colored form, but also the slate-colored form from larvse hatched 
from eggs laid by the orange form. Over two hundred specimens 
reared from larvae received in August and produced by the second 
brood of orange moths were all referable to the slate-colored form. 
In fact all the moths which issued after September 23 were of 
this form, though there was but a difference of five days between 
the issuing of the last yellow and the first gray specimens the 
latter continuing to issue through October. Many of the g y 
specimens, especially those which first appear, are so suftui sed 
with orange or reddish scales as to appear somewhat intermediate 
between the two extremes, but there are. none which are not at 
once referable to. the gray form. It is, m fact, an interesting 
case of seasonal dimorphism.” 
In Bulletin No. 4 of the Division of Entomology of the U. S. De¬ 
partment of Agriculture (pp. 22-26) Mr. J B. Smith records a series 
of observations upon this species as a cranberry insect, describing it 
as “rather interesting ancf anomalous m that it has two dmt 
forms—a gray winter form and a summer yellow foim. . ' 
that the moths of the gray form, a few days after emerging, large y 
lose their red scales, which rub off very easily, and they appear the 
of a uniform gray slate-color.” According to his observations 
these moths emerge in October, hibernate as adults m crevices, 
outhouses and rubbish heaps,” and m the spring (April 15 to 
Mav 1) deposit their eggs. About a fortnight later the larvae hatch 
and^ eat the foliage. By May 24 the larvae had begun to pupate, 
in size than the gray specimens, and entirely different m color, 
being vellow, with ochreous mottlings. * * * On fresh specimens 
the ochreous or reddish scales are dense and give the insect a deeper 
color- worn specimens lack these scales and appear uniform y 
yellow The sexes do not differ in size, and none expand more, 
and many less, than 0.5 inches.” The second brood of larvae ap¬ 
peared late in June or early in July, and the moths produced by 
them, which are also uniformly yellow, emerge m August, t o l ay 
egcrs for the third brood, the moths of which, as before stated, 
emerge in October and are of the gray form. Mr. Smith states 
that he is perfectly positive that this gray brood is the result of 
the eggs laid by the yellow form, for not only were there no gray 
moths "on the bog to produce them, but I watched the yellow forms 
oviposit, obtained some eggs from females in confinement and s^t 
them to Washington to be reared, and Prof Eiley informs me 
that gray individuals were obtained from them He adds that 
Dr. Brake! ey, of New Jersey, had several years before come to the 
conclusion that the species is dimorphic. 
In the issue of the “Canadian Entomologist” for the same month 
of the same year (April, 1884, p. 64) Prof. Pernald states that he 
had examined a long series of the specimens bred by Dr._ Riley, and 
was surprised to find that “the orange forms were Tei as minida 
Robs, which was redescribed by Zeller as Terns vanolana. 
adds:’ “I have for several years past taken a Teras here m con- 
