48 
In coloration this larva is somewhat suggestive of the common cab- 
bage looper, Plusia brassicw, but the form is entirely different, being 
much more slender, and although the species is a semi-looper, like 
Plusia, it is not at all likely to be mistaken for it. The colors are 
somewhat more constant in the several stages. 
The penultimate stage.—The larva is green and white striped and is 
in its most characteristic colors when in the penultimate stage, as it 
loses its striation to a great extent when fully matured. The general 
color is clear, translucent green, a shade or two lighter than the bean 
or other leguminous leaves upon which it feeds. It is about ten times 
as long as wide and segmentation is well marked. The body is widest 
about the middle, tapering gradually toward each end, the last seg- 
ments being narrowest. The head is of nearly the same color as the 
remainder of the body, a trifle lighter and less translucent. The entire 
surface of the body is sparsely covered with long, slender, and dark 
brown hairs. The piliferous warts project above the surface, but 
otherwise are not noticeable, being only a very little lighter in color 
than the body. The thoracic legs are nearly the same color as the 
head. There are only three abdominal prolegs. The anal prolegs are 
long and project well beyond the last segment. There are six white 
stripes on the body which alternate with the general green. ‘The green 
dorsal line is a little darker than the general color of the body. There 
isa rather wide white stripe each side, a latero-dorsal narrow white 
stripe, and a broader irregular lateral stripe. The prothoracic folds 
are strongly pronounced, particularly in the region of the legs; abdom- 
inal folds also pronounced. Length in this stage, 20-24"™; width, 
2.4—-2.6™™. 
Last larval stage.—After the final molt the larva usually loses to a 
ereat extent its striated appearance and becomes nearly uniform paler 
green in color as well as stouter. The head is sometimes somewhat 
yellowish, as is also the first thoracic segment. The ocelli are twelve 
in number, arranged at the sides of the head in three pairs, as shown 
in the figure at ¢. 
In alcohol the larva loses its color, being apt to be turned black 
unless first boiled in water, when the color becomes milk white. Length 
at maturity, 25-29""; width, 2.8-3.0". 
The penultimate stage is figured because, as previously remarked, 
more characteristic of the species than the final stage before pupation. 
THE PUPA AND COCOON. 
The pupa.—The pupa is dark brown and presents rather good char- 
acters for description, but as this stage has previously been very fully 
characterized by Professor Comstock, in the report of this Depart- 
ment for 1879, his description is transcribed: 
Rather stout, dark mahogany-brown. Wing sheaths and crural sheaths closely 
soldered; the former obtuse}y rounded and extending to the end of the fifth abdom- 
