78 INDEX TO MISSOURI ENTOMOLOGICAL REPORTS. 



the termination of the transverse posterior; posterior border umlulate with a dark 

 browu line which is sometimes marked with pale crescents; a series of similar cres- 

 cents (often mere dots) just inside the terminal space; the small snb-cellnlary silver 

 spot oval, sometimes uniformly silvery-white but more often with a fulvous centre, 

 sometimes free from, but more often attached to the larger one which has the shape 

 of a constricted U, very generally with a fulvous mark inside, which extends basally 

 to the transverse anterior at costa. Fringes dentate, of the color of the wing, and 

 with a single undulating line parallel to that on the terminal border. Hind wings 

 fuliginous, inclining to yellowish towards base, and with but a slight pearly lustre ; 

 fringes very pale with a darker inner line. Under surfaces pale fuliginous with a 

 pearly lustre, the front wings with a distinct fulvous mark under the sub-cellulary 

 spots, speckled more or less with the same color around the borders of the wing, the 

 fringes being dentate with light and dark ; the hind wings speckled with fulvous on 

 their basal half, and with the fringes as above. Thorax variegated with the same 

 color as front wings, the tufts being fulvous inclining to pink. Abdomen 9 gray, with 

 a few pale hairs near the base, and scarcely extending beyond the margin of the hind 

 wings; $ longer, covered with pale silky hairs, a distinct dorsal brown tuft on each 

 of the three basal segments, and two large lateral either fawn-colored or golden-yellow 

 brushes on the fifth segment, meeting on the back and partly covering two smaller 

 brushes on the sixth, which are tipped with black ; terminal segment flattened and 

 with two lateral more dusky and smaller tufts : underside of thorax and abdomen 

 gray, mixed with flesh-color. Alar expanse 1.55 inches. Described from numerous 

 bred specimens. In a suite of specimens bred from the same brood of larvte a consid- 

 erable difference in the general depth of color is found, some being fully as dark again 

 as others. 



Closely resembles PInsia ni, Engr., -which occurs in Italy, Sicily, France, and the 

 northern parts of America. Mr. P. Zeller of Stettin, Prussia, to -whom I sent speci- 

 mens, considers it distinct however from the European ni, and I have consequently 

 given it a name in accordance with its habits. [Second Rept., pp. 111-112. Fig. 81. 



Notwithstanding its close resemblance to M/, the best authorities agree 

 with Zeller in considering it distinct, as it certainly is. Strangely enough 

 this same brassicfe, or what is extremely close to it, occurs also in South 

 Europe and is figured in Stainton's Entomologist's Annual for 1870 as 

 P. ni, one specimen having been found on the south coast of England, 

 which specimen Zeller, as he wrote me, belie res to have come from 

 America. Staudiuger would probably characterize brass iccc as a " species 

 Darwiuiana," and there are doubtless individuals of both the species 

 which approach each other so closely as to be undistinguishable. There 

 is such variation in the silver spot in either that it cannot be depended 

 on alone, but Speyer (Europaisch-Amerieanische Verwaudtschaften ; 

 Stettinet- Eni. Zeit., June, 1875, p. 165) has presented other differences 

 that are constant in detail, the most notiqeable of which are the darker 

 and more irrorate coloring and the interrupted and wavy terminal line 

 of brassiccc, against the paler, smoother, more metallic coloring and the 

 perfectly straight and unbroken terminal line of -n i. 



The larva is the most common cabbage pest in the Southern States, 

 and is infested with an undetermined parasite. Mr. E. A. Popeuoe has 

 found it feeding on the leaves of Crepis, and what appears to be the 

 same has been found by my assistants on Clover, Dandelion, Senecio 

 scandens, and Chenopodium. 



