212 OMNCB IXFIDOPTEIU. 



■lotliflrd so as to exhibit a t>rkc«l »1iiii>p. ui»oii which tb«' «•>!« t.f llic Aft only are tetn. 

 The cucoom an* f.'rnit^ «»f silk Inlcnuixrd with froRUK-nt* «'f ''•■oJ and bark. The thry- 



jjlll.U nii ti..| i.,.t.liii! i.|...M tilt lark. 'I l;i- !ar\U- iVf.l m^oll IvaVCS. 



I'vcaju ALBIHIO.MI. ( I'luto XXXvIl, fig. 3 - 5.) 



WiiiRs lii-lli'Xid : i>rimarlcs cloudni ; mi. ii.>r margin ntarkrd with an elongated spot of 

 erfam-ctdor Icnuiiiatiuf; in the outer uuglr and d<>tlc<i ilightl) with Lruwn, trant- 

 rtTvly l>andetl with white, Iduck or dark l>rown : M-con<larit» ^»^'wn,niarginl•d with 

 a liRhtcr shade. Thorax «>!' tlu; male luindrd with two distinct black lines joined by 

 two short parallel coniuxting lines, IkIwiiu which there is a s^juiire jellow or cream- 

 evlore«l or light buff sjM.t. The thorax of the femaU- is ornaikented with ihrte crow- 

 bars : antenna:* setaceons, with a lerniinal enlargement. Antenna* of the male ? 

 Catiirpillah strijted ii]xm its l>ack with yellow and brown ; underside lake, and furnibhed 

 with three pair of legs an«l four pair of proplegs : it is half an inch long. It spins a 

 thin white web Utwcen the leaves late in autumn, and apin-ars early in the spring In 

 I>erfeet state, feeding ujkiu the leaves <»f the white and otlier oak trees. They are 

 gregarious when young. The cocot»u is J inch long, an<i has eight or nine 8<'giuents. 

 The larvieof this sjiecies fei-d ut times npnn the leaves of the oak, ami Siinietimw nearly 

 defoliate a tree when tlwy are numerous. An instance has fallen under my ol>servation, In 

 which a tree of this kiiKl was well nigh deprive*! of leaves by these insects for two or 

 ihree years in succession. 



El DRVAs GRATA. n\o<}nt/iitph. ( Plate xlvii, fig. 8.) 



Forewlngs jiiarly white ; l>asal half trimmed with purplish brown : outer margin widely 

 bordered with purpli>h brown, the inner edge of which is banded with olive, which 

 extends and widens uinni the jxisterii.r U)nier, forming near the middle a large patch : 

 exteriorly, ui>on the Ninler and near the edge, it is ornamented with a delicate bluinh 

 line. Hindwings a yellow buff, l«ordend U-hind with i>urpli>h brown, which does n<it 

 reach the outer angle, but extends along the Inner etlge : It b trimmed with silver- 

 gray cilia*. Beneath, the forewings are pale bnff, marked upon the basal half with 

 brown, but conlined to the costa, which terminates in two n>undi>h spots. Hindwings 

 paler yelhnv bnff, nn<l marked in the middle with a vinele brtiwn <|>ot. AUlomenbuff 

 br>wn, silky ; the rings are i«and»Hl with lighter, and terminated with a zone of the 

 lighter huff. 

 This Uautiful moth is rare here. I have taken it only in Berkvhire ( Massachusetts), 

 but It exists in colleclioos In Washington and Albany counties in this State. 



