Also called a "Southern Cabbage Butterfly" sits upon a an invasive Globe Chamomile (Stinknet) in Phoenix Arizona. 

It is assumed that many male species contribute nothing but sperm to their offspring, however males of P. Protodice pass on nutrients as well into the female reproductive tract during copulation. The nutrients contain proteins that can be used by the female for egg production and somatic maintenance. Males pass on average 7-8% of their body mass during copulation thought of as a paternal investment. Males must select a female who will put their investment to good use, one trait males select for is bigger size and longer forewing length. 

It is unknown whether larger females are preferred by males or whether larger females can simply be seen at greater distances.