In the USSR it is known 13 representatives of the family Licosa singoriensis.
Tarantulas are spread widely. In the North of their distribution area passes along the upper reaches of the Dnieper, Pripyat, the Yenisei, the Upper Tunguska river, the Volga and Kama rivers; they inhabit the desert zone of the Central Asia and Kazakhstan (big race) and the southern steppe zone of the European part of the USSR (small race). The Eastern border of distribution tarantulas takes place, apparently, on the territory of Mongolia and China, significantly deviating to the South and to the West by Greece, Asia Minor and Egypt; the southern border - the territory of North Africa and forth, veering to the East - Hungary, Romania and Austria. Ecological plasticity tarantulas confirmed by diversity of climatic conditions and landscape zones of their habitats (P. I. Marikovsky, 1956). Live tarantulas dug in their burrows in size from 2 to 5 cm in them they spend most of their life. Nora freely highlights sunlight necessary for sexual maturation and development in cocoons offspring.

Fig. 6. Tarantula in a pose threats

The most widely spoken of South tarantula - hairy spider length of 3-4 cm Golovogrud pear shaped with Horny appendages and eyes, front - chelicera, legs long and strong with hairs and oral appendages. Long powerful and strong legs of unequal size, with many hairs. Abdomen ovate, narrowed front, the body is covered with thick hairs. The color of the cephalothorax - light and dark bands, ventral black scale; the belly is white, gray, brown and black spots and strips. The lighter males females. With age tarantula color changes according to the habitats (Fig. 6). Helicity serve not only to bite, using them tarantula grinds food, digging the ground. Sound waves are caught tactile hairs at a distance of 10-15 meters at Night tarantulas well see the booty (small insects and ground beetles, beetles, medvedki, crickets and other), promptly gets up at her, grabbing, holding his feet, and devour, plunging the claws of the chelicerae.
At the age of 1 year tarantulas reach sexual maturity and after the last molt take copulation. The male, having noticed sitting at the entrance to the burrow female, gently pumping its cobweb pavement, tapping a male, abdomen and vibrates feet. Gradually approaching, captures golovogrud females, and some time is sluggish; after the turn of the abdomen within 1-3 with apply legs long and strong to sexual hole females, located in a cataleptic state. This process is 5-10 times, while the female is not throwing off the male. By the beginning of autumn the males die; females with the onset of frost, dug a hole, fall into a stupor, tightly pressed to the abdomen bent legs. In spring, the females dig a hole, 5-6 days warmed at her entrance and devour the prey, then, digging holes, frizz ball, slash flattened on both sides, sometimes pear-shaped cocoons size of 1-3 cm and lay in each 200 - 700 eggs.
The female guards the cocoons from shocks; breaking through the cap cocoon, she warms them in hot days, morning and evening, warm all day. After hatching the larva she breaks the seam of the cocoon, to increase its volume. After a few days the spiders fade and pass in the second age, the female hangs up the seams of the cocoon, and spiders in a few days leave. Restless female adjusts to his lost spiders, warms in the sun. Clutching the body of the mother, the spiders are traveling. In meadows, salt marshes, lakes, rivers and other water bodies of the female ends the journey, spiders fall from her body and remain motionless for a few seconds, then run and lead an independent life. Many females, especially small race, dying, surviving at the end of may - beginning of June the second time frizz cocoons and lay their eggs (in smaller numbers). Sitting in the hole, a closed cap, they gradually lose strength, exhausted, and by the early - mid August die.
If not for the short lifetime of karakotov and tarantulas, it would be hard to imagine their possible (number, number of contact persons and cases bite.