536 NEW YORK STATE MUSEUM 



Libellula pulchella Drury 



Plate 23, flg. 2 



1773 Libellula piilcliella Drury, Ilhis. exotic eut. v. 1, pi. 48, fig. 5 

 1857 Libellula confusa Uhler, Acad. nat. sci. Phil. Proc. p. 87 

 1861 Lib ellula pulchella Hagen, Synopsis Naur. N. Am. p. 153 

 1893 Libellula pulchella Calvert, Am. cut. soc. Trans. 20:259 

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

 5:94 (listed from Keeseville, Dobbs Ferry, New York, Ithaca, Scho- 

 harie and Buffalo) 



1898 Libellula pulchella Needham, Outdoor studies, p. 56, fig. 55 



1899 Libellula pulchella Kellicott, Odon. Ohio, p. 101 (description) 



1900 Libellula pulchella Williamson, Dragon flies Ind. p. 332 (descrip- 



tion) 



This beautiful, pond-loving species is one of the best known of all 

 Odonata peculiar to North America. The old and white pruinose males 

 hovering over the open water under the summer sun are certainly suffi- 

 ciently striking to catch the eye of the most casual observer. The 

 species was not common at Saranac Inn. But a few specimens were 

 seen there. I reared one specimen there, many at Ithaca (where the 

 species is abundant) and many in Illinois. 



Nymph. Total length 26 mm ; abdomen 16 mm; hind femur 6 mm ; 

 width of head 6 mm, of abdomen 8 mm. 



All the ridges on the dorsum of this nymph are fringed with stiff, 

 strong, erect hairs ; these are specially marked about the borders of the 

 prothoracic shield, and on the rear of the head; the labium is rather 

 regularly rounded on the prominent median lobe, lacking the median 

 toothlike prominence of some of the other species; the lateral setae are 

 eight to nine ; mental setae 12-13, the seven outermost each side longest; 

 the lateral spines are moderate ; the dorsal hooks are quite distinctive, 

 being represented only on segments 4-6, rudimentary, or sometimes 

 wanting altogether. Among my Ithaca nymphs were a good many on 

 which I could find no dorsal hooks at all. My Illinois specimens agree 

 with the nymph from Peoria III, figured by Cabot, 1 and referred by 

 doubtful supposition to Neurocordulia obsoleta. 



PLATHEMIS 



There is a single species within our limits. 



Plathemis lydia Drury 



Plate21, fig. 1 

 1770 Libellula lydia Drury, Illus. exotic ent. 1 : 112, pi. 47, fig. 4 

 1773 Libellula trimaculata DeGeer, Mem. ins. 3 : 556, pi. 26, fig. 2 



1854 Emmons, Agric. N. Y. v. 5, pi. 15, fig. 4 and 5 (no name or 



description) 



- Immature state of the Odonata. pt 3, pi. 6, flg. 6. 



