FAMILY ZYG.ENID2E. 27 



is identical with that of the lower discal nervule, while the 

 course of the nervule in Alypia is much more flexuous. 



The abdomen in Alypia preserves the peculiar family form ; in 

 Eudryas however it is slenderer and gradually tapers towards 

 the pencilled tip. 



The Bombycid characters of Eudryas are found in the pecu- 

 liar squamation : i. e., in the thickly scaled thorax, the middle 

 of which is covered with the steel colored large and broad scales 

 which occur in the same place in Tolype, and it resembles He- 

 terocampa and Datana, near which the genus was placed by Dr. 

 Harris, who has given quite full details about the habits in his 

 descriptions of the two species E. grata and E. unio. 



Mr. F. W. Putnam has observed the larvae of E. grata feed- 

 ing on the grape vine in Bridport, Vt., and collected the larvae 

 and pupae in alcohol, which are in the Museum of Comparative 

 Zoology at Cambridge. The moth of E. unio has been collected 

 by a friend in Bangor, Maine. 



Dr. Eitch has raised the larvae of both species from the grape. 

 He says of E. unio* that it "is equally common with the pre- 

 ceeding, and the worms are so much alike that we as yet know 

 not whether there are any marks whereby they can be distin- 

 guished from each other." p. 899. 



Larva. The head is ofgood size, being three-fourths as 

 wide as the body. It is nearly as broad across the vertex, as 

 in front ; above it is rather deeply impressed by the median line. 

 The V-shaped epicranium is large not sunken below the level 

 of the front; its apex is rather blunt, its sides bulge out 

 from the apex to the anterior third of its length, where it is 

 slightly contracted ; and when it joins the clypeus its edge is 

 linear. The short transverse clypeus is as broad as the epicrani- 

 um is long, its front edge being straight and very slightly raised. 



The labrum is divided half of its length by a sinus, into two 

 lobes which are farther sub divided into two portions, the outer 

 corneous and hard, and shaped somewhat like the mandible of 

 the mature moths of this family, while the inner portions meet 

 on the median line, and are more fleshy. 



The two jointed antennae are placed directly opposite the 

 thick sub triangular truncated mandibles. 



*Third Report Insects N. Y. 1856. 



