1911] May -Flics of Fall Creek, N. Y. 117 



immediately walked to the protected side and downward to the 

 water. First, wrapping her wings about the abdomen, she 

 made several attempts to immerse her head and thorax. This 

 appears to be the critical stage of the performance, for many 

 females are washed from the stone while attempting it. Once 

 beneath the surface she started on a tour of inspection for the 

 proper surface. This tour lasted for several minutes during 

 which time she continually walked to and fro, pausing, feeling 

 with the abdomen, and passing on unsatisfied. When a suit- 

 able place was finally found she braced her legs firmly, bent the 

 abdomen downward, curved the setae upward and pressed 

 the openings of the oviducts closely to the surface. The whole 

 abdomen was then swung from side to side with a slow pendu- 

 lum-like motion, each stroke leaving an irregular row of minute 

 white eggs adhering to the surface. The strokes were at first 

 somewhat circular and longer than those which followed. As the 

 egg mass grew in length the insect moved forward a little to allow 

 the eggs to lie in succeeding rows. When the egg supply was ex- 

 hausted she stopped with a jerk of the abdomen and proceeded 

 to clamber out of the water. When examined in the laboratory 

 the abdomen of this female was found to contain only a few 

 undeveloped eggs in the ovaries and none in the oviducts. 



Ameletus ludens Needham. 

 Occurrence, habitat. In Pleasant Brook on April 25 

 nymphs of Ameletus ludens, were found in great abundance 

 resting upon the bottom or darting about much like the nymphs 

 ■of Callibaetis. They were the dominant insect of the stream 

 at this time. One soft bottomed pool about four feet long, 

 and two wide yielded about 300 nymphs in half an hour's 

 collecting, and many more remained. Full grown nymphs 

 were placed in cages for purposes of rearing. The female sub- 

 imago was found to correspond with Prof. Needham's descrip- 

 tion given in Bull. 86 of the N. Y. State Mus. Attempts were 

 then made to secure a male to add to the life-history since 

 Prof. Needham was unable to procure one. The results of the 

 rearing were as follows: 



April 29, 1 nymph emerged, transformed April 30. Female. 

 April 30, 1 nymph " " May 1. " 



May 7, 1 nymph " " May 8. " 



May 8, 3 emerged nymphs, " April 9. " 



Repeated rearings failed to secure a male specimen. An 

 •enclosure was then made in a neighboring rill by means of boards 



