. Bulletin. Natural history; Natural history. 170 Illinois Natural History Survey Bulletin Vol. 23, Art. 1. Fig. 591.—Banksiola selina 9. bristles. Tenth tergite forming a dorsal roof wkich narrows from its base and is notched at the posterior margin; on each side near the base is a lateral projection. Aedeagus with a blunt membranous stalk beneath which extends a dark brown, heavi- ly sclerotized flat strap; arising from the base of the aedeagus is a membranous ap- pendage which has on the upper margin of its tip a large number of stout, reddish bristles; this appendage curves down along the
. Bulletin. Natural history; Natural history. 170 Illinois Natural History Survey Bulletin Vol. 23, Art. 1. Fig. 591.—Banksiola selina 9. bristles. Tenth tergite forming a dorsal roof wkich narrows from its base and is notched at the posterior margin; on each side near the base is a lateral projection. Aedeagus with a blunt membranous stalk beneath which extends a dark brown, heavi- ly sclerotized flat strap; arising from the base of the aedeagus is a membranous ap- pendage which has on the upper margin of its tip a large number of stout, reddish bristles; this appendage curves down along the side of the aedeagus, generally on the left side. Claspers very heavy, each termi- nating in a strong dorsal hook and with strong teeth along the posterior margin; seen from below the bases of the claspers meet in a straight line. Female Genitalia.—Fig. 593. Terminal dorsal segment of abdomen rooflike, not unlike that of the male; near its base is a transverse line of bristles and two bunches of these are located toward the tip. Em- bedded in the ventral wall of the eighth ventral segment is a dark brown, corneous structure, thin in the middle and with in- flated lobes at the sides; at the posterior end of this structure there are two spinose arms and between these a shorter, generally broad and rounded projection also covered with spines. These parts vary Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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