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American Midland Naturalist Monograph No. 3 



ADULT MALE. — Coloration, palpi and antennae similar to those of female. 

 TERMINALIA (Fig. 45). Lobes of ninth tergtte (IXT-L) small, sclerotized, 

 widely separated, connected by a narrow, transverse band; each lobe armed 

 with two short, stout spines. Tenth sternite (X-S) moderately sclerotized, with 

 two or three small subapical setae. Phallosome (Ph) about two-thirds as long 

 as broad, narrower at base, somewhat broadened hood-like toward apex, open 

 ventrally, closed dorsally. Claspette absent. Basistyle (Bs) nearly three times 

 as long as basal width, curved, a little narrower beyond middle; general vesti- 

 ture consisting of scales and short setae; three very long, strong setae arising 

 dorsally near base. Basal lobe (B-L) sub-triangular, bearing a spine and numer- 

 ous small setae (this structure is probably not a true basal lobe, but a modifica- 

 tion of the interbasal fold) ; apical lobe absent. D'tsti style (Ds) as long as basi- 



Fig. 46. Larva of Wyeomyia mitchellil (Theobald). A, Terminal 

 segments. B, Head. C, Comb scale. 



