MEMOIRS OF THE KATIOXAL ACADEMY OF SCIEIS^CES. 
225 
From tlie inspection of the figure by Donbleclay (probably copied from Abbot’s colored 
drawing) of the larva of Loclmwm manteo Doubleday, I feel sure that lleterocampa suhalbicans 
Grote is a synonym. Indeed, it has been referred with a doubt by Mr. Grote to his species. 
I am indebted to Professor Riley for an opportunity of examining* and describing a series in 
alcohol of the larvm in all the live stages (Yo. 2759 from box 12, 155), and have myself collected 
the caterpillar in its last two stages, while Professor Riley has given me a blown specimen and 
the opportunity of examining his own series. 
Larva^ Stage I, — Length, 4-G mm. The head is very large, nearly twice as wide as the body, 
and flattened in front, the outline seen from in front being somewhat six-sided. Tiiere are six to 
seven minute piliferous warts, tlie black setne arising from them being unusually large and stiff, and 
tapering at the end; around the base of the warts are brown discolorations, and the row of warts 
on each side of the median line, together with the outer i‘ow, are connected by an irregular, faint, 
brownish band. 
The body narrows in width to the end. The dorsal and lateral tubercles are well developed, 
the dorsal ones being quite high, but on the whole rather small and all of the same shape; those 
on the prothoracic and first abdominal segments arc of about the same size, and only a little larger 
than those on the second and tim'd segments; the two dorsal ones on the eighth abdominal 
segment are of the same size as those on the first abdominal segment, but are nearer together and 
with somewhat larger bases. The ninth and tenth segments are rather long, with well developed 
tubei'cles. The supra-anal plate is well developed, being rounded, not so long as broad, bearing 
on the edge eight hairs, of which the two posterior ones are bristle-like and black; near the middle 
of the plate are two black doi'sal bristles. The paranal lobes are large and full, each bearing an 
excremeutiferal bristle. The anal legs are long and slender, being as long as the ninth segment, 
and are slightly retractile. The four anterior pairs of abdominal legs bear on the plautm from 
sixteen to eighteen cimchots. Tlie setm arising from the dorsal and lateral tubercles are long and 
large, and though apparently tubular, taper, some to a iioint, while others are slightly docked, 
but they do not, as usual, end in a broad clear tip. But along the extreme lower side of the fust 
and second and seventh and eighth abdominal segments is a series of singular battledoor-like 
setic, a iiair to each of the segments named, and arising from the lowest tubercle on the side of the 
segment. 
These battledoor hairs, which are modified secretory setm, are very short, only from one-thii*d 
to one-half as long as the other sette, and have a slender pedicel enlarging into an elongate 
bulbous expansion, the surface of which is striated or wrinkled longitudinally, while the ti]) 
appears under a half inch objective to be clear. There is also a pair of remarkable foliaceous 
oval appendages at the end of the thoracic legs, which we have not seen in the few other larva 
whose feet Ave have si)ecially examined. Tliese are described and figured in our paper on the 
“External structure of caterpillars.”' 
The colors, being Avell preserved in the alcoholic specimens examined, may be described in 
the absence of the living. The head is amber, mixed with resinous. The body is whitish above; 
the tubercles and their bases pale straw-yellow, as are tho anal region and anal legs; the setie 
are brownish, and there are pinkish stains at the base of the prothoracic and first and eighth 
abdominal dorsal tubercles. Hence it seems that in the first stage of this species the mode of 
coloration of the final stage (V) is already indicated. 
Seeond stage, — Length, 10-11 mm. The head is now proportionately smaller than befime, the 
dark spots more exaggerated, and the twin dorsal tubercles on the prothoracic and first and eighth 
abdominal segments, while not much larger than tlie others, are much darker reddish brown, with 
pink stains around their bases, and thus contrast with the others, which are yellow. The two 
douhle dorsal pink lines, connecting the prothoracic and first abdominal tubercles, also the fimr 
short lines in front of and behind the tubercles on the eighth segment, are now distinct; also the 
snbdorsal, white, lateral band on the outer side of the dorsal tubercles, while the subsi)iraciilar, 
narroAV, pale yellow line is distinct. The stigmata on the eighth abdominal segment is twice as 
large as the others. Tho hairs are very long, black, and tapering, I can not see any battledoor 
setic ill this stage. The anal legs are provided with crochets. 
S. Mis. 50 
15 
Proceedings Post. vSoc. Nat. Hist., 1890. 
