96 Intinors NarurAt History Survey BULLETIN 
Paraleptophlebia, but differ in the shape of 
the labrum, figs. 197, 198; in Habrophle- 
biodes, the anterior margin has a deeper 
median cleft. The body is depressed; the 
head is semiflattened and held in a nearly 
hypognathous position. Each maxillary palp 
has three segments, and the labial three. 
Each antenna is as long as the head and 
thorax combined. The claws are long and 
slender and each bears a single ventral row 
of denticles. The abdominal gills are all 
of the same type. Each gill has a slender 
stem which subdivides to produce two long, 
slender, lanceolate filaments. The caudal 
filaments are longer than the body. 
This genus includes three species, one of 
which occurs in Illinois. 
Habrophlebiodes americana (Banks) 
Habrophlebia americana Banks (1903:235). 
Choroterpes betteni Needham (1908: 194). 
After a study of Banks’ types in the Mu- 
seum of Comparative Zoology and the re- 
mains of Needham’s types at Cornell Uni- 
versity, I agree with McDunnough (1925a: 
210) that betteni is a synonym of americana. 
It has two closely related species: brunnei- 
pennis Berner (1946: 61), a southern species 
with amber-tinted wings, and annulata 
Traver (1934:199), a species described 
from Oklahoma that has the _ posterior 
margins of the abdominal segments edged 
with black. 
Mave.—Length of body and of fore wing 
4.5-5.5 mm. Head dark red-brown, an- 
tennae tan. Thorax dark brown; fore coxa 
and femur brown, the latter darker at 
apex, fore tibia tan, brown at apex, fore 
tarsus light tan; middle and hind legs mostly 
light tan or yellowish, with coxae brown, 
and femur of hind leg darkened with brown 
in middle and at apex; wings hyaline, longi- 
tudinal veins faintly brown-stained, cross- 
veins hyaline. Abdomen mostly dark brown, 
with pale yellowish markings of variable 
extent at anterior margins of middle ster- 
nites and tergites; genital forceps, fig. 215, 
light tan to brown, penis lobes light yellow- 
brown; caudal filaments white or light tan, 
articulations darkened. 
FEeMALE.—Length of body and of fore 
wing 5.5-6.5 mm. Head, thorax, and ab- 
domen uniformly rich red-brown, but con- 
siderably lighter than in male; legs and wings 
marked as in male. Ovipositor projecting 
Vol. 26, Art. 1 
slightly past base of ninth sternite. Caudal 
filaments tan, darkened at articulations. 
NympH.—Length of body 5-6 mm. Head 
and dorsum of body chestnut brown, venter 
of thorax and basal abdominal sternites 
white or light yellow, shading to tan on pos- 
terior abdominal sternites; abdominal gills 
hyaline, tracheae black; caudal filaments 
uniformly light brown. 
Known from the eastern and midwestern 
states and eastern Canadian provinces. Oc- 
curs in the shallow, comparatively still eddies 
along the banks of streams. 
216 
Fig. 215.—Habrophlebiodes americana, male 
genitalia. 
Fig. 216.—Traverella albertana, male geni- 
talia. 
