We want to start off by saying that these two plagues will "Knock your socks off" and "Blow your mind".
First, one tool we have been using for the meaning of the Chapters. The "ninth Hebrew letter" means "TET"- serpent; objective good that which appears evil but is for our improvement.
Revelation 9:1-12 "And the fifth angel sounded, and I saw a star fall from heaven unto the earth: and to him was given the key of the bottomless pit. And he opened the bottomless pit; and there arose a smoke out of the pit, as the smoke of a great furnace; and the sun and the air were darkened by reason of the smoke of the pit. And there came out of the smoke locusts upon the earth: and unto them was given power, as the scorpions of the earth have power. And it was commanded them that they should not hurt the grass of the earth, neither any green thing, neither any tree; but only those men which have not the seal of G-d in their foreheads. And to them it was given that they should not kill them, but that they should be tormented five months: and their torment was as the torment of a scorpion, when he striketh a man. And in those days shall men seek death, and shall not find it; and shall desire to die, and death shall flee from them. And the shapes of the locusts were like unto horses prepared unto battle; and on their heads were as it were crowns like gold, and their faces were as the faces of men. And they had hair as the hair of women, and their teeth were as the teeth of lions. And they had breastplates, as it were breastplates of iron; and the sound of their wings was as the sound of chariots of many horses running to battle. And they had tails like unto scorpions, and there were stings in their tails: and their power was to hurt men five months. And they had a king over them, which is the angel of the bottomless pit, whose name in the Hebrew tongue is Abaddon, but in the Greek tongue hath his name Apollyon. One woe is past; and, behold, there come two woes more hereafter. (KJV)
In verse 1 John saw "a star fall from heaven". Sometimes angels are referred to as "stars". This "fallen star" appears to be Satan. (See Isaiah 14:12-17; Luke 10:18; Rev 12:7-9)
The "bottomless pit" is "abyssos" in Greek. "The Abyss". This is another name for hell.
Smoke escapes from the pit and when there's smoke there's fire. This is an excellent verse showing us that Hell is a literal place with Fire and Smoke. (See also Luke 16:19 31)
Starting in verse 3 we have a description of the "locusts" that come out of the pit. They are no ordinary locusts. It appears that they have some locust type instincts because they are specifically told not to "hurt the grass" which are normally what locusts do.
They are not to hurt the 144,000 sealed Jewish men but they are to torture the rest of mankind for 5 months but they are not to kill them. Five months is the ordinary time in the year during which locusts commit their ravages.
They have 1) crowns like gold, 2) faces like men, 3) hair like a woman, 4) jagged sharp teeth like a lion, 5) breastplates of iron, 6) wings was as the sound of chariots, and 7) tails like scorpions.
The sting of a scorpion is very painful and will leave the area black and blue; the person will have convulsions of agony. Scorpion stings can kill the very young, the sickly, and the elderly. In this case people will try to die but not be able to.
It seems these locusts many be normal locust size but it could be that they are horse size! Imagine how HORRIBLE this will be! Swarms of locusts, stinging like scorpions. Just to look at these little guys would scare you half to death. It's bad enough when you sit outside on a summer evening and are attacked by mosquitoes; imagine trying to get away from these locusts. Open the door to go inside and you have a house full of them! They are described as having "breastplates of iron" this symbolizes that they could not be destroyed. The "wings sounding like chariots" implies speed and the impossibility of evading their attack.
There is a king over the locusts. His name in Hebrew is "Abaddon"
meaning "a destroying angel". In Greek his name is Apollyon meaning
"a destroyer" (i.e. Satan). These locusts appear to be demon possessed.