GRAPTA I. 



GRAPTA INTERROGATIONIS, 1-5. 



Grapta Fnlerrogalionis, Fabricius. 



Form Fabricii, Edw., But. N. A., I, pi. 39, p. 115. 1872 ; Scudder, But. N. E., I, p. 319. 1889. 

 Form U.MBROSA, Liiitner ; Edw. 1. c, I, pi. 38, p. 111. 1S72; Scudder, 1. c. 1889. 



The preparatory stages of this species were but imperfectly described in Vol. 

 I, and therefore I now give thera fully. 



Egg. — Conoidal, the base flattened and rounded ; marked by from eight to 

 eleven thin vertical ribs, which near the base are low, but from about the middle 

 begin to rise, increa.sing gradually, and terminate around the rim of the summit 

 with an incurved slope ; these ribs have their sides scooped in grooves ^^erpen- 

 dicular to the surface, the grooves enlarging as the rib deepens ; micropyle in 

 centre of a rosette of six minute pentagonal cells, outside of which are two and 

 partly three rings of larger cells, irregularly five-sided; color pale green. Dura- 

 tion of this stage three to four days in summer, in April and May about ten 

 days, depending on the weather. (Figs, a to a*.) (The egg of Umhrosa, Fig. h. 

 pi. 38, Vol. I, is not good, nor even of proper shape, though drawn by so excel- 

 lent an artist as Mr. Konopicky.) 



Young Larva. — Length, at 24 hours from egg, .1 inch; cylindrical, even 

 from 2 to middle, then tapering .slightly to end, the dorsum falling rapidly on 

 the last segments ; on 2 is an oval chitinous patch on which are eight tubercles, 

 four on either side the mid-dorsal line, three in front, and one behind and 

 between the upper pair, each with long, tapering black hair, turned forward 

 over the head ; on each segment from 3 to 13 are six conical tubercles, forming 

 as many longitudinal rows, three on either side, a dorsal, sub-dorsal, and lateral ; 

 on 3 and 4 they are nearly in cross line, the lower one on each and the cor- 

 responding one on 2 replaced by a pair of minute ones close together, on 2 a 

 little above the line ; but from 5 to 13 in triangle, the dorsal one standing on 

 the front ridge, the sub-dorsal on the rear, the lateral a little before the middle 



