MEMOIRS OF THE XATIOXAL ACADEMY OF SCIENCES. 
243 
111 var. hriinnea the fore wings are suffased with reddish brown, and thei'e is a distinct reddish 
brown xiatch beyond the discal mark, with less white in the usually white oblique subapical patch,. 
In var. trouvelotii^ a large female expanding 55 mm., there is an olive tinge to the fore wings, 
but within the inner line are three brown patches, while the middle of the wing is clear olive-gTay ; 
beyond the discal mark the wing is tawny-brown. It is near the normal H, obliqtia, but much 
larger, and olive-gray instead of brownish gray, rendering the markings more distinct 5 the hind 
wings are smoky gray. 
Fia. 85.— Early stages of Heterocampa ohKqua and H. guttivitta. — I. Heterocanipn ahliqua. Froshly-hatcUodlarvaj; la. dorsal viovv; 
/6, spine on third; 7c, spine on eighth; /d, spine on ninth abdominal segment; /c, prothoracic horns of stage I. enlarged. JT. Helerocampa 
ohliqua. Stage II; 77a, horns on first prothoracio segment. III. Ueterocampa guUivxita. Horns in stage I; a, prothoracic horn; h.om 
on second abdominal; c.one on third to fifth, and d, on ninth abdominal segment. (The setie are in some cases in 7and 7a by oversight omitted.) 
The type was from Medford, Mass., and was collected duly 10 by Mr. L. Trouvelot, and is now 
ill the Museum of Comparative Zoology, Cambridge, Mass., where is also the type of iZ. obliqua^. 
uormal form.. 
The eggs of this Heterocampa were received from Providence, through the kindness of Mr. 
W. Dearden, July 13, and hatched at Brunswick, Me., July 20-31. It feeds on the oak. 
