In the feeling and protection of their genetic descendant, insects and spiders show off some zeal in analogies to reasoning and some sensitive examples of blind instinct. The case I present here is the digger wasps of genus Pepsis and tarantula spiders together with their opponent. An example is a non-familiar situation which the victim, though fully able to defend itself, gives up accidentally to its destruction. A lot of tarantula spiders reside in the tropics, but many species appears in the temperate zone and a little are common in southern U. S.
Some types are large and have strong fangs with which they can inflict a deep wound. These spiders are not harmful to mankind and one can hold them in a gentle manner to avoid any kind of bite from them. It is only harmful on insects and small mammals like mice. For human, it is no worse than a hornet’s sting. In a Paris museum, is a tropical specimen which is said to have been living in confinement for 25 years. The male tarantula and matured ones as well does not have long life after it mates with its female tarantula, but the female tarantula will leave long and mate with several male tarantulas.
Matured male tarantulas wander about after dark in search of female tarantulas and occasionally go into houses. Tarantulas customarily live in deep cylindrical burrows. Laboratory experiments have proven that, tarantulas can differentiate three types of touch: pressure against the body wall, stroking of the body hair and riffling of certain very fine hairs on the legs called trichobothria. When one uses the tip of a sharpen wood to compress the body it makes the tarantula spider to move slowly a little while. The tarantula may react when the compressing continue for some time and can hold the object that is threatening it.
Whiles spiders and especially hairy ones have an extra delicate sense of touch. These three tactile responses are so different from one another that there is no point in confusing them. They serve the tarantulas adequately for most of its requirement and help it to stay away from annoyance and dangers. But they fail the tarantula completely when it encounters its most deadly enemy, the digger Wasp Pepsis. Most species are either a deep shiny blue all over or deep blue with rusty wings. The largest have a wing span of about 4 inches.
These wasps are beautiful and formidable creatures; they live on nectar and give of an odor when excited as a warning that they are ready to attack. They also give a long lasting pain and swell and the sting is much worse. The matured wasp lives only a few months and hunt for tarantulas. The mother wasp brings a tarantula alive but paralyzed and the wasp attaches the egg to the paralyzed spider’s abdomen for it to be hatched. They also feed on the tarantulas. In all the wasp acts like an intelligent animal and their behavior is different from that of the spider.
In a way the intuitive urge to escape is not only easier but often more efficient than reasoning. The tarantula does exactly what is due except in an encounter with a determined attacker who is dependent for the life of her own species on eliminating as many tarantulas as she can lay eggs. Perhaps, in this section the spider goes it usual way of trying to escape, instead of seizing and eliminating the wasp, because it is not aware of its danger. The survival of the tarantula species as a whole is protected by the fact that the spider is much more fertile than the wasp.