Morphology of the nymphs of euschistus convergens (Hemiptera: Pentatomidae)

Abstract

Nymphs of Euschistus (Mitripus) convergens (Herrich-Schaffer) (Hemiptera: Pentatomidae) are described using light and scanning electron microscopy. In the 1st instar, the integument and the lateral margins of the body are smooth, the dorsal abdominal scent glands bear a rounded peritreme with cuticular valve, and the evaporatorium surface bears pointed projections. From the 2nd to the 5th instars, the integument surface is granulated, the lateral margins of the body are serrated, the dorsal abdominal scent glands bear a spout-shaped peritreme with a cuticular valve, and the evaporatorium surface is reticulated. The overall morphology of E. convergens nymphs resembles the morphology of nymphs of other Euschistus species.