83 



This genus is easily distinguished by the antennas being sometimes 

 pectinated (E. cambricaria and E. 12-lineata); by the bulging front, darker 

 than the rest of the head; by the feeble, slender palpi not reaching the front ; 

 as well as by the broad, short, triangular wings. In all these characters, 

 except the antennae, which are sometimes pectinated in Glaucopteryx, it 

 differs from the latter genus, though closely like it in venation. 



Larva. — " Rather short, a little flattened, velvety green, with the ventral 

 region white or glaucous; head small and globular; living exposed on trees. 

 Pupa subterranean." — Gruenee. E. cambricaria appears by Newman's state- 

 ment to remain in leaves in the pupa state. 



It is singular how constantly E. cambricaria has been separated gen- 

 etically from E. dilutata ; though, according to Lcderer, it was regarded by 

 Standfuss as a variety of E. dilutata. Why Curtis separated it from "Opora- 

 bia' 1 does not seem plain, as he remarks that "it is doubtful whether it may 

 not be necessary to remove Oporabia to the genus before us." He then 

 compares E. (his Venusia) cambrica with E. dilutata and E. multistrigaria. E. 

 cambricaria is so close to E. dilutata that I had regarded it as a variety of 

 that species, and referred to it under that name in Hayden's Report for 1874. 



There seems no good reason why Hubner's name Epirrita should not be 

 restored, though he ignored it in his Verzeichniss and used Oporinia instead. 



Synopsis of the Species. 



Very small, with broad, diffuse Hues, or, when a little rubbed, about twelve lines on the fore 



wings ; four lines on under side of hind wings E. perlineata. 



Like 0. perlineata, with twelve fine lines on the fore wings E. 12-lineata. 



Nearly twice as large as the preceding, with a well-marked, black V on the origin of the 



first and second median venules ; antennae pectinated E. cambricaria. 



Larger than E. cambricaria, with similar markings ; antennae simple E. dilutata. 



Epirrita perlineata Packard. Plate 8, fig. 25, 68. 



Larentia perlineata Pack., Proc. Bost. S. N. H., xvi, 19, 1874. 



5 (?, 5 ?. — Closely resembling, in size, shape, and markings of wings, 

 E. 12-lineata. The head is whitish-gray above, in front dark-brown ; 

 the palpi brown at tips above. Antennas simple. The fore wings are 

 white, crossed by numerous wavy, fine lines, about twelve in number. It 

 differs chiefly from E. 12-lineata, however, in the median line being much 

 broader and more distinct, and with a broad ochreous shade between it and 

 the line beyond. The hind wings are white, with the scalloped lines on the 



