no 



American Midland Naturalist Monograph No. 3 



than the width of one lobe and crowned with numerous short stout spines. 

 Tenth sternite (X-S) heavily sclerotized, with several strong teeth on apex and 

 a broad sclerotized striated structure near base (this striated structure is prob- 

 ably the basal portion of the tenth tergite). Phallosome (Ph) broadest at base, 

 tapered to a pointed apex, open dorsally and ventrally, formed of two separ- 

 ated elongated plates which are heavily sclerotized except for an apical hyaline 

 portion; hyaline portion with tooth-like divisions subapically; heavily sclerotized 

 portion v/ith a short subapical projection directed dorsally. Claspette absent. 

 Basistyle (Bs) conical, a little more than twice as long as basal width, rounded 

 at apex, clothed with long setae; basal lobe (B-L) conical, appressed to basi- 

 style, bearing several spine-like setae apically and numerous smaller setae on 

 sides; apical lobe absent. Dististyle (Ds) about half as long as basistyle, stout, 



Fig. 56. Larva of Culisela inornala (Willisfon). A, Pecten tooth. 

 B, Terminal segments. C, Comb scale. D, Head. 



