BEUTENMULLER, MONOGRAPH OF THE SESIID^. 253 



Male—Head black, orbits of eyes pale ; palpi and collar rufous. Antennae rufous. Thorax 

 black brown, sometimes with the patagia rufous. Abdomen black, fourth to last segments rufous 

 behind, second and fourth segments with a yellow ring ; sometimes all the segments are banded ; 

 underside dull orange behind. Legs dull orange, femora black. Fore wings rich brown with a 

 violaceous reflection, orange at the extreme base. Underside washed with dull orange brown. 

 Hind wings opaque, brown, transparent basally and beyond the cell below the costa ; sometimes 

 transparent with discal mark and rather broad outer border, brown ; underside with a dull orange 

 tinge. 



Female. — Very similar to the male, but more robust, with the antennae simple, black above, 

 rufous below and at base and tips. 



Expanse : Male, 28 mm. ; female, 35-40 mm. 

 Habitat. — New York, New Jersey, Pennsylvania, Illinois. 



Types : Male and female. Coll. B. Neumoegen, Brooklyn Institute of Arts and Sciences. 

 Larva—" Normal (S. exitiosa), the epicranial lobes touching in a broad point ; clypeus bulging, 

 depressed at vertex, paraclypeal pieces small, narrowed centrally. Brown with large darker patches 

 on the sides, jaws, a band across between antennae and clypeal sutures black. Thorax somewhat 

 enlarged and flattened, abdominal segments prominent dorsally, incisures well marked. Annulets 

 moderate, the first the largest. Shields pale, the cervical cut by a dark curved line. Abdominal 

 feet with crochets 10 to 15 in a row. Tubercles obsolete ; setae fine, moderate."— (Dyar, MS.) 



Memythrus dollii van castaneus (Beuten.). 



Plate XXX, Fig. 5, Male, and Fig. 6, Female. 

 Sciapteron dollii "v 'ar. castaneum Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. IX, 1897, p. 213. 



Male and Female.— Tike the type form but the thorax and abdomen are bright chestnut brown, 

 instead of black brown. 



Expanse : Male, 30 mm. ; female, 40 mm. 



Habitat. — Kansas, Texas. 



Types : Two males. Coll. Hy. Edwards, Am. Mus. Nat. Hist. One female. Coll. B. Neu- 

 moegen, Brooklyn Inst. Arts and Sciences. 



In the larval stage this species lives in the solid wood of young poplars. 

 The moth is subject to variation. In some individuals the abdomen is banded 

 with yellow and the hind wings are transparent with the exception of the outer 

 margin. The variety castaneus is bright chestnut brown instead of dark brown 

 like the type form. 



Memythrus seminole (Neum.). 



Plate XXX, Fig. 22, Female. 

 Sciapteron seminole Neumoegen, Ent. News, Vol. V, 1894, p. 330. 



Female. — Head and eyes light brown ; palpi light brown with dark tips. Collar light brown 

 with reddish edge. Thorax brown with a yellow line on the patagia, and a transverse one of the 

 same color at the posterior edge of thorax. Abdomen light reddish brown, segments edged 

 with yellow ; the first three edged with black. Legs yellowish above, brown below, with reddish 

 brown hair. Fore wings chestnut brown with a yellow basal spot, a streak along the middle, and a 

 reddish tint along the inner margin. Fringes concolorous. Hind wings transparent, opalescent ; 

 costa, veins, discal mark, terminal lines, and fringes reddish brown. Underside of fore wings light 

 chestnut shading into reddish brown and a yellow basal area. 



