ORDER ORTIIOl'TERA 



61 



there is much vegetation and sometimes the young are killed 

 off in large numbers by late frosts. The young develop 

 pretty rapidly and are able to travel quite considerable 

 distances, especially if vegetation is scarce. They acquire 



-Mduuoplus fcmur-ruhrum, female. (After Lugger.) 



wings often as early as the latter part of Jime. Flights may 

 occur as early as July and often in August and September. 

 Migration probably occurs rather sparingly unless food 

 supply is scanty. 



