It is a species of shield bug also known as bagrada bug and harlequin bug. The adult bug is 5 - 7 mm in length, shield-shaped, and black with white and orange markings. The female, which is larger than the male, lays up to 100 oval or barrel-shaped eggs on leaves or in soil beneath plants.The eggs are white when freshly deposited and turn orange over time. Within 8 days the first-instar nymph emerges. It is bright orange-red and turns darker as it develops, becoming black by the last instar. By the size of the one on the photo it can be concluded that it is a male specimen.
It is native to much of eastern and southern Africa and parts of southern Europe and Asia. It is known elsewhere as an introduced species, including California and Arizona, where it was first reported in 2008. It is a major pest insect of Brassica oleracea crops (including cabbage, kale, cauliflower, Brussels sprouts, and broccoli), and related crucifers such as turnips, rape, and mustard. The adult and nymph of the species suck sap from the leaves of the plants, causing wilting, yellowing, and stunting of growth. Besides crucifers, the bugs are known on papaya, sorghum, maize, potato, cotton, caper, pearl millet, and some legumes. Large numbers of the bug congregate on the plants and cause extensive damage. This specimen was found indoors in the restaurant so probably it was brought on some food as its feeding source.