THE NYMPHS 



obsolete or much less developed than in the great 



spangled fritillary ; a smaller species expanding 



from two to two and one-half inches. (A. atlantis), 



p. 118. The Mountain Silver-spot. 



DD. The buff submarginal belt between the two outer 



rows of silvery spots on the outer surface of the hind 



wings narrow or wanting, being greatly encroached 



upon by the ground color. (A. aphrodite), p. 117. 



The Silver-spot Fritillary. 



The Gulf Fritillary 



Agraulis vanilla (A-grau'lis va-nil'lse) 



Plate XVIII, Fig. i, 2 



Wings reddish fulvous above ; the veins of the front wings 

 are black on the outer two-thirds of the wing ; the black ex- 

 pands into spots at the end of veins M 3 to anal ; there are 

 two white spots in cell R + M and one on the medial cross- 

 vein each surrounded by black ; cells M 3 , Cu, and Cu 3 each 

 contains a round black spot. The outer margin of the hind 

 wings has a broad black border, which contains a fulvous spot 

 in each cell ; there is a black spot at the base of cell M 3 , and 

 one in cell R,. The under surface of the wings is marked with 

 many large silvery spots ; of which there are about ten near 

 the apex of the front wings, three or four in cell R + M of 

 the same wings, and about twenty-four on each hind wing. 

 Expanse of wings two and one-fourth inches to three inches. 



Caterpillar. — In addition to the six rows of thorny 

 spines, which characterize the caterpillars of many other 

 fritillaries, this one has on the head a pair of backward bend- 



107 



