MEMOIES OF THE J^ATIOISTAL ACADEMY OF SCIENCES. 193 



On a careful revision of the generic cliaracters of (Tidemasia I do not flud any of sufficient 

 value to separate it from Scliizura. (E. concinna lias all the adult characters of Schizura except 

 the style of coloration, the palpi of this si>ecies do not seem to be geuerically different from those 

 of tli(\ species usually referred to Schizura. An examination of the figures illustrating the 

 venation of S. ipomecv and concinna will show a general agreement in the plan of venation. 



When we come to the larval characteristics it would seem unreasonable to unite such a 

 peculiar species of larva as that of concinna with the species of Schizura as formerly limited by 

 us; but the same difficulty is met with in Heterocamj)a. (Edemasia might be retained as a 

 subgenus or section of Schizura, but at iiresent 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 on 

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

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

 differences which separate the adult 8. concinna from the other species of Schizura are not at all 

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



tJog. — Hemispherical, the surface marked with microscopic polygonal areas, becoming 

 obsolete toward the apex, so that it is smooth. 



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

 The eighth to tenth abdominal segments uplifted, with rather long and slender anal legs, a high 

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

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

 segment. Colors green on 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 

 l)iliferous warts are converted into long, solid, black, stout, blunt spines. 



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

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

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



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

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



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



Pupa. — Moderately stout, end of abdomen obtuse; the creniaster with the spine deeply cleft, 

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

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



Geofiraphical (lisfrihufion. — The species range throughout the Appalachian, Campestrian, and 

 Austroriparian subprovinces, but are most numerous in the A2)palachian 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 reddish hrown m,arlvings; largest species of the genus <S. ipomcK 



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

 or hrowu lines and shades, except a faint extradiscal line ; a hollow black low triangular mark on end 

 of thorax j^. leptinoidfs 



Size of markings of iiiiicornis; fore wings more jiointed; light brown with whitish scales, no greenish 

 yellow scales; cross lines distinct; lunate discal nuirk very distinct S. apicalis 



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

 the middle and extradiscal lines consisting of reddish brown lunules; two black subaplcal slashes, a 

 short white longitudinal streal< in the second median interspace S. unicornis 



Shape of idiicorjiis, wings sliglitly broader, thorax very dark brown, fore wings reddish, and a broad 

 longitudinal reddish shade beyond the distinct linear discal marli S. hailia 



Fore wings grayish white, with a fawn-colored shade along internal margin .S'.jjero »//«/«(« 



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 & eximia 



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



linos, and costal bands obsolete 5. concinna 



S. Mis. 50 13 



