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 PREPARATORY STAGES OF ARCTIA DOCTA Walk. 



HY HARRISON C. DYAR. 



Egg. — Conoidal, the base flat, smooth and shiny. Color pearly 

 white, or pale yellow. They are not fastened to a surface as is usual, 

 but appear to be laid loosely, perhaps some adhering together. 

 Before hatching, the orange-colored head of the included larva is 

 seen through the transparent shell at the summit of the egg and the 

 black larval hairs cur\'ed spirally around it. Duration of this stage 

 eight days. 



First Larval Stage. — The head and cervical spot are semi- 

 transparent pale orange, the eyes black. Body pale whitish, with 

 about eight warts per segment, blackish, producing long, white and 

 black hairs. Length 2 mm. Duration of this stage three days. 



.Second Larval Stage. — Head testaceous, but the eyes and 

 jaws brown. The body is similarl)^ colored with the head, but paler, 

 the warts large and blackish, bearing black hairs. Length about 

 4 mm. Duration of this stage three days. 



Third Larval Stage. — Head testaceous; the eyes, jaws and 

 two large spots on the vertex, blackish; a few hairs. Body brown, 

 the subdorsal .space nearly black, with a pale whitish dorsal line. 

 The black warts produce short black hairs and a few long pale ones. 

 Length of the larva 8 mm. Duration of this stage four days. 



Fourth Larval Stage. — Head black and shining. Body 

 ciark brown, nearly black dorsally, leaving a pale, interrupted, dorsal 

 stripe. Warts black, arranged as in the mature larva and producing 

 black hairs, with a few longer, paler ones. Feet black. Length 

 ID mm. Duration of this stage five days. 



Fifth Larval Stage. — Head black, but paler about mouth 

 and behind the eyes. Palpi pale. Body black, paler on the venter, 

 with an interrupted reddish dorsal line. The abdominal feet are 

 pale, and the spiracles reddish; otherwise as before. Length 15 

 mm. Duration of this stage eight days. 



Sixth Larval Stage. — Head black, slightly reddish centrally 

 and paler at the sides; the plates above the mouth are whitish; jaws 

 black, and palpi pale, with a b.lack ring, the last joint reddish. 

 Body velvety black with an interrupted dorsal red stripe absent on 

 joints 2, 3, 4 and 13, forming a row of eight red spots, rounded 

 posteriorly aud pointed anteriorly. Thoracic feet black; abdominal 

 black with the claspers pale brown. Hairs black, a few longer white 

 ones posteriorly while those from the subventral warts are tawny 

 reddish. The hairs are stifl" and spiny, about 5 mm. long and are 



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