24 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



small dark spine at each lateral angle and a similar spine on each side 

 equidistant from the meson and the hind margia. Metathorax about 

 one-third wider than the prothorax; metanotal plate indistinctly longi- 

 tudinally striate, beariQg a row of four small spines upon front margin 

 of which the inner two are the larger. Wings reach nearly to the tip 

 of the abdomen, at the middle about one-fourteenth as broad as 

 long, light brown, except basal fifth and apical fourth, which are 

 light gray. Spiues upon basal fifth almost colorless, remainder of 

 spines dark brown. Costal fringe of fore wings composed of slender 

 bristles intermixed with a row of shorter spines. Costa bears 21 to 

 23 spines; fore vein 9 to 10 placed as follows: A group of three or 

 four in transparent basal fifth, a group of three in second fourth, 

 beyond center of wing are two to four spines; it four, they stand 

 equidistant from second group of spiues and from each other; if three, 

 the first stands alone near the center of the wing, the other two near 

 the tip; if only two spines are present, they stand near the tip; hind 

 vein bears 14 to 20 spines regularly placed. Origia of the hind vein 

 indistinct, near middle of the second group of spines on the fore vein. 

 Hairs composmg hind fringe long, wavy, and dark colored. Legs 

 rather slender; fore femora very slightly thickened; all femora dark 

 brown; basal third of fore tibiae, basal half of middle tibiae and basal 

 two-thirds of hind tibice brown; remainder of tibiae and all tarsi yel- 

 lowish brown. Second segment of tarsi much longer than the first; 

 spines on inner side of hind tibiae medium in size, light colored. All 

 femora and tibiae clothed with fine hairs. All femora striate. 



Abdomen as wide as mesothorax, about two and one-half times as 

 long as wide; each dorsal plate of segments two to eight marked 

 near its anterior edge with a narrow transverse Ime of black which 

 disappears about the middle of the pleural plates. Normally the 

 segments of the abdomen overlap a little. Posterior edge of ninth 

 segment bears a circlet of ten spines, the dorsal three pairs being 

 long, rather dark brown, and conspicuous. Two smaller spines are 

 foimd upon the dorsam of this segment about midway between front 

 and liind margin, on each side somewhat nearer the lateral margin 

 than the meson. Tenth segment bears a circlet of six spines at the 

 tip, the four upon the dorsum being rather stout and conspicuous. 

 Tenth segment split open above. Dorsum of first abdominal seg- 

 ment cross striate. Sides of abdomen striate. Posterior margin of 

 each ventral segment two to seven bears a row of four small spines 

 directed caudad. On each pleural plate of segments two to eight 

 are 4 to 5 spines directed caudad, and increasing in strength caudally. 



Described from nine specimens. 



Food plant, Helianthus sp. 



Locality, Clarksville, Tennessee. 



