126 MARINE AND FISHERIES 



5 GEORGE v., A. 1915 



than fore tibiae; fore tarsus only slightly longer than hind tibiae; fore claw rather 

 short, broad and bifid at tip; hind claws about twice length of the fore and very 

 pointed. 



Imagos were captured on the following dates; May 23, May 26 and June 12th. 

 On the latter date a swarm or 12 or 15 individuals was observed flying off the west 

 shore of Island Station from 12 to 20 feet from the surface of the water at 5.30 

 p.m. About 8 of these were taken. 



Baetis propinquus Walsh. 



The imago is described in Eaton, but my specimens do not show the subopaque 

 area between the 2 nervures of the hind wing. 



Nymph: 



Measurements: Body 6 mm.; setse 2. 



Face vertical, mostly brown in colour; on dorsal sm'face of head on each 

 side of median line is a row of irregularly shaped light spots. Notum brown with 

 various light areas. Dorsum of abdomen for the most part brown; segments 

 2-4 brown with a light area in each half of segment and colourless margins; on seg- 

 ment 4 there is also a light area in median line; segment 5 quite light in colour; 

 segment 6 brown with a light area along anterior margin and 2 faint ones posterior 

 to it; segments 7 and 8, each with two rather large pale areas in posterior half; 

 segment 9 almost entirely pale; segment 10 slightly brown, especially along 

 posterior margin; on each side of the brown segments there are 2 small faint, 

 pale, oblique, slightly curved streaks and a pale dot posterior to each. Ventrally 

 the joinings of segments brown. Setse slightly tinged with brown, with tips 

 darker brown and a brown band beyond the middle; lateral setse fringed on 

 inner sides only. Legs pale; femora banded with brown about middle; tibise 

 and tarsi darker toward distal ends; each claw with a lateral row of pectinations. 



Nymphs of this species were taken at Go Home Bay from June 14 to July 22; 

 on August 19 large numbers of them were discovered in a little bay of a small 

 bare island about three miles out in the open. This rock was the home of numerous 

 gulls and hence is commonly called "Rookery Island." The nymphs were mature 

 and imagos emerged on August 21 and 22 



Cloeon dubium Walsh. 



The imagos I have agree with the description in Eaton, except that the inter- 

 calar veins are single, not in pairs. Probably the description is in error as the genus 

 Cloeon typically has the intercalar veins single. 



Nymph: 



Measurements: Body 4-4-5 mm.; setse 1-5. 



Face vertical with 2 large pale areas above antennse; between eyes a large 

 pale area partly divided into 2 and containing 2 brown stripes. Notum brown 



