L911] Muttkowski, Wisconsin Dragonflies. 39 



numbers there than at the bluffs of Lower St. Croix lake. Where 

 I saw them they usually flew over the water or along the banks 

 near the trees at places conspicuous through the absence of shore 

 vegetation. Over the water they played with Libellula palchella 

 and luctuosa, at the shore they flew alone.. 



This species, although not seen in large number at any time, 

 is probably very common in that locality. I have a note of having 

 seen two crushed specimens on the day of arrival at Hudson and 

 several more in the course of the week. The strangest is the 

 apparent dearth of females. 

 *Tetragoneiiria canis MacLachlan. 



The correction published on page 169, Vol. 6 of this Bulletin 

 was based on a misdetermination. The male in question is not 

 spiiwsa, but clearly canis. At the time I was not familiar with the 

 form of appendages of canis, which species I did not expect here, 

 and therefore inferred its identity. T. spiiwsa should now be 

 struck from the state list and canis entered in its place. 



LIBEIvLULINyE. 



"Sympetrum semicinctum (Say). 



Chippewa Falls, Chippewa Co., Aug, 21, 1900, three males. 



A new state record. 

 *Sympetrum costiferum (Hagen). 



Sympetrtim sp. Muttkowski, Bull. Wis. N. H. Soc., (2) 6, p. 167; 

 (2) 8, p. 58. 



North Hudson, St. Croix Co., July 6-12, one female. Maiden Rock, 

 Pierce Co., July 27-Aug. 4, one male. 



With three males and one female of this form at hand I cannot 

 doubt their identity any longer, though the species remains an 

 interesting local variation. The unusual number of denticles on 

 the superior appendage of the male is the only feature distinguish- 

 ing the Wisconsin forms from eastern specimens. In the three 

 males thus far captured this number is constant in the main, 

 four appendages having nine denticles, one appendage with eight 

 and the sixth with ten denticles on the inferior surface. Coloration 

 and genitalia render its identity with costiferum certain. 

 Leucorrhinia hudsonica (Selys). 



A female from Milwaukee county was collected by one of the 

 members of the Museum staff. This is a typical case of the in- 



