MEMOIRS OF THE NATIONAL ACADEMY OP SCIENCES. 193 



Oil ;» careful revision of the generic cliaracters of (Edeniasia 1 do not find any of suflicient 

 value to separate it from Schiznra. (E. concinna has all the adult cliaracters of Sehizura except 

 the style of coloration j the palpi of this species do not seem to be geuerically ditlereut from those 

 of the species usually referred to Sehizura. An examination of the figures illustrating the 

 A'enatioii of *s'. ipoiiwic and coiiciuna will show a general agreement in the ]>lan of venation. 



^Vhen we come to the larval characteristics it would seem nnrcasonablc to unite such a 

 peculiar species of larva as that of coneunui with the species of Sehizura as formerly limited by 

 us; but the same difticmlty is nuit with in Heterocampa. OSdemasia might be retained as a 

 subgenus or section of Sehizura, but at j)rescnt it seems best to at least unite the two genera. 

 Undoubtedly the old genus (Edemasia is partially evolved, and to some it may seem best ou 

 account of its larval characters to retain it as a distinct genus. Before this is done, however, 

 we ueed more exact knowledge of the larval histories of the subfamily. At all events, the 

 differences which separate the adult S. concinna from the other species of Sehizura are not at all 

 so marked as those which separate the other genera of the family as we have defined them. 



E<j(i. — Hemispherical, the siu'face marked with microscopic polygonal areas, becoming 

 obsolete toward the apex, so that it is smooth. 



Larva. — Head and bodj' somewhat compressed, head high, narrow, not so wide as the body. 

 The eighth to tenth abdominal segmeuts uplifted, with rather long aud slender anal legs, a high 

 nutant, slightly eversible, forked dorsal tubercle on the first alidominnl segment; two high twin 

 fleshy tubercles on fifth abdominal segment, not quite so large as similar ones ou the eighth 

 segment. Colors green ou sides of the thoracic segments ; the rest of the body russet, with fine, 

 irregular, reddish lines, and a characteristic silvery white dorsal V-shaped mark in front of the 

 last tubercle. In S. concinna the entire first abdominal segment is swollen and red, while the 

 piliferous warts are converted into long, solid, black, stout, blunt sjiiues. 



Frcshli/ hatched larva. — Head very large, rounded; body studded with large piliferous conical 

 dorsal warts, those ou the prothoracic segments as large as those ou the first and eighth 

 abdominal segments, and those on the other segments large aud well developed. 



The glandular hairs long and bulbous at the tips. Body pale greenish yellow, with a pale 

 reddish band around the prothoracic and first, third, aud eighth abdominal segments. 



Cocoon. — A regularly oval earthen or thin silken web, with bits of leaves, etc., on the outside. 



Phjui. — Moderately stout, end of abdomen obtuse; the cremaster with the spine deei>ly cleft, 

 each fork well developed, rather long, not much flattened, ending in a point aud throwing off 

 near the end a short branch which nearly meets its fellow on the opposite fork. 



Geographical dlstrlbutiun. — The species range throughout the Appalachian, Campestrian, and 

 Austroriijarian subprovinces, but are most numerous in the Apj)alachian and Austroriparian 

 subprovinces. No species have yet been found in Mexico. 



SYNOPSIS OF THE SPECIES. 



A. Discal spot linear. Transverse lines more or less distinct. 



Fore wings with pointed apex; more or less distinct transverse lines; a linear dark discal spot inclosed 

 in a pale patch; no reddi.sh brown markings; largest species of the genus S. ipomece. 



No transverse lines; linear spot distinct; fore wings pointed at apex, whitish frosty gray, with no reddish 

 or lirowu lines and shades, except a I'aint extradiscal line; a hollow hlack low triangular mark on end 

 of thorax >S'. leptinoulea 



Size of markings of unicornis; fore wings more pointed; light brown with whitish scales, no greenish 

 yellow scales; cross lines distinct; Innate discal mark very distinct S. apicalia 



Fore wings squarish at apex ; markings white, reddish, black and brown, distinct, and cross lines distinct, 

 the middle aud extradiscal lines consisting of reddish brown lunules; two black subapical slashes, a 

 short white longitudinal streak in the second median interspace S. unicornis 



Shape of uiiiiontis, wings sligl)tly broader, thorax very dark brown, fore wings reddish, and a broad 

 longitudinal reddish shade beyond the distinct linear discal mark .S. h:((iia 



Fore wings grayish white, with a fawn-colored shade along internal margin S.pernni/uhaa 



B. Discal spot, a small round black dot; no transverse lines. 



Closely resembling concinna, but larger, and fore wings mucli more produced toward apex; oblique 

 dark costal bands S. eximia 



Fore wings squarish at apex ; tawny ashen, with reddish brown patches; thorax pale ash; no tran.sverse 

 lines, aud costal bands obsolete -S. concinna 



S. Mis. 50 13 



