Lake Maxinkuckee, Physical and Biological Survey 15 



7. LEUCORHINIA INTACTA (Hagen) 



This is the species commonly known as "whiteface," the desig- 

 nation expressing the chief pecuHarity, a white face sometimes 

 tinged with yellow but always contrasting strongly with the sur- 

 rounding dark color. It frequents the marshy flats around the 

 lake, flying close to the water among the stems of the water plants, 

 so that it requires some search to find one and more maneuvering to 

 capture it. The eggs are laid close to the shore and the only fe- 

 male seen ovipositing was perched on a rush stem with the poste- 

 rior half of its abdomen beneath the water. The nymphs are 

 large with an ovate abdomen, the dorsal hooks of which are as long 

 as the segments which bear them. Found in Lake Maxinkuckee 

 and Lost Lake. 



8. SYMPETRUM VICINUM (Hagen) 



This is an autumnal species, not appearing until late in. the sum- 

 mer, and is one of the smallest found. It resembles the following 

 species closely in size and body color, and the two can be distin- 

 guished only by the shape and size of the hamulse and abdominal 

 appendages of the male, and by the structure of the vulvar lamina 

 in the female. It flies about as much over the shore as it does 

 over the water, and like the following species has a habit of hover- 

 ing in the air, holding itself stationary by the rapid vibration of 

 its wings. 



It was found in considerable numbers in Hawk's marsh and 

 along the Tippecanoe River, and was the last species to be seen 

 after frost came. 



9. SYMPETRUM CORRUPTUM (Hagen) 



Very similar to the preceding in coloration, especially after the 

 original markings have disappeared and the body has become a 

 dark red. It is considerably larger than vicinum, is a more rapid 

 flier, and rather more wary; and for these reasons very difficult 

 to capture. 



Only a few specimens obtained from Yellow River late in 

 August. 



10. ERYTHEMIS SIMPLICICOLLIS (Say) 



This species has a wide distribution and is especially common 

 around the swamps and marshes and along shore. Hawk's marsh, 

 the southern inlet, and Green's marsh between Lost Lake and Lake 

 Maxinkuckee, swarmed with these dragon-flies during the entire 

 summer. They usually remain in the shelter of the dense herbage, 

 and often squat on the ground like Gomphus. 



When they alight it is nearly always near the ground or the 



