THE CANADIAN ENTOMOLOGIST 315 



and along the edges of the ditch cat-tail flags and many marsh 

 plants grow. 



While visiting this spot on August 9, 1916, I noticed a small 

 dragonfly caught under the jet of water, and on looking closer I 

 found no less than nine of these insects or their remains 'held 

 down by the force of the cold stream. They were all at or near 

 the surface, most of them more or less entangled in the mat of 

 grass into which the water poured. 



The following species were thus found: Lestes unguiculatus 

 Hagen, Icf, 19 ; Lestes rectangrilaris Say, 2cf, 19 ; Lestes dis- 

 junctus Selys, Icf; Libelliila pulchella Drury, 2(f, Sympetrum 

 sp., fragments. 



The Lestes were all alive and though somewhat benumbed 

 were apparently none the worse for the cold shower. One of the 

 Libellulas was alive but not very active, the other dead and broken. 



On Aug. 12 I visited the spot and found Lestes forcipatus 

 Rambur Icf, 19, both alive; Libellula piilchella, dead; and some 

 indeterminable fragments of Lestes. 



No other insects besides dragonflies were found on either 

 occasion. Other dragonflies which were found at this spot on 

 these dates are the following: 



Lestes uncatus Kirby. 



Ischnura verticalis (Say). 



Ischnura posita (Hagen). 



Nehalennia Irene (Hagen). 



yEshna umhrosa E. M. Walker. 



JE,shna constricta Say. ' 



Libellula quadrimaculata L. 



Libellula lydia Drury. 



Sympetrum obtrusum. (Hagen). 



Sympetrum semicinctum (Say). 



The Libellulas were seen only about the puddle, where L. 

 pulchella and lydia were common. The various species of Lestes 

 were chiefly found along the ditch, but occurred also about the 

 puddle; the other damsel-flies and Sympetrum semicinctum were 

 found only along the ditch. S. obtrusum was generally distributed. 

 The yEshnas were probably stray visitors. 



E. M. Walker. 



