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
False garden mantis False garden mantis The false garden mantis ("Pseudomantis albofimbriata") is one of the most common species of mantis in Australia. Females reach 70 mm while males reach 50 mm. The false garden mantis is either green or brown but rarely may come in other colours. They have a distinctive dark spot on the femur of each raptorial foreleg. Females have short wings that only cover half of the abdomen, whereas Males have wings that cover the full length of the abdomen. Males sometimes have yellow triangular markings on the underside of the abdomen. They are widely distributed over Australia and