Description of the Larva of Sphaeropthalma pensylvanica (Lepeletier) (Hymenoptera: Mutillidae: Sphaeropthalminae)

The larval stage of Sphaeropthalma pensylvanica (Lepeletier) is described and differentiated from other known larval Mutillidae. The larva of S. pensylvanica differs from the other described larvae of Mutillidae by the following combination of characters: the tenth abdominal segment rounded and not produced over the anus, a basal mandibular tooth half the size of the third mandibular tooth, large, densely clustered sensilla on the labrum, and prominent pleural lobes.