BOYERIA 127 
above the shining surface, on well poised, transparent wings, which, 
against the background of the water, are well nigh invisible. They do 
not fly very rapidly. They haunt the shadows in the edges of the woods, 
and when discoverable they are not hard to capture. 
The nymphs are blackish and smooth of body with obscure rings of 
paler color on the legs. The hind angles of the head are sharply angu- 
late. There is a minute brown tooth on the front border of the median 
lobe of the labium, a little remote from the median cleft. The superior 
appendage of the male is narrowly cleft lengthwise at the tip. 
They cling to timbers, fallen trash and drift wood and to roots that 
trail in the stream. 
Nymphs 
Name Length Lateral spines Width by length Described by 
of labium 
vinosa 35 5-9 x2 Cabot ’81, p. 29* 
grafiana 38 4-9 less than 1X2 | Walk. 713, p. 164 
* Also by Ndm. ’01, p. 465 & Ndm. & Hart ’01, p. 36, fig. 
KEY TO THE SPECIES 
Adults 
1 Side spots of the thorax yellowish; abdominal segments 9 and 10 
unlike in color, 10 more yellowish.............. vinosa, p. 127 
Side spots of thorax bluish; abdominal segments 9 and 10 alike 
in color; greenish blue sires.) eanehoa eames grafiana, p. 128 
81. Boyeria vinosa Say 
Say ’39,p. 13: Mtk. Cat. p. 102: Wlsn. ’12, p. 192: Howe ’19, p. 41: ’23, p. 126. 
Garm. ’27, p. 172. 
Syn: quadriguttata Burm. 
Length 64 mm. Expanse 80 mm. Me. and Wis. to Ark. and Tenn. 
A slender brownish species with conspicuous yellow side spots on thorax. 
Face and thorax pale except for a very obscure brownish T spot above on the 
latter. Occiput yellow, brown at the sides. Thorax brown in front with very 
obscure pale stripes diverging forward and dilated above. Sides of thorax brown 
with the 2 round spots of bright yellow. Wings hyaline except for a short brownish 
basal spot; veins brown and stigma tawny. Abdomen with moderately expanded 
basal segments and very obscure coloration; wholly brown with black apical 
carinae and the sides of the tenth segment paler. Appendages brown, the lower 
one paler. 
