162 Iutinors NarurAL History Survey BULLETIN 
RUBRUM 
Vol. 26, Art. 1 
nn een! fear! ORL SEES 
PULCHELLUM 
Fig. 355.—Stenonema rubrum, male genitalia. 
Fig. 356.—Stenonema pulchellum, male genitalia. 
Fig. 357.—Stenonema tripunctatum, fifth gill of nymph. 
Fig. 358.—Stenonema interpunctatum, fifth gill of nymph. 
Fig. 359.—Stenonema nepotellum, fifth gill of nymph. 
black dash; stigmatic area stained yellow- 
brown; outer margin of hind wing dark 
brown. Abdomen white, with a faint gray 
or green tinge; posterior margin of each 
tergite bordered with brown or black; spi- 
racular dots absent; penis lobes lacking 
lateral spines, fig. 331; genital forceps and 
caudal filaments uniformly gray-tan. 
NympH.—Length of body 10-12 mm. No 
pale, mesal spot on anterior margin of head. 
Abdominal dorsum almost uniformly brown, 
with only a pair of short, narrow, submedian, 
light-colored marks at anterior margin of 
each tergite; sternum uniformly light gray- 
tan, without darker markings; gills on seg- 
ments 1-6 pointed at apexes, on 7 slender, 
with a single, longitudinal trachea in each; 
caudal filaments dark. 
Known from New York, North Carolina, 
Quebec, South Carolina, Tennessee, and 
West Virginia. 
2. Stenonema candidum Traver 
Stenonema candidum Traver (1935a:308). 
Spieth (1947:109) considers this to be a 
synonym of the form he designates inter- 
punctatum frontale (Banks). I have seen 
the types of candidum and, as can be seen 
from fig. 332, the genitalia are quite dis- 
tinct from those of all other species in the 
genus. 
Ma.e.—Length of body 7-8 mm., of fore 
wing 9-10 mm. Head deep yellow, a black 
mark on face below each antennal socket; 
antennal scape and pedicel dark yellow, fla- 
gellum gray-tan at base, fading to white at 
apex; eyes in life light gray-green. Thorax 
bright yellow, with mesonotum brown ex- 
cept on lateral margins and at apex of 
scutellum; legs yellow, with fore leg a little 
darker yellow, each femur with a median 
and an apical black band, median band of 
