198 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



only two of the posterior segments are blue dorsaUy renders this 

 species less conspicuous than apicalis. 



It was rather more common during Jul}" on the upper portions of 

 the river, and diminished somewhat in numbers during August on 

 the lower river. 



33. ARGIA TRANSLATA Hagen. 



Found in company with the three preceding species, but preferring 

 shady and secluded spots amongst dense vegetation rather than the 

 sunny open. This is rather more of a southern species than the 

 others, but did not occur in such abundance as apicalis. Furthermore 

 none were seen ovipositing in company with the other species, but 

 always in secluded places by themselves. A few specimens were 

 found in every locality the whole length of the river, but it seemed 

 more plentiful during August on the lower river. 



34. ARGIA SEDULA (Hagen). 



This bright-colored species was found in dense vegetation along 

 the banks of small creeks and streams, often in company with 

 Agrion maculatum. It was never found in any numbers — only 

 straggling specimens — but was universally distributed throughout 

 the river and during the entire summer. It is a more showy species 

 than even apicalis, the wide black stripes on the blue thorax standing 

 out conspicuously. 



35. CHROMAGRION CONDITUM (Hagen). 



Two females were taken in company with Agrion maculatum at 

 Ashland City, Tennessee. They w^ere on the shady bank of a small 

 creek flowing into the Cumberland River, and were the only speci- 

 mens seen during the entire season. 



36. ENALLAGMA EXSULANS (Hagen). 



Only two lots of this species were taken, one on the Big South 

 Fork, July 9, and the other at Nashville, Tennessee, August 21. 



The latter was near a small pond; the former was on the river 

 bank. This highly-colored sj)ecies, therefore, does not seem very 

 common since it could hardly escape notice if present at any of the 

 other localities visited. 



37. ENALLAGMA GEMINATUM KellicoH. 



A single specimen of this small species was taken on the Big South 

 Fork in company with the preceding species, and none were seen at 

 any of the other localities. 



38. ISCHNURA POSITA (Hagen). 



This tiny damsel fly was found only around the small ponds at 

 Indian Creek Landing, Kentucky, and near Nashville and Clarksville, 

 Tennessee. Both sexes were taken at each of these localities, but 

 none were seen on the river or any of its tributaries. 



39. ISCHNURA VERTICALIS (Say). 



Found at the small pond near Nashville, Tennessee, August 21, 

 and also near Clarksville, one week later. It was not found an^^where 

 on the river or on any of its tributaries. 



