420 LEPIDOPTERA. 



coons are very small, almost round, tough, and parchment- 

 like, and are fastened to the twigs of the plants on which 

 the insects live. The moths of some, if not of all, of the 

 Limaeodes make their escape by pushing oft' one end of the 

 cocoon, which separates like a little circular lid. 



The most common of these slug-caterpillars, in jMassa- 

 chusetts, live on walnut-trees. They come to their full 

 size in September and October, and then measure five eighths 

 of an inch in length, and rather more than three eighths 

 across the middle. The body is thick, and its outline nearly 

 diamond-shaped ; the back is a little hollowed, and the mid- 

 dle of eacji side rises to an obtuse angle ; it is of a green 

 color, with the elevated edges brown. The boat-like form 

 of this caterpillar induced me to name it Limaeodes Scaplia^ 

 the skiff Limaeodes, in my " Catalogue of the Insects of 

 jNIassachusetts." JNIy specimens generally died after they 

 had made their cocoons, and consequently the moth is mi- 

 known to me. 



The moth of a Limaeodes, called Cippus* (Fig. 207) by 

 Sir J. E. Smith, is sometimes found 



Fig. 207. 



in Massachusetts, from the middle of 

 1^ ^' " -"^^ j^^]y till the 10th of August. It is 

 of a reddish-brown color ; on each of 

 the fore wings there is a small dark 

 ' brown dot near the middle, and a broad 



wavy green band beginning at the base, and bending round 

 till it touches the front margin near the tip ; behind a deep 

 notch of this band, near the base of the wing, there is a 

 triangular tawny spot, and another smaller one near the 

 tip. The green band is sometimes broken into three tri- 

 angular green spots, the middle one of which is wanting 

 in some specimens. One half of the stalk of the antennge 

 of the male is doubly feathered beneath ; the remainder to 



* Probably not the trae Cippus of Fabricius, which is found in Surinam. 

 There is a figure of our species in Gu^rin's " Iconographie du Kcgne Animal," 

 where it is named Limaeodes Delphiiiii, but for what reason I know not, for it 

 does not live on the Delphinium or larkspur. 



