1092 THE BUTTERFLIES OF NEW EXGLANU. 



iiliildiiiiiial segment atiain as large as the lirst, regularly obovate ; most of the segments 

 divided by transverse lines into sections, of -which a broad one, occupying the anterior 

 half, is partially divided by a posterior groove into a section similar to the live sub- 

 eqnal ones which follow it, but the last pair of the five are again less distinctly sepa- 

 rated than the others ; whole body closely sprinkled with minute papillae, irregularly 

 disposed, forming more than a single row upon the narrower sections and showing no 

 tendency to a transverse disposition; a laterodorsal series of minnte, crateriform 

 disks, scarcely larger than the papillae, situated in the middle of the anterior half of 

 each segment, and an infrastigmatal series of larger, crateriform disks, but still consid- 

 erably smaller than the spiracles, halfway between them and the ventro-stigmatal fold ; 

 legs slender, the last three joints gently tapering, slightly appressed, tlie claw very 

 delicate ; prolegs very short. 



This genus, which inchides several species, is peculiar to tlio southern 

 half of North America, including tlie Antilles and n'irtli of tlie tropics, 

 but is restricted to the part lying east of the Itocky Mountains. It reaches 

 from about the loth to the 45th degree of latitude. Three species have 

 been found in New England, one a very characteristic species but com- 

 moner in the north than the south, tlie otlier two in tiie southern jtortion, 

 one not infrequently, the other as one of the rarest of our insects. 



The butterflies are of small size, the male provided with a rather broad 

 discal patch on the fore wings. They are dark brown, tiie fore wings with 

 a couple of small pale spots near the middle or sometimes, in the male, witii 

 all but the outer border tawny. Beneath, the fore wings resemble the 

 upper surface, wliile the middle of the hind wings is marked witii a more 

 or less feeble, yellowish, transverse belt of varying breadtli. 



The life histories of several species are partially, of none fully known, 

 indicating that the species are single brooded in the nortii, double or triple 

 brooded in the south , and the winter appears to be passed in some instances 

 as a partly grown caterpillar, in others as a chrysalis. Tlie caterpillars 

 feed on grasses. 



The eggs are white, moderately high for tiieir breadth, and laid singly. 



The caterpillar is Ijorn with a large head and an anteriorly ridged 

 thoracic shield, with moderately long dermal appendages in lateral, infra- 

 lateral and suprastigmatal series, and some very long recurved hairs on the 

 terminal segments. 



The mature caterpillars are long and slender, largest in the posterior 

 half, of a dark color from a dense flecking of dark papillae, a narrow 

 black thoracic shield, Ijlack and deeply pimctate head and a very thin and 

 excessively short pile. 



