248 NEW YORK STATE MUSEUM 
1895-97 Amphiagrion saucium Calvert, N. Y. Ent. Soc: Jour. 
3:48 and 5:92 (listed from Westchester county, Ithaca, Karner 
and Buffalo) 
1898 Amphiagrion saucium Davis, N. Y. Ent. Soe. Jour. 6:196 
(listed from Staten Island) 
1899 Amphiagrion saucium Kellicott, Odon. Ohio, p.31 
1900 Amphiagrion saucium Williamson, Dragon Flies Ind. p.267 
This is a meadow-rivulet-loving species. I have found it ina 
number of localities, but only in very small, reed-choked, spring- 
fed brooks. The imagos, which will at once be recognized by 
their deep red color, are found only in the vicinity of their 
native streamlet, where they flit about chiefly among the stems 
in or overhanging the water. : 
In 1896 I located the species in a small meadow brook near 
the head of Lake George at Galesburg IIl., but too late for 
rearing it that season. The following year, having removed to 
New York, I requested Dr W. E. Castle, then living in Gales- 
burg, to collect and rear the nymphs. This he did, securing the 
first transformation of a specimen June 2, 1897. To Dr Castle, 
therefore, belongs the credit for material for this life history. 
Further specimens of the nymphs from the same brook were 
sent me afterward ty Mr G. B. Smith of Knoxville Ill., and I 
have since received others from various points in the West. 
The nymph is at once recognized among related forms by its 
thickset body and the remarkably prominent hind angles of | 
the head. 
Nymph [p1.18, fig.3]. Measures in length 11mm, gills 4mm addi- 
tional. Color brownish, paler on antennae and on sutures; eyes 
and a divided median line on the thorax black; abdomen with 
lateral margins pale, a black point above and another below this 
line toward the apex of each segment; gills pale, with a series of 
black dashes along the axis; tibial spines and apexes of all leg 
segments and claws brown. 
Body and legs short and thick. Head quadrangular, hardly 
wider than long, with prominent, well rounded eyes and behind 
them strongly projecting, squarely cut hind angles; middle third 
of hind margin of head ‘deeply excavated; ocelli very evident. 
Prothorax closely fitted into excavation of rear of head. 
Antennae six jointed. Labium short, mentum a third longer 
than wide, considerably contracted at the base; median lobe not 
very prominent, serrulate on margin, with short, incurved, flat- 
tened microscopic scales arising between the serrulations; men- 
