Clje Canaiiim Entomologist. 



VOL. XIV. LONDON, ONT., NOVEMBER, 1882. No. 11 



DESCRIPTION OF THE PREPARATORY STAGES OF GRAPTA 



INTERROGATIONIS, Fab. 



BY W. H. EDWARDS, COALBURGH, W. VA. 



Egg. — Conoidal, the base flattened and rounded ; marked by 8 or 9 

 vertical ribs, which near the base are low, but on upper third are consider- 

 ably elevated, increase gradually in prominence and terminate abruptly 

 around a small flat space at summit ; these ribs are thin and their sides 

 are grooved perpendicular to the surface of the egg ; color pale green. 

 Duration of this stage from 3 to 4 days in summer, in April and early May 

 10 days. 



Young Larva. — Length 24 hours from egg .1 inch; precisely like 

 Comma at same stage ; cylindrical, even from 2 to 7, then tapering slightly 

 to extremity ; on 2 is a chitinous dorsal patch on which are six tubercles, 

 three on either side the medio-dorsal line, each with black hair ; below are 

 two tubercles on either side; on 3 to 13 are two dorsal rows of large 

 tubercles, one to each segment, on the anterior part of same, each with 

 long curved hair, from 3 to 7 turned forwards, the rest back ; next, a row 

 of small tubercles from 3 to 13 ; on 3 and 4, these stand under the dor- 

 sals, but on the other segments they are behind the line ; a third row of 

 small tubercles from 5 to 13, under the dorsals, and on 2 to 4 is an exten- 

 sion of this row below the line of the other segments ; on 3 and 4 is a 

 short row, in line with the spiracles, and a corresponding tubercle appears 

 on 13 ; below spiracles, on the posterior part of each segment from 5 to 

 13, is a minute tubercle ; and finally, along base of body is a row of 

 minute ones from 2 to 13, on 2 to 4 one to each segment, also on 13, but 

 on the other segments, two to each ; from all these proceed hairs, those 

 of the basal row depressed, but of the other rows, from 2 to 7 they are 

 turned forward, the rest back ; color at first whitish-yellow, semi-translu- 

 cent, and some examples have the dorsum crossed by brownish patches 

 alternating with the yellow ; as the stage proceeds the body becomes red- 

 brown, with white on dorsum of segments 4, 6, 8, 10, with variation in 



