1890 .] 
543 
[Packard. 
As regards the second stage of this larva, the following notes on 
some alcoholic specimens, kindly loaned me by Professor Riley and 
collected by Mr. Bruner in Nebraska, may be of interest. 
Second stage .— -Length 6-7 mm. Head large, deeply indented 
on the vertex, each lobe bearing near the end a piliferous wart. 
The two dorsal piliferous tubercles, on each thoracic segment, are 
nearly of the same size, but those of the prothoracic pair are con- 
siderably larger than the mesothoracic, and the latter are larger 
than the metathoracic pair. The tubercles on the first abdominal 
segments are a little larger than those on the prothoracic segment. 
Those on the eighth abdominal segment are as large at the base, 
but not so high as those on the first abdominal segment ; and those 
on the ninth segment are quite large, being about two-thirds as 
large as those on the eighth abdominal segment. All the setae aris- 
ing from the dorsal and lateral tubercles are decidedly clavate at 
the end. 
Compared with Schizura ipomeoe of the same stage and size, the 
head of Janassa is seen to be larger, and the lobes above more point- 
ed. The shape and proportions of the thoracic and abdominal seg- 
ments are nearly the same, but the paddle-shaped setae are shorter, 
while the body, generally, is stouter. At this stage, the two larvae 
appear to be scarcely generically distinct. 
Last stage. — Mr. Dyar has quite fully described this stage, but 
there are some structural features to which we would call attention. 
The head is distinctly bilobed, with no warts, but a bristle on each 
side of the vertex. The markings of the head have been well de- 
scribed by Mr. Dyar. From the first abdominal segment arises a 
large, double tubercle, undoubtedly movable as in Schizura and 
serving to frighten away parasitic insects. From the hump arise 
two dark, smooth tubercles, which are directed forwards and give 
rise each to a bristle. 
On the eighth abdominal segment, where the spiracles are nearly 
twice as large as the others on the abdomen, is a decided hump, 
bearing two small, piliferous warts. The anal legs and end of the 
body are much as in Schizura, being raised at times. 
The larva closely approaches those of the species of Schizura, 
having essentially the same style of coloration and the same ar- 
rangement of terrifying humps and tubercles, but not the peculiar 
Y-shaped dorsal marks of Schizura. The markings of the moths 
are quite different, and while the two genera are quite distinct, 
