SYMPETRUM 237 
of yellow at the extreme base (or sometimes throughout the membrane) and 
with a brown stigma. Abdomen reddish with a row of lateral black triangles on 
segments 4-9 forming a marginal stripe. Appendages reddish yellow. 
Pale teneral yellowish specimens of this species begin fluttering up 
out of the grasses that fill the shallow waters in the upper reaches of 
most ponds about the latter part of June. A month later when they have 
assumed their brilliant red and black coloration and have become more 
numerous, we find them scattered everywhere. They seem most nu- 
merous however about wet meadows, where they delight to go foraging. 
The female in ovipositing is accompanied by the male. He seems to 
direct the course and to assist in the flight. Together they descend to 
touch the water many times in rapid succession in nearly the same 
place; then a short flight, and many more descents together in a new 
place. 
218. Sympetrum assimilatum Uhler 
Uhler 57, p. 88: Mtk. Cat. p. 160: Ris ’11, p. 682. 
Length 40 mm. Expanse 62 mm. N. Y. to B. C. and Neb. 
A rather large species with hyaline wings flavescent at base. Face and 
vertex yellowish with a black cross stripe through the middle ocellus. Occiput 
brown. Thorax olive brown clothed with a thin brown pubescence and some- 
times obscurely striped, in which case a narrow pair on the front, and 2 broad 
stripes behind the principle lateral sutures all abbreviated above, appear. Legs 
fuscous, paler basally and beneath the front femora. Wings hyaline, flavescent 
to a very variable degree over the basal half; stigma brown, paler at ends. 
Abdomen reddish with lateral black triangles on middle segments, widened 
toward the apices of these segments and forming a continuous black lateral line. 
Appendages obscure reddish yellow. 
The senior author (Ndm. ’01, p. 524) found that this species at Old 
Forge, N. Y. “‘could be seen any clear morning climbing up the Spar- 
ganiums tems and transforming.” 
“July to September in marshes and woods.” (Mtk. ’08, p. 110.) 
219. Sympetrum semicinctum Say 
Say 739, p. 27: Mtk. Cat. p. 164: Ris’11, p.690: Kndy. 717, p. 623: Howe ’20 
p. 82: Garm. ’27, p. 274. 
Length 31 mm. Expanse 52 mm. Me. and Pa. to B. C. 
A very pretty reddish brown species with broad flavescent bands of variable 
depth of color covering more or less of the basal half of the wings. Face yellow, 
reddish above, narrowly cross striped with black through the middle ocellus. 
Thorax reddish brown clothed with brown pubescence, usually without pattern 
but sometimes showing narrow black lines on sutures below. Legs black beyond 
basal femora. Wings hyaline beyond the very broad flavescent cross band which 
