254 NEW YORK STATE MUSEUM 



Nymph. Length 13mm; gills 4.5mm additional. Mental setae 

 three each side. Lateral setae five each side. End hook of 

 lateral lobe of labium preceded by three teeth of moderate size, 

 that are preceded by three others very minute. Gills with scanty 

 and diffuse pigmentation along the axial trachea in its basal two 

 thirds. 



Enallag^a geminatum Kellicott 

 Plate 19, c 

 1895 Enallagma geminatum Kellicott, Ent. News, 6:239 



1899 Enallagma geminatum Kellicott, Odon. Ohio, p.40, fig.ll 



1900 Enallagma geminatum Williamson, Dragon Flies Ind. 



p.272, pl.5, fig.ll, 12 (recorded from New York) 



This is a little species, which flies habitually within half an 

 inch of the surface of the water, and is hard to get a net under. 

 It appears to occur sparingly in New York State, but is abund- 

 ant westward. I bred it at Havana 111. in June 1806, at which 

 time and place it was exceedingly abundant. 



Nymph. Length 13mm, gills 4mm additional. Mental setae 

 four (occasionally three) each side. Lateral setae five. Two 

 minute teeth on the end of the lateral lobe, preceding the three 

 usual larger ones before the end hook. Gills shorter than usual, 

 and practically without pigmentation. 



Enallagma divagans Selys 

 Plate 19, e 

 1876 En all agm a divagans Selys, Acad. Belg. Bui. (2) 41:521 

 1893 Enallagma divagans Calvert, Am. Ent. Soe. Trans. 

 20:238, pl.3, fig.15, 16 



1899 Enallagma divagans Kellicott, Odon. Ohio, p.43, fig.l2 



1900 Enallagma divagans Williamson, Dragon Flies Ind. p. 273, 



pl.5, fig.15, 16 



This species is recorded from Massachusetts and Pennsylvania, 

 but has not, apparently, been taken as yet in New York State. 

 Its nymph is unknown. 



Enallagma piscinarium Williamson 



Plate 19, d 



1900 En allagm a pi s ci n ar i u m Williamson, Dragon Flies Ind. 

 p.273, fig.13, 14 



This species was taken several times during July 1901 at 

 Ithaca, by Mr H. N. Howland, Mrs O. A. Johannsen, and myself. 



