248 NEW YORK STATE MUSEUM 



1895-97 Amphiagrion saucium Calvert, N. Y. Ent. Soc. Jour. 

 3:43 and 5:92 (listed from Westchester county, Ithaca, Karner 

 and Buffalo) 



1898 Amphiagrion saucium Davis, N. Y. Ent. Soc. Jour. 6:19G 



(listed from Staten Island) 



1899 Amphiagrion saucium KelHcott, Odon. Ohio, p.31 



1900 Amphiagrion saucium Williamson, Dragon Flies Ind. p.267 



This is a meadow-rivulet-loving species. I have found it in a 

 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 111., 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 Oastle, 

 therefore, belongs the credit for material for this life history. 

 Further specimens of the nymphs from the same brook were 

 sent me afterward tv Mr G. B. Smith of Knoxville 111., and I 

 liave 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 [pi. 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 ver^^ 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- 



