DRAGONFLIES AND DAMSELFLIES IN PONDFISH CULTURE. 259 
LESTES UNCATUS Kirby. 
Lestes uncatus Kirby, Synonymic Cat., 1890, p. 160. 
A single male of this species was captured in one of the runs that stretch back onto the prairie 
August 10, 1917. The species can not be at all common in this vicinity, since this is the only specimen 
secured during four years of collecting. 
ISCHNURA (NEHALENNIA) POSITA (Hagen). 
Agrion positum Hagen, Synop. Neurop. N. A., 1861, p. 77. 
Needham (1903, p. 260) places this species in the genus Ischnura “chiefly because of the form of 
the abdontinal appendages in the male and the small round postocular spots.’’ Like verticalis, it 
appears early in the spring and continues until late in the fall, and its nymphs are associated with 
those of verticalis in the ponds. In habits and in their relation to the fish life of the ponds the two species 
may be treated as one. 
NEHALENNIA IRENE (Hagen). 
Agrion irene Hagen, Synop. Neurop. N. A., 1861, p. 74. 
This tiny species is associated with Lestes, frequenting the grass and vegetation in damp places. 
Like Ischnura, it feeds upon gnats and midges. Neither the imagos nor the nymphs occur in sufficient 
numbers to affect the life of the ponds. 
AMPHIAGRION SAUCIUM (Burmeister). 
Agrion saucium Burmeister, Handb. Entomol., vol. II, 1839, p. 810. 
A male and two females of this species were captured around the ponds below the railroad track 
July 26, 1917; none had ever been seen near the ponds in series D. However, this species is sometimes 
found in great numbers, and it may be that once obtaining a start here they will increase sufficiently 
to rank alongside the Enallagma species. 
