1490 THE BUTTERFLIES OF NEW ENGLAND. 



THANAOS TERENTIUS.— Terence's dusky wing. 



Nisoniades terentius Seiuld.-Burg., Proe. Nisoniades ovidius Scudii.-Burg., Proc. 



Bost. soe. nat. hist., xiii: 292-293, figs. 6u, 1, Bost. soc. n.it. hist., xiii: 293, fig. 8u, 1, r 



r, lb, rb (1870). (1870). 



Erynnis terentius Scudd., Syst. rev. Amer. Ttidnaos juvenalis pars Streck., Cat. amer. 



butt., 51 (1872). macrolup., 177 (1878). 



Each oil his reed astride, the Cherulj-traiii 

 Watch her kind looks, and circle o'er the plain; 

 Now with young wonder touch the sliding snail, 

 Admire his eye-tipp'd horns, and painted mail ; 

 Chase with quick step, and eager arms outspread. 

 The pausing Butterfly from mead to mead. 



Darwin. — The botanic garden. 



Imago (9 :15). Head covered pretty uniformly with rather dark, gray brown scales 

 and hairs, the eye encli'cled, excepting iu front, with slightly paler scales which iu a slen- 

 der space above, and occasionally below, become whitish ; tuft of hairs outside the an- 

 tennae black. Palpi griseous, the dark, gray brown hairs of which it is composed, and 

 which grow darker toward the distal end of the palpi, being pale-tipped ; a few 

 longer black liairs are intermingled; the palpi are darker above tlian below, more sel- 

 dom or less conspicuously pale-tipped, and the terminal joint is nearly uniform dark 

 gray-brown. Antennae dark purplisli brown, darker anteriorly than above, posteriorly 

 heavily flecked with silvery white, or gray, especially on the base of the joints, and 

 whicli cover the face of the club with a uniform tint; all the joints of the stalk are 

 marked narrowly but distinctly with silvery white anteriorly, but it seldom encroaches 

 on the upper surface; beneath, the whole club is blackish castaueons, excepting at the 

 extreme base and on the apical joint, where it is castaneous. 



Thorax covered above with blackish brown hairs, beneath with grayish brown, often 

 purplish tinged, pale-tipped hairs. Legs dull purplish brown, more or less flecked 

 with pale or grayish white scales along the inner side, especially on the tarsi, and 

 occasion.ally in a le.ss degree at the tip of the femora extern.ally; tarsi beneath dull 

 castaneous; spurs dull brown, flecked with gray, minutely reddish tipped; spines dull 

 reddish luteous; claws dingy red, darker toward tip; pad dusky. 



Wings above blackish, the hind wings scarcely lighter than the fore wings. Fore 

 wings furnished with very small vitreous spots : one, scarcely more than a dot and often 

 pale instead of vitreous, is found in the cell next the base of the second superior sub- 

 costal nervule; the others form a broken series, the upper portion of which consists 

 of four minute but distinct spots, in successive interspaces Ijelow the second superior 

 subcostal nervule, the lowest sometimes nearly obsolete, but generally transverse and 

 situated next or even beyond the outer limits of the series which depends from the 

 middle of the outer two-fifths of the costal margin, in the direction of the middle of 

 the outer margin ; the three other spots are generally longitudinal dashes, sometimes 

 quadrate, tiie middle usually the largest; the lower portion of the complete series con- 

 sists of two spots iu the median interspaces, the lower usually obsolete, and when 

 present a mere dot or transverse streak, the upper very small and round in the middle 

 of the basal two-thirds of the interspace ; occasionally a single dot occurs also in the 

 lowest subcostal interspace. The wing is almost entirely blackish, blotclied very 

 slightly, iri'egularly and very oljscurely on the basal half with scarcely lighter shades. 

 A distinct, but ill-defined, large, roundish patch, reaching from close to the costal 

 border to tlie bottom of the cell and from the cellular vitreous spot close to the other 

 vitreous spots, is of a considerably paler cinereous, especially in the ? , often tinged 

 very slightly with rosaceous ; similar tints, less frequently rosaceous, cloud the outer 

 margin excepting at extreme tip and make zigzag transverse streaks before the middle 

 of the medio-submedian interspace; the former intensify the generic markings, leaving 

 in their midst a luuulate outer border to an othenvise nearly indistinguishable extra 



