. Bulletin. Natural history; Natural history. March 1938 ROSS: NEARCTIC CADDIS FLIES 159 Cerci shorter than tenth tergite, narrow, pointed and clothed with long setae. Claspers short, the base enlarged and bulbous, especially when seen from the side, the apical portion divided into a short, sharp lateral angle and a wider mesal lobe. The lateral half of the clasper is provided with abundant long setae, and the oblique apical margin ot the mesal lobe bears a dense row of short, peglike setae. From the base of the clasper arises a long, sclerotized, filamentous process which curves near the base
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. Bulletin. Natural history; Natural history. March 1938 ROSS: NEARCTIC CADDIS FLIES 159 Cerci shorter than tenth tergite, narrow, pointed and clothed with long setae. Claspers short, the base enlarged and bulbous, especially when seen from the side, the apical portion divided into a short, sharp lateral angle and a wider mesal lobe. The lateral half of the clasper is provided with abundant long setae, and the oblique apical margin ot the mesal lobe bears a dense row of short, peglike setae. From the base of the clasper arises a long, sclerotized, filamentous process which curves near the base and thence follows the direc- tion of the oedagus; the apical portion of this process is slightly fusiform with the apex narrowed and slightly upturn- ed. The processes of each side are sim- ilar in general outline. Oedagus arcuate, the basal portion tubular and the apical portion composed in part of semimem- branous folds which are difficult to dis- tinguish. Holotype, male.—Pushmataha County, Ok- lahoma: May 28, 1934, C. A. Soeler. Triaenodes perna new species A close relative ot helo Milne, this species differs in the constricted claspers and the much stronger asymmetry ot the ribbonlike processes which arise at their base. Male.—Length 9 mm. Color of head, body, antennae, mouthparts and legs same as tor ty'idonta. Wings with a fairly well defined pattern as tollows: Front wing basad of cord with a nearly parallel- sided, dark brown stripe occupying about one-half of the width of the wing, set off from the anal margin by a narrow, tawny border and from the costal region by a tawny border which is narrow at the base and gradually increases in width to the cord; the area beyond the cord is dark brown, unicolorous with the dark streak on the basal part of the wing, except for the small continuation ot the tawny costal part, which tapers off beyond the stigma, and indications of tawny shading along the extreme distal edge of the wing. General struc- ture typical of the subg