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colored form, but also the slate-colored form from larvae 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 gray 

 specimens, especially those which first appear, are so suffused 

 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, in 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 and anomalous in that it has two distinct 

 forms — a gray winter form and a summer yellow form." He states 

 that the moths of the gray form, a few days after emerging," largely 

 lose their red scales, which rub off very easily, and they appear then 

 of a uniform gray slate-color." According to his- observations 

 these moths emerge in October, hibernate as adults in "crevices, 

 outhouses, and rubbish heaps," and in the spring (April 15 to 

 May 1 ) deposit their eggs. About a fortnight later the larvae hatch 

 and eat the foliage. By May 24 the larvae had begun to pupate, 

 and the first moths emerged June 4. "These moths were smaller 

 in size than the gray specimens, and entirely different in color, 

 being yellow, 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 uniformly 

 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 in August, to lay 

 eggs 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 sent 

 them to Washington to be reared, and Prof. Eiley informs me 

 that gray individuals were obtained from them." He adds that 

 Dr. Brakeley, 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. Fernald 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 Teras minida 

 Robs., which was redescribed by Zeller as Teras variolana.'' He 

 adds: "I have for several years past taken a Teras here in con- 



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