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The adult cottonwood borer is a large longhorn beetle with a black-and-white coloration and black antennae as long or longer than the body. [5] The white portions are due to microscopic masses of hair. [6] The larvae have legless, cylindrical, creamy-white bodies with a brown-to-black head and grow up to 38 millimetres (1.5 in) long.
Larval Sciaridae are slender and lack legs. They are white except for a black head, and their skin is slightly transparent so the contents of the gut are visible. [4] The abdominal creeping welts lack sclerotised spicules; this differentiates Sciaridae from the related family Mycetophilidae, in which sclerotised spicules are present. [6]
It always has a glossy pronotum and the underside of the beetle has a thin red rim to the otherwise black abdominal segments. [1] [4] The larvae are black with white markings, have six legs and several blunt conical spines on each segment of the abdomen, similar to larvae of Cycloneda but with shorter legs. [1]
Dolichovespula maculata is a species of wasp in the genus Dolichovespula and a member of the eusocial, cosmopolitan family Vespidae.It is taxonomically an aerial yellowjacket but is known by many colloquial names, primarily bald-faced hornet, but also including bald-faced aerial yellowjacket, bald-faced wasp, bald hornet, white-faced hornet, blackjacket, white-tailed hornet, spruce wasp, and ...
The head and collar as well as the pectinations of the antennae are black. Tibiae and tarsi with broad black rings. The East-Asiatic species Leucoma candida (Staudinger, 1892) with different male genitalia structure, has much purer glossy white and entirely opaque, more thickly scaled, wings and is on the whole smaller, with narrower wings.
Many species of sawfly larvae are strikingly coloured, exhibiting colour combinations such as black and white while others are black and yellow. This is a warning colouration because some larvae can secrete irritating fluids from glands located on their undersides.
The white egg at first is elliptical (1.5 mm by 2.1 mm) but becomes more spherical as the larva inside develops. These hatch into white grubs about 18 days after laying. The newly hatched larvae are 8 mm long and grow to a length around 40 mm. Whitish with a brownish-black head, the grubs have conspicuous brown spiracles along the sides of ...
The first instar follows the hatching of the egg into large white larvae. The larvae are light yellow with distinctive brown heads and have soft bodies. The larvae appear to be very hairy. Following a moulting, the larvae enter the second instar. They have tubercles covered with black hair. In the third instar, large white larvae display more ...