You can speak, read, and write Common and Undercommon.

Your Intelligence score increases by 2 and one other ability score of your choice increases by 1.

Arthrops do not live long. Larvae turn to pupae around 2 years old. Upon hatching to a full grown Arthrop, they are mature, usually around 3. Arthrops never live older than 50 years.

Arthrops, due to their insect minds, are almost always lawful.

 Arthrops vary very widely in height, from barely 4 feet to well over 6 feet tall. Your size is Medium.

Your base walking speed is 30 feet.

You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.

Your body has  certain insect characteristics. You choose one insect adaptation at 1st level, a second at 3rd level, and a third at 5th level.

Camouflage - Choose one type of terrain: arctic, coast, desert, forest, grassland, mountain, swamp, or the Underdark. When you are located within these terrains, you have advantage on Dexterity(stealth) checks.

Elytra Wings- You have transparent wings. You have a fly speed equal to your walking speed.

Tarsal Claws - You have claws modified for climbing. You can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Burrower - You gain a burrowing speed equal to your walking speed. You can use your burrowing speed to move through sand, loose earth, mud, or ice, not solid rock.

Mandibles - Your mandibles are a natural weapon, which you can use to make an unarmed strike. If you hit with it, the target takes piercing damage equal to 1d6 + your Strength modifier, instead of the damage normal for an unarmed strike. Immediately after hitting, you can try to grapple the target as a bonus action. Your mandibles can’t precisely manipulate anything and can’t wield weapons, magic items, or other specialized equipment.

Hardened Exoskeleton - Your skin in places is covered by a thick shell. You gain a +1 bonus to AC when you’re not wearing heavy armor.

Spit Venom - You know the Poison Spray and Acid Splash cantrips.

Hive Mind - You can speak telepathically to any creature you can see and are familiar with, provided the creature is within a number of feet of you equal to 10 times your level. You don’t need to share a language with the creature for it to understand your telepathic utterances, but the creature must be able to understand at least one language. The creature can only reply within the turn you spoke to it. This process of communication is slow and limited, allowing you to transmit and receive only simple ideas and straightforward concepts.

Saltitorial Legs - You have enlarged legs modified for jumping. Your jump distance is tripled.

Pollinator - You have advantage on Intelligence(Nature) checks with determining information about plants, flowers, and bugs.

Ocellus Eyes - You have false eye patterns on your body, confusing the enemy. You cannot be surprised.

Spinnerets - You can cast the Web spell once a day. You can also secrete a sticky adhesive to stick 2 objects together. One application can cover a 1-foot square surface. The adhesive takes an action to apply and 1 minute to set. Once it has done so, the bond it creates can be broken only by the application of Universal Solvent, Oil of Etherealness, or similar means. The adhesive cannot be stored or preserved.

Probiscus - Your needle-like mouth is a natural weapon, which you can use to make an unarmed strike. If you hit with it, the target takes piercing damage equal to 1d4 + your Strength modifier, instead of the damage normal for an unarmed strike. The target then must succeed a Constitution Saving throw or take necrotic damage equal to your character level and the target’s hit point maximum is reduced by an amount equal to the necrotic damage taken. If this effect reduces a creature’s hit point maximum to 0, the creature dies. This reduction to a creature’s hit point maximum lasts until the creature finishes a long rest or until it is affected by a spell like greater restoration.

Compound Eyes - Your unique bug-like eyes give you proficiency in the Perception skill.

Stinger - You have a stinger as a natural weapon, which you can use to make an unarmed strike. If you hit with it, the target takes poison damage equal to 1d4 + your Dexterity modifier, instead of the damage normal for an unarmed strike. The target then must succeed a Constitution Saving throw or be poisoned for one minute. You can use this feature only once per long rest.