8:> 



MARYLAND AGRICULTURAL EXPERIMENT STATION. 



liatches from a minute yellowish, ribbed egg and transforms to a pale 

 green chrysalis, covered with small black dots, (Fig. 7, f). The adult 

 butterfly is the common white or yellowish white species, with black 

 spots, as at Figures 8 and 9, seen flying about cabbage patches. 



The Cabbage Plusia (F/u- 

 sia brassicce) is also a green 

 caterpillar Init is larger than 

 the preceding and lighter in 

 color. It is' marked with 

 lighter longitudinal stripes 

 and is very soft bodied and 

 tender. It measures 2 inches 

 in length Avhen fnll-growai, 

 (Fig. 10, a.) 



The egg from which it 

 hatches is pale greenish yel- 

 low in color, convex in shape 

 and two-hundredths of f^n 

 inch in diameter. In trans- 

 forming to pupa the caterpil- 

 lar spins a delicate semi-trans- 

 parent Aveb usually partly or 

 qjitirely wrapping itself in a leaf, (Fig. 10, ^.) The adult insect is a 

 dark gray moth with a wing spread of al)out 1^ inches and marked with 

 a bright silvery dot and \'-shaped mark near the center of each front 

 wing, (Fig. 10^, c^ 



The Cabbage Mamestra {Mam- 

 cstra ti-ifolii) is a variable caterpil- 

 lar ill color, some l)eing bright 

 green above and some nearly brown, 

 but all are marked bv a rather 



Fig. 10 —PluKia hrn,'<sic(r; n, caterpiUar; /), cliry 

 salis in cocoou; c, raotu, male. 



.,<f«<7 broad jiink stripe down each side, 

 'vL (Fio-. 11, /;. r.) It transforms to 



) 



l)upa in an oval cavity about two 

 inches below the surface of the 

 ground. The parent moth is some- 

 what variable in size and color, 

 ranging from a pale yellowish-gray 

 to a dark l)rownish-gray but mottled 

 as in the figure, (Fig. 11, a. d.) It 

 is readily distinguished from the 

 moth of "the Plusia by lacking the 

 silvery spot on the front wing. This 

 insect is more common in Maryland 

 cabbase-fields than I have known it 



' Fig. 11.— Mamestra trtfolU; a, h, larvae: c, elsewhere, 

 pupa; d, motn; e, wing or same (enlarged): 

 /, anal segment of pupa. 



