90 Journal New York Entomological Society. [Voi. v. 



and immature. But even when fully matured they were sluggish and 

 easy to capture. By the middle of July they had mostly disappeared. 



Tetragoneuria spinigera Selys. One female taken on the side 

 of a house nearly a mile from the river in May. Dr. Kellicott identified 

 this as spinigera with some doubt, but expressed himself as certain that 

 it was distinct from either of the two preceding. 



Somatochlora tenebrosa Say. One example of this beautiful in- 

 sect was taken in a tamarack swamp at Clarence, N. Y., July 2, 1S95. 



Somatochlora linearis Hagen. Taken on Grand Island by|Mr. 

 Philip Fischer. 



Tramea lacerata Hagen. One specimen taken in the^city far 

 from the water on August 20th. 



Libellula basalis Say. Common through June and [July along 

 Niagara River and Tonawanda Creek, where the water is deep. 



Libellula quadrimaculata Linn. Numbers seen about a springy 

 spot among the hills in July, 1S95. These, though perfectly mature, 

 were of a rich olive brown color, becoming greenish on the mesonotum, 

 and the black basal triangles on the hind wings were conspicuously 

 veined with white. Though differing in some respects from'^typical ex- 

 amples. Dr. Kellicott pronounces them undoubtedly quadrimaculata. 



Libellula semifasciata Burm. June and July. Rare'about Buf- 

 falo, but seen in considerable numbers along the railroad ditches at 

 Ridgeway, Ont. 



Libellula pulchella Drury. June to August. Abundantjevery- 

 where but especially about Black Rock Harbor. 



Plathemis trimaculata De Geer. Common around mill-ponds 

 and stagnant pools everywhere in the country about Buffalo, but' rarely 

 seen along Niagara River. 



Leucorhinia intacta Hagen. Very abundant on the stones and 

 water plants in Niagara River and Black Rock Harbor through June 

 and early July. This species shows much variation in the extent of the 

 yellow markings on the abdomen and of the fulvous shade on the base 

 of the wings. When fully colored it is a most beautiful insect. Back 

 in the country it is rarely seen, only a few individuals find their home 

 along deep sluggish streams. 



Diplax rubicundula Say. Common from July to September. The 

 immature taken in June. 



