(學名: Sceliphron caementarium 細腰蜂科Sphecidae )

Description: 25-30 mm in length; long cylindrical one segmented "waist" (pedicel) between thorax and abdomen; body black with large yellow area on prothorax; yellow pattern on thorax, pedicel, and 1st segment of abdomen; legs mostly yellow; wings brown-black.

Life cycle: Solitary female builds a nest out of moist mud containing several parallel cell rows. A paralyzed spider is stuffed into each cell and one egg deposited on each spider. The female then closes the cell opening with mud. Hatching larvae slowly consume the spiders after which they pupate inside the cell. Males are rarely seen before midsummer and feed on nectar.

Habitat: Rock faces, under rocks, overhanging roofs, attics and other structures.

Food: Adults feed on nectar, larvae feed on provided spiders.