Ferton (1914) stated that he had reported in 1912 that this species hunted Hemiptera, but that this observation was a lapsus. _Nesting site._--In the ground of sandy woodlot or border of dry woods; the nest is a hole 5.5 to 8 cm. long ending in a horizontal cell. Grandi (1928) stated that the entrance to the nest descended obliquely for 5 to 6 cm. and ended 4 cm. below the surface of the ground. _Behavior._--Two cockroaches, either sex, adults or nymphs, were stored in the cell (Adlerz, 1903; Grandi, 1928). The wasp laid her egg on the first prey brought, attaching it behind the front coxa. The cockroaches were not excitable and their antennae had not been injured. Grandi (1928) stated that the claws of the hind tarsi of the victims may be amputated. The hatched larva may consume one of its victims in four days leaving only the head, pronotum, tegmina, wings, and the urosternum. =Podium abdominale= (Perty) _Synonymy._--_Trigonopsis abdominalis_ Perty [Kohl, 1902]. _Natural hosts._--Cockroaches, nymphs, Ecuador (Williams, 1928): These wasps are apparently mainly arboreal mud daubers. The female wasp constructs a mud nest on underside of a palm leaf. Wasp egg is attached behind one of the forecoxae of the cockroach. Several cockroaches are stored in each nest. The prey is not immobilized as a result of the sting, and its antennae are left intact. =Podium carolina= Rohwer _Natural host._--_Parcoblatta pensylvanica_, nymphs (Rau, 1937): Nesting sites are mud nests of _Sceliphron caementarium_ (Drury). One to three cockroach nymphs are stored per nest; mud partitions are placed in tube; the nest is plugged with mud which is coated with resin. _Distribution._--U.S.A., New York to North Carolina (Murray, 1951); Florida (Krombein and Evans, 1955). =Podium dubium= Taschenberg _Natural hosts._--Epilamprine cockroaches, Brazil (Williams, 1928): Burrows, lenticular in cross section, are found on shaded trails. The wasp's habits are similar to those of _P. flavipenne_ and _P. haematogastrum_. =Podium flavipenne= Lepeletier