NO. 1692. DRAOONFLIES OF THE MISSISSIPPI VALLEY— WILSON, ^59 



9. TETRAGONEURIA SPINIGERA (Selys). 



As common as the preceding; some dead ones seen floating in the water, 

 with fish jumping for them. 



10. ARGIA APICALIS (Say). 



Both sexes found around the heaps of clam shells on the east bank of the 

 river near Pleasant Farms. 



11. ARGIA MCESTA PUTRIDA (Hagen). 



Both sexes found in company with A. apicalis. 



12. ^SHNA JUNCEA VERTICALIS (Hagen). 



Many seen flying across the river and along the east bank. 



13. ANAX JUNIUS (Drury). 



Many seen flying across the river and along both banks. 

 It was noted that the species of Tetragoneuria mated most often 

 during the hour preceding sunset. Many couples could then be seen 

 flying over the water, and they would approach the boat and even 

 alight on it. Gomphus^ Anax^ and ^shna were each seen plunging 

 into the water after insects. Anax went in like a kingfisher, sub- 

 merging its whole body and evidently grasping the insect with its 

 feet. None of them apparently wet its wings while doing this, at 

 least not enough to hinder it at all in its flight. 



V. PRESCOTT, WISCONSIN, JULY 13 TO 15. 



1. LIBELLULA PULCHELLA Drury. 



Not common, only a few seen flying across the river. 



2. LIBELLULA QUADRIMACULATA Linnaeus. 



. Only four individuals of this species seen. 



3. ^SHNA CONSTRICTA Say. 



Common flying about in the woods near the St. Croix River; four females 

 secured. It alights on the sides of tree trunks or hangs vertically 

 downward from the underside of a twig or a leaf, and in this position 

 quietly munches the insect it has secured. It is more active toward 

 night, coming out of the woods and flying about over the water. 



4. GOMPHUS VASTUS Walsh. 



Common on the rocks along the shore of the river ; all that were secured 

 proved to be males. 



5. GOMPHUS FRATERNUS (Say). 



Not as common as G. vastus; the two that were secured were females. 



6. DIDYMOPS TRANSVERSA (Say). 



Two males caught in the woods along shore, others seen but only in a 

 single restricted locality. 



7. ARGIA MCESTA PUTRIDA (Hagen). 



Both sexes common along the rocky shore close to the water. 



8. ARGIA VIOLACEA (Hagen). 



Both sexes common in company with A. mr/sta piitrida. 



9. LESTES RECTANGULARIS Say. 



Three males taken in the grass along the banks some distance from the 

 water, where it was shady ; four other males were taken along a 

 slough on the opposite side of the river. 



10. GOMPHUS EXTERNUS Selys. 



A single male taken on the river bank in front of the town. 



