86 Journal. New V^'ork Entomological Society. [Voi. x. 



Eggs deposited in Florida May 20th, hatched June ist, first pup?e 

 July ist, imagines July 12th. 



Eggs of two broods obtained in New York from the moths bred 

 from the Florida brood on July 15th hatched July 21 ; pupated 

 August 2 2d; first imagines September 5th. Stragglers not taken into 

 consideration, the time from depositing of eggs to imago state during 

 the warm months was 50 days. The variability in size of the pupae 

 finds its cause in the sexes; three pup?e measured: Length 1.65, 1.8, 

 1.9 cm.; width of fourth to sixth segment 5.0, 5.5, 6.5 mm. 



The imagines were at first considered to be a variety of Arctia 

 vittata. Twenty-five freshly emerged 9 9 were successively exposed 

 at Rutherford, New Jersey, at such places where A. nals, pJialerata 

 and vittata are found ; females were also exposed on Staten Island 

 during the season, but none of these found mates. Twelve 9 9 niore 

 were sacrificed in this experiment on wooded lawns and meadows in 

 Bronx and at West Farms, where A. vittata is positively to be found, 

 and six on Long Island— but always without favorable result ; they 

 did not attract their own kind near New York. 



About 500 perfect specimens of the three broods were examined. 

 It led to the conclusion that they are neither nais, phalerata nor true 

 vittata. The very constant 9 9 approach vittata closely, but the 

 black color on the abdomen is never so prevailing as with vittata and 

 the secondaries are always red. The very variable $ S are nearest to 

 ■flats {$), were it not for the unchangeable pale costa and the 

 usually unbroken marginal band on secondaries. Out of the entire 

 number of specimens obtained only one, a 9 , has the costal margin 

 nearly edged by a fine black line, but the black color does not reach 

 the root of the wing. All the rest have the yellowish costal stripe 

 extended to the edge. 



The comparison of 212 $ $ and 212 9 9 obtained from the three 

 broods of the Florida form shows the following results, relative to the 



other forms of the group : 



Mates. 



>;. mark complete none. 



> mark indicated or partly present 1 6. 



Without trace of ^ mark 196. 



Black marginal band on secondaries disconnected or broken into spots 85. 



Marginal band on secondaries entire 127. 



Hind wings red with black maculation none. 



Hind wings ochre, profusely suffused with red, sometimes red prevailing 212. 



Hind wings plain yellow or ochre none. 



