86 Intinois NarurAL History Survey BULLETIN 
lighter brown. Entire thorax very dark 
brown, almost black, each fore leg brown, 
middle and hind coxae brown, rest of middle 
and hind legs tan; wings hyaline, veins and 
most crossveins tan or brown, crossveins 
toward posterior margin in either wing often 
hyaline, stigmatic crossveins of each fore 
wing extremely numerous, anastomosed, a 
brown cloud covering outer, apical one- 
fourth to two-fifths of fore wing, fig. 185, 
but sometimes with extreme outer, apical 
angle hyaline, making wing appear to have a 
broad subapical, brown crossband. Dorsum 
of abdomen almost or entirely dark brown, 
sometimes becoming tan along lateral mar- 
gins of tergites, and often with a pair of 
submesal, short, lunate, tan marks present 
at anterior margin of each tergite; sternites 
1 and 2 light brown, sternites 3-8 tan or 
yellow with, sometimes, vague brown shad- 
ing, sternites 8 and 9 brown; genitalia, fig. 
200, with forceps tan and penes brown; 
caudal filaments brown, articulations darker 
brown. 
FEMALE.—Length of body 10-12 mm., of 
fore wing 12-14 mm. Color much as in 
male, but somewhat lighter. Head with yel- 
low shading on each side, near eyes. Thorax 
with yellow areas on pleura, with sternum 
mostly yellow-brown; wings without brown 
shading. Dorsum of abdomen as in male, 
sternum entirely tan or yellow-brown, apical 
two sternites always a little lighter than 
others; caudal filaments tan or light brown, 
articulations darker brown. 
Known from northeastern and midwestern 
states and southeastern Canada. Develops in 
ponds or in the still eddies along the banks 
of streams. 
Illinois Records.—CHEsTeERVILLE: April 
15—May 1, 1936, Ross & Mohr, 94. Dan- 
VILLE: May 9, 1926, T. H. Frison, 1¢. 
GEorGETOWN: April 14, 1930, Frison & Ross, 
44, 22. Havana: April 15, 1898, Hart, 
14; April 18, 1894, Hart, 14; April 21, 
1898, Hart, 1 g ; April 22, 1898, Hart, 114, 
72; April 24 & 25, 1898, Hart, 164, 109; 
April 28 & 29, 1898, Hart, 14,29. Homer: 
April 27, 1907, 1g. Manomer: April 16, 
1925, T. H. Frison, 4 4, 19 ; April 23, 1925, 
T. H. Frison, 123, 392. Sr. Josepu: Salt 
Fork River, May 3, 1914,1 2,292. Urpana: 
April 25, 1949, J. E. Porter, 1. Warson: 
April 15—May 5, 1936, Ross & Mohr, 102. 
Wauvuconpa: April 30, 1942, Ross & Burks, 
26,192. White Heatu: April 16, 1932, 
Vol. 26, Art. 1 
Ross & Riegel, 1 ¢ ; April 22, 1917,14,19; 
April 28, 1916, 1 6 ; Sangamon River, May 
5, 1940, H. H. Ross, 26, 42; May 10, 
1938, H. H. Ross, 124. 
3. Leptophlebia cupida (Say) 
Ephemera cupida Say (1823: 163). 
Ephemera hebes Walker (1853: 538). 
Palingenia concinna Walker (1853: 553). 
Palingenia pallipes Walker (1853:553). 
Baetis ignava Hagen (1861:47). 
Mave.—Length of body 9-11 mm., of 
fore wing 10-12 mm. Head very dark 
brown, almost black, eyes slightly lighter 
brown. Thorax uniformly very dark brown 
to black. Each fore leg dark brown, middle 
and hind legs slightly lighter brown; wings 
hyaline, with brown staining at bases and 
light brown shading in stigmatic area of 
each fore wing, fig. 186; stigmatic crossveins 
numerous, only slightly or not at all anas- 
tomosed. Dorsum of abdomen dark brown, 
with tan crossline at posterior margin and 
tan stripe along either lateral margin of 
each tergite, often a large, irregular, median, 
tan mark on each tergite; sternites 2-7 tan 
or very light brown, sternites 1, 8, and 9 
washed with brown; genital forceps at base 
tan or yellow, becoming brown at apexes, 
penes brown; caudal filaments gray-brown, 
articulations darker brown. 
FEMALE.—Length of body 9-11 mm., of 
fore wing 10-12 mm. Generally slightly 
lighter in color than the male. Head dark 
brown only between and posterior to ocelli, 
otherwise tan. Thorax dorsally dark brown, 
pleura marked with tan, sternum tan on 
meson; wings usually not darkened at bases, 
sometimes faintly so; each fore leg dark 
brown, middle and hind legs yellow-brown 
or tan. Dorsum of abdomen dark brown, 
each tergite yellow or tan at posterior and 
lateral margins, entire sternum yellow or 
tan; caudal filaments as in male. 
Known from the northeastern and mid- 
western states and southeastern Canada. 
Develops in ponds or in the still eddies along 
the banks of streams. 
Illinois Records——Herop: March 24, 
1939, Ross & Burks, 1 ¢ ; April 4, 1948, 3 6 ; 
April 8-9, 1947, B. D. Burks, 2¢, 32. 
Kickapoo STATE Park: May 4, 1947, Ross 
& Stannard, 1¢. Rock Istanp: 116, 39 
(Walsh 1862:372). RupEMENT: Blackman 
Creek, April 7, 1947, B. D. Burks, 19. 
