A SYNONYMICAL NOTE (ODONATA). 

 By Richard A. Muttkowski. 



On page 33 o fthe Bulletin of this Society (Vol. 8, Nos. 1-2) 

 I described what I considered at that time a new species of ihe 

 genus Enallagma, the description being based on two males. 

 Shortly before issuance of the Bulletin I was fortunate in securing 

 29 additional males and 2 females, the latter, contrary to expec- 

 tations, proving the adherence of the species to thd genus Cd'na- 

 grion. There was just sufficient time to add a footnote to that 

 effect on page 34 ( May 29). 



Several weeks later an examination of a series of over 50 

 males and females elicited the disconcerting fact that Coenagrion 

 walkeri was identical with the previously described C. resolution 

 of Hagen. While the figures of the appendages of the type are 

 decidedly different from those figured for C. resolutum on the 

 same page (p. 40, ff, 1, 2 and 8, 9) it was then discovered that 

 the apparent differences are due to a peculiarity of the superior 

 appendages. Namely the latter are retractile to a certain extent, 

 the series showing every degree of retractability ; in the type speci- 

 men of C. walkeri the extreme was achieved which occasioned the 

 subsequent erroneous determination. I take this occasion to an- 

 nounce my error and to correct the synonymy. 



While collecting I was able to make the following observa- 

 tions which I cite from my notes : 



"May 26 : This pretty little species frequents the swampy depres- 

 sions at the northern edge of Johnson's woods. It flies at the imme- 

 diate edge of the water, among Fleur lie Lis and Sagittaria (both 

 plants not then in bloom), usually only about 4 or 5 inches above the 

 water. The species was nowhere profuse in numbers. Usually 3 or 4 

 woidd hunt over a small patch of sunlit grasses and water plants, 

 darting in and out in search of food. Food was plenty as each net 

 stroke would bring forth a cloud of minute flies and midges. I was 

 greatly surprised at the scarcity of females. There was a large num- 



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