May, 1953 
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= 3 
SS 
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SSeS 
Lae 
Fig. 199.—Leptophlebia sp., mature nymph, 
dorsal aspect. 
palps has three segments. Each antenna is 
longer than the head and thorax combined. 
Each tarsal claw has two rows of ventral 
denticles, a long row from base to near the 
tip on the outer side, and another, shorter 
row near the tip on the inner side. Gills of 
the first abdominal segment are bifid and 
filamentous, fig. 193B; the gills on segments 
2-7 are double and lamelliform, figs. 1934 
and C, each lamella having a terminal, fila- 
mentous extension. Each of the three caudal 
Burks: THE Mayr ies or ILLINots 85 
filaments is slightly longer than the head and 
body combined. 
In this genus, specific characters for the 
females and nymphs have not yet been found. 
KEY ‘LO ‘SPECIES 
Aputt Mates 
1. Abdominal tergites 2-7 white, with dark 
spitacular dats...0 i. 205: 1. johnsoni 
Abdominal tergites 2-7 partly or almost 
completely covered by dark brown 
shading on a tan background........ 2 
Fore wing with apical one-fourth to two- 
fifths shaded with brown, fig. 185; oc- 
casionally a spot at outer apical angle 
of ‘wing hyaline, 2. 425.2 2. nebulosa 
Fore wing completely hyaline except for 
faint, brown shading in stigmatic area, 
Pie Be Get yetsee ae see lar See cee 3. cupida 
i) 
1. Leptophlebia johnsoni McDunnough 
Leptophlebia johnsoni McDunnough 
(1924¢:73). 
Blasturus gracilis Traver (1932a: 133). 
Mave.—Length of body and of fore wing 
8-9 mm. Head very dark, glossy brown, 
with eyes slightly lighter brown. Thorax 
dark brown to black on dorsum and light 
brown to tan on pleura and sternum; wings 
hyaline, with veins and most crossveins dark 
brown, and each fore wing with a light 
brown cloud covering stigmatic and outer 
apical areas. Abdominal segments 2—7 white, 
with dark brown, or black, spiracular dots 
and tan ganglionic marks; segments 8-10 
dark brown; genital forceps white, penis 
lobes yellow; caudal filaments tan, with 
articulations dark brown. 
Known from Connecticut, Massachusetts, 
New Hampshire, New York, North Caro- 
lina, Ontario, and Quebec. 
2. Leptophlebia nebulosa (Walker) 
Palingenia nebulosa Walker (1853: 554). 
Potamanthus odonatus Walsh (1862:372). 
No authentic Walsh material of odonatus 
is known to be in existence, but the charac- 
ters given in Walsh’s original description of 
the species certainly indicate that odonatus 
is a synonym of nebulosa. When Spieth 
(1940: 327) examined the type of nebulosa 
in the British Museum, he found no reason 
to alter the concept of the species as currently 
identified. 
Mave.—Length of body and of fore wing 
10-12 mm. Head dark brown, eyes slightly 
