Most Ophiogomphus dragonflies (mainly in the USA) have common English names ending in "Snaketail" (rarely "Gomphid" including in Europe). Above is a male
Ophiogomphus reductus for which I can't find an English name. Its range includes the Indian subcontinent and Central Asia -- these here being in south-eastern Kazakhstan.
Above is the female Ophiogomphus reductus with a less narrow
body and less club-shaped tail than the male (also in south-eastern Kazakhstan).