Genus Pieris 



FIG. 141. Neuration 

 of the genus Pieris. 



the primaries is straight, the outer margin of the secondaries more 

 or less evenly rounded. 



Egg. The egg is spindle-shaped, with vertical raised ridges. 



Caterpillar. Elongate, the head hemispherical, very slightly, 

 if at all, larger in diameter than the body. The caterpillars feed 

 upon cruciferous plants. 



Chrysalis. Attached by the anal extremity, and held in place 

 by a silk girdle; slightly concave on the ventral side; convex on 

 the dorsal side, with a distinct or pointed 

 hump-like projection on the thorax. At the 

 point where the thoracic and abdominal seg- 

 ments unite in some species there is in addi- 

 tion a distinct keel-shaped eminence, and at 

 the head the chrysalis is furnished with a short 

 conical projection. 



(1) Pieris monuste, Linnaeus, Plate 

 XXXV, Fig. i, $ ; Fig. 2, ? (The Great South- 

 ern White). 



Butterfly. The upper side of the wings, 

 depicted in the plate, requires no comment. 

 On the under side the black marginal mark- 

 ings of the primaries reappear as pale-brown markings. The hind 

 wing is pale yellow or grayish-saffron, crossed by an ill-defined 

 pale-brown transverse band of spots, and has the veins marked 

 with pale brown, and interspersed between them pale-brown rays 

 on the interspaces. 



Early Stages. What we know of these is derived principally 

 from Abbot through Boisduval, and there is opportunity here 

 for investigation. 



The species has a wide range through tropical America, and 

 is not uncommon in the Gulf States. 



(2) Pieris beckeri, Edwards, Plate XXXIV, Fig. 8, $ ; Fig. 

 9, ? (Becker's White). 



Butterfly. This species, through the green markings of the 

 under side of the hind wings, concentrated in broad blotches on 

 the disk, recalls somewhat the species of the genus Euchloe', and 

 by these markings it may easily be discriminated from all other 

 allied species. 



Early Stages. These have been in part described by Edwards 

 in the second volume of "The Butterflies of North America." 



277 



