HII.KY— REMARKS ON CANKER-WORMS, ETC. 



275 



Chrysalis. 



POMETARIA. 



Foiined in a simple earthen cell, 

 the earth compressed, and lined 

 with verj few silken threads so as 

 to form a fragile cocoon, which 

 easily breaks to pieces. 



Male — Sparsely and shallowly 

 pitted. Pale grayish brown, with a 

 greenish tint on the wing-sheaths, 

 which extend to the posterior edge 

 of the 5th abdominal joint; abdo- 

 men with the spine at tip generally 

 simple, and onh- occasionally slight- 

 ly bifurcate. 



Female — With wing-sheaths, 

 but, compared with those of the 

 male, thinner and extending only to 

 posterior edge of the 4th abdominal 

 joint : much more robust and more 

 arched dorsally, with the mesotho- 

 racic joint shorter, and much redu- 

 ced in size. Pitted like the male. 

 (Fig. 17.) 



Formed in a perfect cocoon of 

 fine, densely spun silk of a buff co- 

 lor, interwoven on the outside with 

 particles of earth ; never breaking 

 open except by force or purpose. 



Male — Not pitted. Darker 

 brown than vernata ; the wing- 

 sheaths, as in vernata, reaching to 

 the 6th abdominal joint; the anus 

 more blunt and with the spine 

 more dorsal, decur\'ed, and always 

 bifurcate, the prongs spreading 

 and often long and fine. (Fig. 

 21, a.) 



Female — Difters from the male 

 in the same way as vernata, but is 

 relatively stouter and more arched 

 dorsally : a broad, dusky, dorsal 

 stripe often visible toward the time 

 of issuing — all the more remarka- 

 ble that there is no such stripe on 

 the imago, whereas in vernata, 

 where the imago has such a stripe, 

 it is not indicated in the chrysalis. 

 (Fig. 21, b.) 



Imago. 



Male — Palpi very short, but dis- 

 tinctly 2-jointed. 



AntetincB with not quite 40 joints, 

 the longest more thantwice as long 

 as wide, each with two pairs of hair 

 fascicles, springing from very slight, 

 lateral elevations, the longest hair 

 about thrice the diameter of joint. 

 Looking from above, with ordinary 

 lens-power, the!^e hairs give the ap- 

 pearance of fine, ciliate pectina- 

 tions. (Fig. 15, c.) 



Abdomen with ihe first seven joints 

 bearing each two transverse dorsal 

 rows of stiff, reddish spines, pointing 

 posteriorly. 



Male — Palpi rudimentary with 

 joints indistinguishable. 



Anietinte with over 50 joints, the 

 longest not twice as long as wide, 

 each with one pair of fascicles of 

 slightly curled hairs, the longest 

 about thrice as long as the diame- 

 ter of the joint, and all springing 

 from a prominent, dark hump 

 which occupies the basal half of 

 the joint beneath, and gives a some- 

 what serrate appearance from the 

 side. The same appearance of 

 ciliate pectinations looking from 

 above. (Fig. 19, c, d.) 



Abdomen without spines and of- 

 ten with a moderate anal brush. 



