Difference between "蝈蝈", "蟋蟀" and "蛐蛐" (Also: 纺织娘)?
according to wikipedia(and my understanding as a native speaker):
蝈蝈,纺织娘 should be two sub species belong to the family: https://en.wikipedia.org/wiki/Tettigoniidae

蛐蛐,蟋蟀 is the same thing: https://en.wikipedia.org/wiki/Cricket_(insect)