178 American Midland Naturalist Monograph No. 3 



narrow margin of pale scales apically; sixth tergite mostly pale scaled, seventh 

 entirely pale scaled. Venter yellowish-white scaled. Legs: Femora and tibiae 

 brown scaled, yellowish on inner surface; knee joints pale. Tarsi usually darker, 

 with first segment often streaked on one side with pale scales; each segment of 

 hind tarsus with a narrow basal pale ring; fore- and mid-tarsi similarly marked 

 but with basal rings of segments 4 and 5 much reduced or lacking. Wing: 

 Scales rather narrow, brown. 



adult male. — Coloration similar to that of female, terminalia (Fig. 

 92). Lobes of ninth tergite (IXT-L) about as long as broad, usually separ- 

 ated by a little more than the width of one lobe, each bearing several short 

 spines. Tenth sternite (X-S) prominent, heavily sclerotized beyond middle. 

 Phallosome (Ph) cylindrical, about twice as long as broad, rounded apically, 

 open ventrally, closed dorsally. Claspette stem (Cl-S) pilose, curved, rather 

 slender, extending a little beyond basal lobe; claspette filament (Cl-F) more 

 than one and one-half times as long as stem, slender, curved, sharply pointed, 

 with a blade-like expansion medially on the convex side. Basistyle (Bs) about 

 three and one-half times as long as width across middle, bluntly rounded at 

 apex, clothed with scales and long setae (setae very numerous and long on 

 inner ventral margin) ; basal lobe (B-L) short, bluntly conical, bearing a stout 

 recurved spine subapically on dorsal side and numerous short and two or three 

 rather long setae apically; apical lobe (A-L) rounded, prominent, clothed with 

 a few short setae. Dististyle (Ds) about two-thirds as long as basistyle, a little 

 broader medially; terminal claw (Ds-C) slender, approximately one-fourth as 

 long as dististyle. 



LARVA. (Fig. 93). — Head broader than long. Antenna shorter than head, 

 spinose; antennal tuft multiple, finely barbed, inserted before middle of shaft, 

 reaching nearly to tip. Inner preclypeal spines darkly pigmented, not separated 

 by more than the length of one spine. Head hairs: Preantennal (A) large, 

 multiple, barbed; lower (B) and upper (C) rather large, multiple, smooth or 

 weakly barbed (hairs A, B, and C not inserted in a straight line) ; postclypeal 

 (d) small, usually 3-branched; sutural (e), trans-sutural (f), and supraorbital 

 small, usually double. Upper lateral abdominal hairs on segments I to V 

 double, occasionally triple. Comb of eighth segment of many scales in a patch; 

 individual scale fringed laterally with small spinules and apically with a few 

 larger subequal spines, the middle spine somewhat longer and stouter. Siphon 

 about two and one-half times as long as wide; pecten of numerous evenly 

 spaced teeth, not reaching middle of siphon; subventral tuft multiple, barbed, 

 inserted beyond pecten. Anal segment longer than wide, with dorsal plate 

 reaching about two-thirds of the way down the sides; lateral hair single; dorsal 

 brush consisting of a long lower caudal hair and a shorter multiple upper 

 caudal tuft on either side; ventral brush well-developed, with about two short 

 tufts preceding the barred area; gills 4, variable in length, but generally very 

 short and bud-like. 



distribution. — Occurs along the Atlantic Coast, from Virginia to Canada. 

 Southern States: Virginia (49). Other States: Connecticut (52); Delaware 

 (106); Maine (52); Maryland (19); Massachusetts (52); New Hampshire 



