668 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxvi. 



Of damselflies there were the two species of Argia^ apicalis (Say) 

 and tibialis (Rambur). 



XXVri. HARDIN, ILLINOIS, AUGUST 12 AND 13. 



Here were found a few specimens each of Libellula pulchella 

 Drury, Tetragoneuria cynosuta (Say), Anax junius (Drury), and 

 Gomphiis amnicola Walsh, together with large numbers of Ischnura 

 verticalis (Say), and a few males of Enallagma piscinarium Wil- 

 liamson. 



XXVIII. MISSISSIPPI RIVER FROM GRAFTON TO CAIRO, ILLINOIS, AUGUST 



13 TO 20. 



No stops were made between Grafton and the mouth of the Mis- 

 souri River, but the dragonflies and damselflies were as common as 

 they had been and could be seen along either bank flying over the 

 water or in the bushes. A run was made up the Missouri for 8 or 10 

 miles and back, but not a solitary dragonfly was seen, and this con- 

 tinued all the way down to Cairo. 



Repeated landings were made and the banks diligently searched 

 for specimens, but without finding even one. This abrupt demarka- 

 tion is no doubt due to the muddy water poured in by the Missouri 

 River. No dragonfly larva could rightly be expected to live in such 

 a medium, and their absolute refusal is what might naturally be 

 looked for. 



XXIX. JOHNSONVILLE, TENNESSEE, AUGUST 21. 



On ascending the Ohio River the dragonflies began to appear again, 

 and were as numerous as ever on reaching Paducah, at the mouth of 

 the Tennessee River. For the entire length of this latter river to 

 Riverton, Alabama, Gomphus was particularly abundant and could 

 be seen at all hours of the day flying over the water. The first stop 

 for collecting was made at Johnsonville, and here were found Lihel- 

 lula pidchella Drury, Macromia tceniolata Rambur, Erythemis sim- 

 plicicoUis (Say), Fachydiplax longipennis (Burmeister) , Platliemis 

 lydia (Drury), Argia mmsta putrida (Hagen), A. tibialis (Ram- 

 bur), A, violacea (Hagen). 



The shore at this particular place was not suitable for Gomplius^ 

 and none was secured. 



XXX. SAVANNAH, TENNESSEE, AUGUST 23. 



Here the shores were favorable for Gomphus and three species 

 were caught — vastus Walsh, notatus Rambur, and one undetermined. 

 No other dragon flies seen. 



XXXI. RIVERTON, ALABAMA, AUGUST 24 TO 26. 



The banks of the river were high and dry, except in one place 

 in the outskirts of the town, where were a few small swampy ponds. 



