Instar

First and second instar ticks are very small. The good news is that they haven't had much chance to pick up disease organisms from hosts to pass on, especially if they've hatched in the house.

See entire post

It does look like a cockroach nymph, maybe third instar at that size.

See entire post

... lasts between two and three weeks and there are four juvenile stages (three nymphs and a pupa from which the adult emerges). Only the first instar is mobile but it moves only a short distance from its egg. Therefore, older instars tend to occur on older leaves with eggs on new leaves. A ...

See entire post

... oil field worker in Texas ....... When he rubbed this lesion, a white worm (about 1 cm long) emerged (Figure 1). This larva was H lineatum, second instar stage. , a second larva exited from a skin lesion on the patient’s back. " ~Mayo Clinic Proceedings Edited in case I violate copy rules ...

See entire post

... algae and plankton. Eggs are laid singly or in clumps, in crevices or pockets of the substrate. Collembolans generally pass through five or six instars before they are sexually mature. Instars one through four are usually considered to be the immature stages. There is no metamorphosis (ametabolous) ...

See entire post