326 



MOTHS AND BUTTERFLIES. 



The genus Terias is widely distributed over most parts of 

 the workl. It comprises a hirge number of butterflies of small 



Pieris protodice. Female. 



size, whose colors are mostl}- yellow or orange with black borders. 

 Two or three species are very abundant in the eastern lialf of our 

 country. 



Terias Usa is a little butterfl}', which, while on the wing, one 

 might easily mistake for a smalLspecimen of Colias phUodiee. It is 

 thin and delicate, seemingly a ver}^ frail creature. It sometimes 

 makes its appearance in great numbers, and has even been seen at 

 sea manj' miles from land, where it doubtless had been swept b}^ 



Terms nicippe. Male. 



strong currents of air. It is distributed over the Avhole eastern 

 half of our countr}^ except the most nortliern part, and although 



