Studies on Life-hUtory of Bombycine 3Ioihs. 79 



shield bearing two transverse rows of piliferous warts. No middle 

 dorsal small twin warts on the thoracic segments.' 



A very dark almost black Arctian was found crawling in the city 

 of Providence September 26th, from which I reared a moth of this 

 species. I describe the larva as follows: — 



Full-grown larva. — Length 35-38 mm. Body dull smoky black, 

 with white spiracles. The hairs all black, except a dark reddish 

 tan-brown shade on the abdominal segments. The head is rather 

 small, black, the clypeus, antennae, and labrum, as well as mouth- 

 parts, pale greenish. The body is of the same general shape as that 

 of P. Isabella, but the hairs are not so stiff or dense. The body is 

 black, as are also the tubercles. The verticils are dense, composed 

 of hairs of uneven length, those on the back (dorsal and subdorsal) 

 of abdominal segments 3 to 7 are mostly dark reddish chestnut- 

 brown, almost blackish, mixed with black ones, but the lateral tuber- 

 cles all send off black hairs. Besides these there are a few very 

 long hairs, w-hich are grayish at the end, and these are a little more 

 numerous at both ends of the body, a few more arising from the last 

 three abdominal segments than from the three thoracic segments. 

 Suranal plate and sides of all the black abdominal legs speckled with 

 white granules like fine white sand (it does not brush off, and can't 

 be sand!) Under side of the body dark livid smoky black. The 

 thoracic legs are pitchy black, pale at the tip. A very richly colored 

 velvety-black, handsome caterpillar. 



The cocoon is unusually dark, being blackish-brown, while the 

 moth, a male, had the black spot on the under side of the base of 

 the forelegs unusually large ; otherwise it does not differ from typi- 

 cal specimens. 



A foxy-red larva of Spilosoma viryinica (Fabr.), — Head, includ- 

 ing the mouth-parts, amberi The body is livid black. No pale 

 lateral band is visible, but the sides of the body, including the 

 spiracles, are paler than above, and especially beneath. The spira- 

 cles are white. All the hairs are foxy reddish-brown, except those 



' Mr. Bridgliarn's drawing of 5. virginica, stage I, does not very well repre- 

 sent my larva, as in mine the head is wider than the body, dark chestnut, 

 and not as he represents it pale, with two darker spots. The warts are also 

 darker. The color of the body is good. Tiie shape of the prothoracic shield 

 differs, as in my larva it is crescentiform, not transversely oblong. Yet his 

 drawing is not that of H. cunea or A. viryo! I I am, of course, sure my moth 

 is virginica and not cunea. 



