532 NEW YORK STATE MUSEUM 



Nymphs 



a Dorsal hooks ou the seventh and eighth abdominal segments long and sharp 



h Lateral setae five auripeunis 



1)1) Lateral setae six cyanea 



hhl) Lateral setae seven -- basal is 



aa Dorsal hooks on the seventh and eighth abdominal segments rudimentary 

 (and hidden among scurfy hairs) or wanting 



1) Lateral setae seven quadrimaculata 



&& Lateral setae eight to nine I)ulchella 



aaa Nymphs unknown 



axillena, plumbea, iueesta and seoiifasciata 



Libellula basalis Say 



1839 Libellula basalis Say, Acad. nat. sci. Phil. Jour. 8:23 

 1839 Libellul a luctuosa Burmeister, Haudb. eut. 2 : 861 

 1861 Libellula luctuosa Hagen, Synopsis Neur. N. Am. p. 152 

 1875 Libellula basalis Hagen, Bost. soc. nat. hist. Proc. 18: 70 

 1893 Libellula basalis Calvert, Am. ent. soc. Trans. 20: 255 (description) 

 1895-97 Libellula basalis Calvert, N. Y. ent. soc. Jour. 3:47 and 5:94 

 (listed from Dobbs Ferry, Ithaca, Kenwood, Niagara river) 



1899 Libellula basalis Kellicott, Odon. Ohio, p. 96 (description) 



1900 Libellula basalis Williamson, Dragon flies Iiid. p. 329 



This is not one of the more common species apparently in New York 

 state. I have taken a few specimens at Ithaca 5 I saw one imago at 

 Saranac Inn, and took one nymph there. I studied and reared the 

 species in 1895 at Galesburg 111., where it is abundant. Of a June 

 morning half an hour after sunrise, I have seen scores of the nymphs 

 transforming at a time on the blue-grass bordered banks of a little pond. 



Nymph. Total length 25 mm; abdomen, 14 mm; hind femur 5.5 

 mm; width of head, 5.5 mm, of abdomen, 6.5 mm. 



The points which will chiefly serve for comparison with other species 

 are as follows : body not very hairy, generally dirty and showing little 

 color pattern; lateral setae, seven; mental setae about 10 or 11, the 

 outer five or six in a longer series ; movable hook, long, slender, little 

 curved; dorsal hooks on abdominal segments 4-8 all sharp and well 

 exposed, but the sixth longest. 



Libellula auripennis Burmeister 



Golden-wing 



1839 Libellula auripennis Burmeister, Handb. ent. 2 : 861 

 1861 Li bell u la auripennis Hagen, Synopsis Neur. N. 4-m. p. 155 

 1866 Libellula auripennis Scudder, Bost. soc. nat. hist. Proc. 10:191 

 1893 Libellula auripennis Calvert, Am. ent. soc. Trans. 20:256 (de- 

 scription) 



