. Bulletin. Natural history; Natural history. 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 ver
. Bulletin. Natural history; Natural history. 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 Holotype, male.—Zion, Illinois, along Dead River: June 3, 1938, Mohr & Burks. Allotype, female.—Zion, Illinois: larva from Dead River, emerged June 12, 1940, Mohr & Burks. Paratypes.—Illinois.—Zion: Same da- ta as for holotype, 4? ; July 7, 1937, Frison & Ross, 1^,1$; same data as for allotype, 2 9 . Four paratypes are deposited in the collection of Dr. Betten. Additional specimens have been examined from Illinois, Massachusetts, Michigan, Minnesota, New York and Ontario. This species has heretofore always been identified as concatenata. The type of the latter (described by Betten & Mosely 1940) is a female in which Mg and M^ are sep- arate nearly t
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