1911] M ttttkowski, Wisconsin Drai/onflies. 37 



Needham's description 4 was made from a single, somewhat 

 faded male. Through the courtesy of Mr. Charles Schaeffer, I 

 was recently enabled to examine a male in the collection of the 

 Brooklyn Institute Museum, which shows some marked differ- 

 ences from Needham's type. The Brooklyn male is fully matured 

 and in good coloration, except for segments 4-9 of the abdomen 

 which are deplorably discolored. 



Following are the chief differences, or additions : 



1. Ground color olivaceous green, as found in Ophiogomphus. 



2. Prothorax with a double median spot of yellow on the 

 dorsum, and a larger yellow spot each side, this spot probably a 

 continuation of the yellow area of the anterior legs. 



3. Thorax olivaceous green, sides more distinctly green in 

 the region beneath the wing bases ; no indication of dorsal stripes 

 beside the carina, except in very strong light, in which case a very 

 delicate and fine line seems faintly penciled on each side. 



4. Antehumeral of brown present and of usual type, I mm. 

 wide. Humeral suture with a brown line, .5 mm. wide, reaching 

 from the base of fore wing to anterior coxa. 



5. Antecubitals of fore wings: left 13, right 12; of hind 

 wings : left 9, right 9. Postcubitals 8-9 on all wings. 



6. The anal segments seem capable of considerable distension, 

 as segment 8 is 4 mm. high and 2.5 mm. wide, whereas 6 is only 

 1.7 mm. high and wide. 



7. Length 54 mm., abdomen 39.5 mm., hind wing 31 mm., 

 which in each case exceeds the measurements given by Needham. 



The appendages agree very well with Needham's description. 

 A single male in the Brooklyn Museum, locality unknown. 

 Gomphus cavillaris Needham. (Plate IV. fig-s.. 10, 11, 12 and 13). 



Turkey Lake, Florida, March 28, 1908, male and female. 



A figure of the appendages and genitalia of the male is here 

 given. The vulvar scale of the female is slightly overdrawn, as 

 its true length is hardly one-tenth of segment nine. 



^SCHNIN^E. 

 Aeschna canadensis Walker. 



Prescott, Pierce Co., July 13-19, one female. 



Caught in the woods above the Pine Coulee where the expe- 

 dition camped. 



4) Can. Ent., Vol. 34, p. 275, 1902. 



