56 Bulletin Wisconsin Natural History Society. [Vol. 8, No. 1. 



the vulvar lamina. These agree closely with Needham's figure in the 

 Canadian Entomologist, vol. 31/ pp. 233-238, 1899; pi. 5, ff. 8, 17, 26, 35. 

 Hagen's description refers to the nymph alone, although he had the 

 adults ; of the latter no description has been published. It is therefore 

 impossible to verify this determination by comparison with a descrip- 

 tion. The possibility that the form of the vulvar scale was changed 

 by compression I do not concede in this case, as the specimen is in 

 perfect condition and shows no indication of pressure at any point 

 of its anatomy. Further, the vulvars of four females of 0. rupinsulensis, 

 with which I have compared this specimen, exhibit no tendency towards 

 variability. 



This record is all the more surprising as the species has thus far 

 been recorded from North Carolina alone. 

 Gomphus quadricolor Walsh. 



Cement Mills, Milwaukee River, Milwaukee Co., July 15, 1909 ; 1 



female. 

 Gomphus fraternus Say. 



Chippewa Fails, Chippewa Co., May 26, 1900 ; 2 females ; May 30, 



1 male ; June 30, 2 females. 



* Gomphus ventricosus Walsh. 



Yellow River, Burnett Co., July 28-31, 1909 ; 1 female. 

 The first specimen of this species taken in the state. 

 Gomphus spicatus Hagen. 



Yellow River, Burnett Co., July 28-31, 1909; 6 males, 3 females. 



* Gomphus spiniceps Walsh. 



Yellow River, Burnett Co., July 28-31, 1909; 1 male. 

 Mr. Williamson of Bluffton, Ind., determined this and the following 

 species, notatus. 



* Gomphus notatus Rambur. 



Yellow River, Burnett Co., July 28-31, 1909 ; 1 female. 



* Boyeria vinosa Say. 



St. Croix Dam, Douglas Co., July 17-22, 1909 ; lmale. 



* Aeshna eremita Scudder. 



St. Croix Dam, Douglas Co., July 17-22, 1909 ; 1 male. 



Chippewa Falls, Chippewa Co., July 18, 1899; 1 male; Howieson 



Collection. 



In the male from Chippewa Falls the thorax and abdomen have 



been opened, without injury to the genitalia, the contents removed, and 



the cavities filled with absorbent cotton. As a result all the natural 



