Spider are apparently absent. In some species, the exocuticle of the legs and prosoma is modified by a tanning process, resulting in brown coloration. Bilins are found, for example, in "Micrommata virescens", resulting in its green color. Guanine is responsible for the white markings of the European garden spider "Araneus diadematus". It is in many species accumulated in specialized cells called guanocytes. In genera such as "Tetragnatha", "Leucauge", "Argyrodes" or "Theridiosoma", guanine creates their silvery appearance. While guanine is originally an end-product of protein metabolism, its excretion can be blocked in spiders, leading to an increase in its storage. Structural colors
Mehan Garden Mehan Garden Mehan Garden is an open space in Manila, Philippines. It was established in 1858 by the Spanish colonial authorities as a botanical garden, called the "Jardín Botánico", outside the walled city. It was one of a number of botanical gardens established in Asia by European colonial powers (for example, Acharya Jagadish Chandra Bose Indian Botanic Garden in 1787 and Bogor Botanical Gardens in 1817). Sebastián Vidal was the best known director of the garden. He came to the Philippines in 1871 to work in the forestry service ("Inspección General de Montes"). He was director between 1878 and his