(V.) 



mtvis arc a little! similcd, cxiKiiidiiig rntiii 1.40 to 1.1;") iiiclic-^. 'V\'.('y iiiircc, 

 witii spcciiucns iVom Icclaiul as to gciioral a|)i)cai"aii<(; and .-^i/c, but an; not 

 quite so dark, and have more golden-vellow specks. I liavn seen no .';|)eci- 

 mciis iVom this country or Lal)rador wilii snch ch'ar niarkinijs as in tliosc 

 receiv,-d Ironi the Anstrian Alps, thoniiii tli(,' American specimens are rnl)l)ed. 

 Ill size, the Colorado iiidividnals resemlde tiie I'>nropean onc^s. 



Larva. — " The eijir is laid on the sUmkUm' stalks ol'the wort, \vhortlel)errv, 

 or l)ilherry {Vacclnium Vilis-ldccn) in Jnly and Ani,oist, and the young 

 caterpillar emerges in about twelve <lays, but soon liyl)ernates on the sur- 

 face of the (>arth, at the roots of the food-plant. It begins to teed again 

 in April of the ensuin^r year, and is fnll-fcd by the .second week in ]\Iay. 

 It then rests on the stalk of its food-plant iiy da\', generally with the 

 head downward, and in a i)ert"ectly straight position. On the approach 

 of evening, it turns round, re-aseends tlie stalk, and feeds on the leaves 

 during the niyht. AVhen full-ifrown, tin; head is prone, scarcely so w'uW, 

 as the second segment, and witliout any ma.nifest notch on the crown. The 

 body is of uniform suljstance thron;i;hoiil, and liaving a perceptil)le lateral 

 skin-fold along the region of the spiracles; each segment has a few small 

 warts, and each wart emits a short and fbel)le l)ristle. The color of tin; head 

 is umber-brown, in some specimens inclining to red. Tlie body is velvety 

 icd-brown or velvety olive-green. In both varieties, there; is a series of medio- 

 dorsal, V-shaped markings, of great Ijeauty. These occur on the filth, si.\tli, 

 seventh, eighth, ninth, tenth, and eleventh segment.s. The apex of each mark 

 points toward the head. The sides of these marks are not (piite closed at this 

 jioint, but allow the passage of a fawn-colored stripe, which expands immedi- 

 ately afl(!r entering the area enclosed by the V, and is again restricted to a 

 mere line, where it approaches the I)oundary of the .segment. The remainder 

 of the area enclosed by the V is of a lovely rose-color. Each side of the V is 

 bordered with rich brown. Anterior to each V — that is, adjoining the anterior 

 margin of each segment — are four short, parallel lines, pale in the brown 

 variety, perfectly white in the green one. The lateral skin-l()ld in l)oth 

 varieties is almost white, and thrown up in bnld reli(,'f by contrast with the 

 ground-color immediately adjoining it. Tin' Ijelly is ol'the prevalent ground- 

 color. The legs are semi-trans])arent and pinkisli ; the claspers of the pre- 

 vailing: <rround color. It spins a sli<rht cocoon among the leaves ol its food- 

 plant, and changes to a chrysalis in .May.'' — Xewmuns British Mollii-, p. 110. 



b 



