62 American Midland Naturalist Monograph No. 3 



a few narrow whitish scales on anterior promontory and black setae on lateral 

 fossae. Abdomen: Integument of abdomen dark-brown to black, clothed with 

 numerous yellow to dark-brown hairs. Legs: Legs dark, femora and tibiae 

 tipped with white. Wings (Fig. 30E) : Scales black and white to yellowish- 

 white, arranged on the veins in contrasting lines and spots (costa dark-scaled 

 except for pale spot at extreme tip; vein 6 with three spots of dark scales; 

 stem on vein 5 apparently always partially or entirely dark-scaled). Halter: 

 Knob of halter black-scaled. 



ADULT male. — Coloration similar to that of female but only two dark 

 spots present on vein 6. TERMINAlia (Fig. 30). Ninth tergite (IX-T) a 

 narrow, sclerotized band; lobes (IXT-L) lateral in position, very long and 

 slender (about 7 to 9 times as long as broad), rounded or bluntly pointed 

 apically. Tenth sternite absent; anal lobe (An-L) large, triangular, spiculate. 

 Phallosome (Ph) cylindrical, furcate at base; apex with three or four pairs 

 of ligulate leaflets (Ph-L), the more distal pairs longer, one or more pairs 

 of leaflets with a few short, coarse, basal teeth. Claspette (CI) with dorsal 

 and ventral lobes fused to form a single fleshy, conical lobe on each side; arma- 

 ture variable but usually consisting of two large, pointed spines on apex (one 

 slightly below the other), one long, slender spine arising from inner surface 

 near middle, and one to three large pointed spines arising from outer sur- 

 face near middle. Basistyle (Bs) conical, about twice as long as broad, rounded 

 apically, clothed with long setae and many large scales on outer aspect; two 

 parabasal spines (P-S) and one internal spine (I-S) present. Dististyle (Ds) 

 longer than basistyle and lacking spicules (minute non-papillated hairs), 

 curved, narrower medially, bluntly pointed at tip; terminal claw (Ds-C) 

 short, blunt. 



larva (Fig. 31). — Head: Inner clypeal hairs (2) simple, arising from 

 basal tubercles separated by less than the diameter of one of the tubercles; 

 outer clypeal (3) densely dichotomously branched, fan-shaped; postclypeal 

 (4) small, single or branched, extending slightly beyond bases of inner and 

 outer clypeals (2 and 3); frontal hairs (5-7) large, plumose; sutural (8) 

 and trans-sutural (9) usually 4- to 5-branched; antenna spinose; terminal 

 hair (10) with several branches, longer than the sabres; antennal tuft (11) 

 inserted on basal third of shaft, several branched, reaching to or slightly 

 beyond middle. Thorax: Prothoracic dorsal submedian hairs (1-3) consist- 

 ing of a short inner hair (1), simple or sparsely branched apically; a much 

 longer stout middle hair 2 with many branches; and a short simple outer 

 hair (3). Prothoracic pleural group (9-12) of four hairs; hairs 9, 10, and 

 12 long, simple; hair 11 short, usually simple. Mesothoracic pleural group 

 (9-12) of four hairs; hairs 9 and 10 long, simple; hair 12 about one-third 

 the length of hair 9 or 10, simple; hair 11 minute, simple. Metathoracic pleural 

 group (9-12) of four hairs; hairs 9 and 10 long, simple; hair 12 short, 

 branched beyond base; hair 11 minute, simple. Metathoracic palmate (1) 

 small, with transparent leaflets. Abdomen: Submedian dorsal hair (0) well- 

 developed on segments IV and V, 4- to 9-branched; palmate hair (1) rudi- 

 mentary on segments I and II, well-developed and nearly equal in size 



