 

 regular bands and covered with minute spines dorsally; posterior 

 margins fringed with hairs, anterior margins also fringed, but hairs 

 shorter. Proximal ends of tibia? dark and have dark bands slightly 

 beyond middle. Tarsi with reddish-brown bands very near proxi- 

 mal ends. Claws with two pectinations. 



These nymphs were very abundant along the open shore of 

 Station Island and west of it, my collection dating from June 3 to 

 July 2. A few were taken in a rapid on the Muskosh River on June 



