CATDOLL : CATDOLL: How to identify cockroaches

1. How to identify cockroaches

Cockroaches belong to the order Blattodea of ​​the class Insecta. There are more than 5,000 known species, including home-dwelling and wild-dwelling species. Wild-dwelling species account for the vast majority of this order. Most of them live in grass, piles of dead branches and leaves, gravel or under tree bark. Some live in the nests of ants, termites, bees, etc., and generally have little to do with humans. Home-dwelling species that become pests of the order account for about 0.5% of this order, mainly belonging to the Blattidae, Blattidae and Brontoptera. There are 13 known species in my country (excluding the ground turtles).

The morphological characteristics of this order are that the body size varies (2-90 mm) and the color is also different. The insect body is flat dorsally and ventrally. The head is tilted forward and downward, and the antennae are long and filamentous. The mouthparts are primitive chewing type, with hard upper jaws, 5-segment lower jaws, and 3-segment lower labium. The compound eyes are well developed, renalized or absent; the forewings are leathery, and the hindwings are membranous. The legs are well developed and suitable for running.

The Xth dorsal plate on the abdomen of male and female insects is called the supra-anal plate, and a pair of multi-segmented cerci grow on both sides of its base. The VIIth ventral plate of female insects and the Xth ventral plate of male insects are collectively called the lower genital plate. The lower genital plate of male insects has a pair of spicules (abdominal spines) on both sides of the end, which is an important feature to distinguish between adult males and females.

The body is flat, dark brown, and usually medium in size. The head is small and can move around. The antennae are long and filamentous, and the compound eyes are well developed. The wings are flat and cover the back of the abdomen; some species are wingless. They are not good at flying, but can run fast. They have incomplete metamorphosis. They lay eggs in egg sheaths. There are about 6,000 species (some say more than 2,250 species), mainly distributed in tropical and subtropical areas. They live in the wild or indoors. There is the American cockroach, which is the largest individual and is often kept as a pet.

The American cockroach (Periplaneta americana) is 30-60-500 mm long (up to 2 inches long), light reddish brown, and lives outdoors or in dark, warm indoor environments (such as basements and rooms with furnaces). The adult stage lasts about 1.5 years. The female can lay 50 or more egg pods, each containing about 16 eggs, which hatch into nymphs after 45 days. The nymph stage lasts 11-60-14 months. The American cockroach is native to tropical and subtropical America, has well-developed wings, and can fly long distances.

The female German cockroach (Blattella germanica) of the genus Periplaneta is a common indoor pest. It is light brown with two black stripes on the prothorax. The female lays an egg pod three days after mating and carries it for about 20 days. It is small, about 12 cm (less than 0.5 inches) long, so it is often brought into homes in grocery store bags or boxes. It has been carried around the world by ships. It can produce three or more generations a year. The German cockroach is very numerous around the water pipes of the Croton Aqueduct in New York City, so it is commonly known as the Croton bug.

The Brown-banded Cockroach (Supella supellectilium) is similar to the German cockroach, but slightly smaller. The male has well-developed wings that are slightly lighter than the female, whose wings are shorter and nonfunctional. Both sexes have two light stripes across their backs. Adults live 200 days. There may be two generations per year. Eggs may be laid in clothing, wooden planks, or floorboards. With the advent of heated homes, the Brown-banded Cockroach has also appeared in cooler areas.

The Oriental cockroach (Blatta orientalis) is considered the dirtiest household pest. It is oval, black or dark brown, shiny, and 25-6-530 mm long. Its life cycle is similar to that of the American cockroach, with short and well-developed wings in males and degenerate wings in females. It originated in Asia and was later distributed to all temperate regions by merchants' transportation.

2. What kind of bug is this? It looks like a cockroach but not like one. There is only one so far.

Hello, it is the earthworm, also known as the earthworm, earthworm. It is a cousin of the cockroach. It is a traditional Chinese medicine.

3. Dear experts, does anyone know what kind of insect this is?

This is a cockroach, an insect of the order Blattaria, belonging to the phylum Arthropoda, class Insecta, order Blattaria, commonly known as cockroach, is a common medical insect. Cockroaches are flat, dark brown, usually medium-sized, and extremely small.

This is a cockroach, Periplaneta americana.

This is a male earthworm, an insect of the order Blattodea, also known as earthworm. It is a medicinal herb that can promote blood circulation and remove blood stasis, and is used to treat injuries from falls.

Is this a small cockroach? It's a small cockroach that hasn't grown up yet. Because you put it with its back facing the ground and its four legs facing up, many people may not be able to tell what it is. But I can still tell that it is a small cockroach.

This is a cockroach, just a different species. Just look at its antennae and you'll know it only appears in the forest.