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. 
Enallagma geminatum Kellicott 
Plate 19, ¢ 
1895 Enallagma geminatum Kellicott, Ent. News, 6:239 
1899 Enallagma geminatum Kellicott, Odon. Ohio, p.40, fig.11 ~ 
1900 Enallagma geminatum Williamson, Dragon Flies Ind. 
p.272, pl.5, fig.11, 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 Ill. in June 1896, at which 
time and place it was exceedingly abundant. 
Nymph. Length 18mm, 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 Enallagma divagans Selys, Acad. Belg. Bul. (2) 41:521 
1898 Enallagma divagans Calvert, Am. Ent. Soc. ‘Trans. 
20:238, pl.3, fig.15, 16 
1899 Enallagma divagans Kellicott, Odon. Ohio, p.48, fig.12 
1900 Enallagma divagans Williamson, Dragon Flies Ind. p.278, 
pl.d, 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 Enallagma piscinarium Williamson, Dragon Flies Ind. 
p.278, 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. 
