The internal reproductive organs of females and males of Phytalus sanctipauli are described and illustrated. The amount of fat body in the abdominal cavity was assessed. The remaining in the soil, from March to September, of sexually immature females and males bearing the abdominal cavity totally filled with fat body characterized the state of diapause in this species, in Coxilha (52°20'W and 28°05'S), RS, Brazil.
Phytalus sanctipauli; wheat white grub; diapause; internal reproductive organs; fat body
