. Bulletin. Natural history; Natural history. August, 1944 Ross: Caddis Flies OF Illinois 279 Male.—Length mm. Color brown without any conspicuous or distinctive mark- ings. General structure typical for genus. Male genitalia as in fig. 930. Ninth seg- ment short, its posterior angle slightly ob- tuse, its posterior margin with a large, triangular, dorsal lobe bearing a line of setae near apex, and with a mitten-like projection below the triangle; this projec- tion with its main body oval, concave on its mesal face, with a sclerotized point near apex and with a more or less thumblike poste
. Bulletin. Natural history; Natural history. August, 1944 Ross: Caddis Flies OF Illinois 279 Male.—Length mm. Color brown without any conspicuous or distinctive mark- ings. General structure typical for genus. Male genitalia as in fig. 930. Ninth seg- ment short, its posterior angle slightly ob- tuse, its posterior margin with a large, triangular, dorsal lobe bearing a line of setae near apex, and with a mitten-like projection below the triangle; this projec- tion with its main body oval, concave on its mesal face, with a sclerotized point near apex and with a more or less thumblike postero-ventral process. Tenth tergite semi- membranous and more or less hood shaped. Claspers with a broad base, a somewhat sinuate, digitate dorso-lateral lobe and a truncate, ventro-mesal lobe which bears at its apex three long, strong setae the bases of which are almost contiguous. Above the claspers is a long, sclerotized, beaklike struc- ture which is wide at apex and bears a pair of small setae. Aedeagus long and simple, the extreme apex tapering to a very slender, filiform style. Holotype, male.—Turner Falls State Park, Oklahoma, along Honey Creek: June 2, 1937, H. H. Ross. Paratypes.—Oklahoma.—Same data as for holotype, 5 <^ . Reagan, along Penning- ton Creek: June 1, 1937, H. H. Ross, 4^. Turner Falls State Park: June 7, 1938, Carl F. Grubb, 1 ^ . This species has always been taken in company with ayama, and no female has been differentiated in these collections which could be associated definitely with ponta. Mayatrichia acuna new species This species is most closely related to ponta but may be readily distinguished from it by the very small dorso-lateral lobe of the claspers and the undulate margin of the meso-ventral lobe with its staggered and well-separated short setae. Male.—Length 2 mm. Color light brown, without conspicuous markings. Gen- eral structure typical for genus. Male geni- talia as in fig. 931. Ninth segment with the anterior projections of t
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
