THE STATE ENTOMOLOGIST. 133 



grow apace and by the end of April have usually acquired their full 

 size, when they present the appearance of Figure 56, a ; c showing 

 an enlarged side section of one of the principal joints, and d a back 

 view of the same. The color is now velvety black above, and pale 

 bluish, speckled with black below; there is a deep orange line along 

 the back, and a more distinct wavy and broken one along each side: 

 the warts, illustrated in the enlarged sections are steel-blue and gran- 

 ulated, and their irregularities, as they catch and reflect the light, 

 look like minute pale blue diamonds, the whole body, upon casually 

 glancing at it, appearing studded with these blue points. This worm 

 spins a slight cocoon of white silk in any sheltered place it can find, 

 and changes to a chrysalis of a purple-brown color, finely and thinly 

 punctured and terminating in a horizontally flattened plate, which is 

 furnished with numerous yellowish-brown curled bristles. The moth 

 {Fig. 50, b) issues from this chrysalis during the fore part of June. It 

 is a very plainly marked species, being either milk-white or cream- 

 colored, with the head, collar, basal and apical joints of the abdomen 

 above, and the whole body, legs, and anterior margins of the wings 

 fulvous or dull orange* It was described in 1S60 by Dr. Brackenridge 

 Clemens under the name of I£i/pereo7Rpa fulvicosta^ but is now prop- 

 erly referred to the genus CallimorpJia. It may be known in English as 

 the Cream Callimorpha as it is disguished from all other moths by its 

 unspotted creamy appearance.^ This worm is found more commonly on 



*Cat£imorpka vestalis, Packard (Proc. Eat. See. Phil. Ill, p. 108), must fce considered as a sy- 

 -nonym oijulvicosta, for Dr. Packard has certainly given no characters that should he considered 

 -specific. To show on what grounds the new species is founded I will quote in full the original de~ 

 -scription of fulvicosta and afterwards that of the so-called veetalis; 



C. fulvicosta, Clem.— "White. Palpi yellow orange, tips blackish. Head prothorax, the 

 interior edge of the fore wings, especially beneath, yellow-orange ; sometimes the costa of the 

 ■fore wings is dark brownish. Breast and legs yellow orange, the middle and fore tibia? and tarsi 

 Jblackish. Abdomen tipped with yellowish orange. 



"Illinois. From Robt. Kcnnicott." 



C. vestalis, Pack. — "■$ and £ pure immaculate milk-white, g white. Tips of the palpi brown. 

 •Head and prothorax, basal half of the patagia and costa of both wings above and beneath yel- 

 lowish. The legs are also yellow beneath. The abdomen is white and unspotted. Antennas brown. 



Bodv c? - 65 > 2 - 65 - Ex P- win S s d 1 L70 > 2 x - 70 iach - 



"" Middle Atlantic States (Coll. Ent. Soc. Phil., through A. R. Grote." 



Now, comparing the descriptions, vestalis differs an no other respect from fulvicosta, than in 

 the legs being yellow beneath instead of having the middle and fore tibiae blackish as described by 

 'Clemens, Three bred specimens in my possession differ in this trifling character, and though Dr. 

 Packard says that his species differs remarkably [!.'] from the other in being pure white and of small- 

 er size, yet Dr. Clemens gives no measurements and there are specimens in my own cabinet and in 

 Mr. Walsh's of all shades of white to cream color and some of them fully as small as the measure- 

 ments above quoted. Moreover I have a specimen marked vestalis, kindly sent me by my friend 

 'Cresson of the Am. Entomological Society, and while in Philadelphia last fall I examined all the 

 specimens marked or said to be vestalis without finding any distinguishing characters at, all. If a 

 ■new species is to be made out of such trifling characters in the face of the fact that the species 

 •of the genus Cailimorpha are very prone to vary, and that twenty times as much variation is found 

 in hundreds of other species of Lepidoptera, what is the science of entomology to come to ? 



fProe. Acad. Nat. Sci. Phil., 1860, p. 536. 



JThe only insect whieh very closely resembles it is a pale variety of a moth known as the Egle 

 {Euchates egle, Harr.) whose beautiful larva is tolerably common on our milkweeds. This last 

 however may. always be distinguished by the feathered antenna? of the male, the different shaded 

 wings and the deep orange and black shotted abdomen. 



