308 
RIGHT WINGS 
MANDIBLES 
Sk _ 
Es Ae 
eal. 
NyYMPHAL LABIUM 
NYMPHAL 
MAXILLA 
mo 
Q SUBGENITAL PLATE 
ADULT HEAD 
AND PRONOTUM 
Neat AGS Me Bi 
ot ABDOMINAL TERGITES 
UPRA-ANAL PROCES 
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fe) 
ABDOMINAL SEGMENTS & 
Fig. 80.—Diploperla buibosa. 
ILLtinors NaturaAL History SurvEY BULLETIN 
Vol. 22, Arta 
FEMALE.—Head, thorax, basal abdom- 
inal segments and appendages in general 
similar to those of male, but slightly larger 
in size. Important differences are as fol- 
lows: Eighth abdominal sternite on pos- 
terior margin with a very large subgenital 
plate which covers most of the ninth ster- 
nite; median posterior margin of this plate 
is distinctly cleft, fig. 80. 
Holotype, male——Great Smoky Mountains 
National Park, Greenbrier Cove, Tenn.: June 
4, 1939, A. C. Cole. 
Allotype, female—Same data as for holo- 
type. 
ye Paratypes.— TEN NESSEE.— GATLINBURG: June 
27, 1940, reared from nymph, T. H. Frison 
Cl al A, 
Nympu. — General color yellowish 
brown with dark brown or fuscous areas 
on head, thorax and abdomen, as in fig. 81. 
Antennae, legs and anal cerci mostly yel- 
lowish brown. 
Head with three ocelli forming an al- 
most equilateral triangle, lateral ocelli 
slightly closer together than each ocellus 
is distant from inner margin of adjacent 
compound eye; no complete occipital ridge, 
but short, stout spinulae with conspicuous 
bases extend around posterior half of com- 
pound eye, and a row of them extends in- 
wards part way to center from inner mar- 
gin of each compound eye; basal segments 
of mouthparts extend out conspicuously 
from sides of head so that head appears 
much broader than pronotum. Labium, 
maxillae and mandibles as im Tigeseus 
glossae and paraglossae terminating in 
nipple-like structures. 
Pronotum broader than long, posterior 
angles or corners more rounded than an- 
terior angles, fig. 81. 
Abdominal tergites with prominent, 
pale-colored spots surrounded by dark 
brown or fuscous, fig. 81. Cerci long, 
many segmented, segments progressively 
longer from base to apex; a longitudinal 
row of long, fine setae on dorsal surface 
in addition to smaller spinelike ones en- 
circling apex of each segment. 
Approximately mature specimens with 
a body length, exclusive of appendages, of 
14+ mm. 
A small nipple-like projection at each 
outer posterior corner of submentum 1s 
suggestive of an atrophied submental gill. 
No true submental gill. 
lows. 
Nymphal and exuvial records are as 20)! 
