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Male genitalia of Lepidoptera. The main component of the male reproductive system is the testicle, suspended in the body cavity by tracheae and the fat body.The more primitive apterygote insects have a single testis, and in some lepidopterans the two maturing testes are secondarily fused into one structure during the later stages of larval development, although the ducts leading from them ...
In tiger moths (Utetheisa ornatrix), females choose the males that produce the most pheromone; an honest signal of the amount of protective alkaloids the male has, as well as an indicator of the size of female offspring (females fertilised by such males lay more eggs). [4] Male cockroaches form dominance hierarchies based on pheromone "badges ...
Cockroaches live up to a year, and the female may produce up to eight egg cases in a lifetime; in favorable conditions, she can produce 300 to 400 offspring. Other species of cockroaches, however, can produce far more eggs; in some cases a female needs to be impregnated only once to be able to lay eggs for the rest of her life. [27]
Dubia cockroaches: Adult Male, Adult Female, and Juvenile. Blaptica dubia , the dubia roach , orange-spotted roach , [ 2 ] Guyana spotted roach , [ 3 ] or Argentinian wood roach , [ 4 ] [ 5 ] is a medium-sized species of cockroach which grows to around 40–45 mm (1.6–1.8 in).
Male butterflies use a wide range of chemicals as sex pheromones, for example pyrrolizidine alkaloids, terpenes and aromatic compounds such as benzaldehyde. Research into the chemical communication of insects is expanding our understanding of how they locate their food sources or places to lay eggs.
Ahead, entomologists explain why you don't really need to worry about cockroach bites—but rather how they can make you sick if you have an infestation. Ahead, entomologists explain why you don't ...
The Florida woods cockroach (Eurycotis floridana) is a large cockroach species which typically grows to a length of 30–40 mm (1.2–1.6 in). [2] When alarmed, adults can eject an extremely foul-smelling directional spray up to one metre (3.3 ft), [3] which inspired several of its other common names: Florida skunk roach, Florida stinkroach, skunk cockroach, skunk roach, stinking cockroach ...
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