. Bulletin. Natural history; Natural history. August, 1944 Ross: Caddis Flies of Illinois 273 dorsal portion, the sternite large and some- what scoop shaped, and with a broad dorso- lateral corner and a narrow sharp, V-shaped mesal incision. Genital capsule as in fig. 915, retracted so that the ventral portion is almost entirely contained within the scoop-shaped eighth sternite. Ninth segment with a large dorsal tuft of long setae, not produced into an internal lobe, the ventral portion almost entirely cut away. Tenth tergite formed of simple strap-shaped sclerites and possibly including also
. Bulletin. Natural history; Natural history. August, 1944 Ross: Caddis Flies of Illinois 273 dorsal portion, the sternite large and some- what scoop shaped, and with a broad dorso- lateral corner and a narrow sharp, V-shaped mesal incision. Genital capsule as in fig. 915, retracted so that the ventral portion is almost entirely contained within the scoop-shaped eighth sternite. Ninth segment with a large dorsal tuft of long setae, not produced into an internal lobe, the ventral portion almost entirely cut away. Tenth tergite formed of simple strap-shaped sclerites and possibly including also the upturned sclerites at the apex of the ninth segment. Near the junc- tion of this sclerite and the ninth segment are two long structures, a long, sinuate, heavily sclerotized spine and a long, stout seta on a long, filiform base, this seta as long as the spine. Claspers fused on meson to form a short, wide lobe. Aedeagus with a small, cylindrical base, a convoluted semi- membranous neck and with the apical por- tion semimembranous at base, expanded into a heavily sclerotized pear-shaped apical bulb containing two internal sclerotized LIMPIA Figs. 919-921.—Leucotrichia, female geni- talia. J, lateral aspect; B, ventral aspect; C, bursa copuiatrix. Female.—In size, color and general structure similar to male. Eighth segment, fig. 919, narrow and cylindrical with a dorsal collar-like portion covered with short setae, the ninth and tenth segments mem- branous and simple. Holotype, male.—Missouri River, Tos- ton, Montana: June 22, 1940, H. H. & J. A. Ross. Allotype, female.—Same data as for holotype. Paratype.—Same data as for holotype, 1 ?. Leucotrichia limpia new species This species is most closely related to pictipes, differing from it in the gray-green banding of the wings, the unmodified basal antennal segments in the male and the unique dorsal loop of the aedeagus. Male.—Length mm. Head and body dark brown, antennae slightly paler and legs below
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
