124 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



but sei)ai'ate. Palpi lais*'. long, ascending, appressed to the front below; second joint long» 

 L'ontinnous, pilose beneath: third joint small, jwinted, not very distinct from the second. 



Thorax with a conical wcll-inarked uieiliau crest, which sends off a spur backward, and a 

 slight ridge on each side. Wings: Primaries oblong, more than onelialf as broad as long; costa 

 convex to beyond the luiddle, thence ascending to the nptiirned ai)cx, which is slightly pointed; 

 outer margin a little bent, entire, nearly straight over halfway down, thence regularly rounded to 

 the internal angle. Venation: No subcostal cell ; the first three branches of the subcostal vein 

 turned abruptly uj) to the costa, and ending farther from the apex than in Gluphisia, Nadata, or 

 Datana. 



Hind wings broad, apex rounded, outer edge rounded, longer than the internal margin. 



Legs densely haiiy: fore legs densely hairy to the ungues. Abdomen with a long spreading 

 tuft on the upper side of the end, reaching beyond the genitals. 



Coloration: The species usually whitish ocherous, with oblique, in ])art dislocated, transverse 

 lines, two of these usually forming a distinct large V-shaped mark; a deep brown patch 

 extending from the vertex of the head between the antennie l)ack to the top of the crest; the 

 outer line on the costa very distinct silvery white, more or less obli(|ue and sometimes S-shaped; 

 beyond this mark is a subapical rust-red patch. 



The genus is readily identified by the broad front, the hairy eyes, the wellpectimited 

 antennie of both sexeij, the large palpi, and the unusually short and broad fore wings, which are 

 not falcate at the apex; also by the well-marked dark brown median crest on the thorax, and by 

 the laterally tufted tip of the abdomen. 



Eiifj. — Hemispherical, moderately high, with irregular meridional swollen portions and the 

 surface ornamented with polygonal areas inclosed by slightly thickened walls. 



Larva. — Body rather long, slightly flattened, ornamented with bright, usually yellow, and 

 dark stripes, and usually with two twin darlc dorsal tubercles on the tirst and eighth abdominal 

 segments, with numerous pale hairs. The tubercles (in apifaUs) obsolete, the body being smooth 

 but striped, as usual. In Stage I cylindrical, with fine hairs all tapering; with indications at the 

 end of the stage of lines and abdominal tubercles. 



CocooH. — Thin, irregular in shaiie, s])un between two leaves. 



i'«jjrt. — Body unusually thick, and full and blunt at the end, with a slender cylindrical 

 cremaster, ending in two broad stout upcurvcd tlattened liooks, each bearing four to five long seta-. 



Geoyruphkal disirihuiivH. — The species are common to the Atlantic and Pacilic coasts and 

 the intervening region, covering the Appalachian, Austroriparian, and Campestrian subprovinces. 

 Whether any extends into the Mexican (Sonoran) is doubtful. The genus is represented in 

 Europe and America by several species in each hennsphere, and does not occur in either Asia or 

 Africa, nor in the tropics. 



SYXcirslS OP THF, SI'KCIKS A.NU VAUIETIKS. 



A. Lines auastoiiiosiug; basal line dislocati'd on cubical veiu, not toothed; white eostal mark iibl]i|iie or 



more nearly straight. 



Basal line forming a sharp .angle; usually mouse colored /. apiialis 



Larger and paler than Eastern iipicalis var. omnia 



Pale, almost sordid white var. asiorUe 



I'ale pur]dish ; arms of V sinuous var bijiria 



J>argest ami palest si>ocies; white costal mark obli(]ue; apex of V formiug a looji; \w thoracic liand. 



/. iiionmla. 



.Smaller than incliisa : pale siibocherous; second, third, and fourlli lines much more sinuous than in 



(ipicalixor iiiclusa; subapical patch 2)alc ocherous; costal mark oblii|Ue, sinuous; lirown thoracic lian<l 



obscure /. siyit/osd 



Costal mark more ohlicjuc and distinct than in Hlriijoxa; no thoracic l>and var. Iiiriilciilu 



I'sually large; a white, nearly straight, costal mark; subapical patch ocherous /. iiiclidia 



Small, dark mouse-color; suba])ical jiatch rust-red var. ihitiwi 



Small, ])ale ocherous; subapical patch ocherous var. ptilla 



White <08tal mark oblique; subocherous, inner arm of V liruur, less sinuous var.Jocoad 



Xear apical in, jiale, linos subparallel, not anastomosing /. bnicci 



Unnsually dark, costal mark obscure var. mullnoma 



Smaller, basal lino bent and curved; subapical patch very obscure rar.utvthe 



B. Liui's nut anastomosing; V very narrow; white costal nuirk S-like f. iilhoKii/ma 



I'alcr subapical patch brown var. aixvijUui 



