Arthropod is a really general classification; it's a phylum, man, there are a whole lot of disparate critters that fall under this category. From wikipedia: "An arthropod is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and jointed appendages."
The insect that resembles a giant mosquito is called a crane fly.
The insect that resembles a giant mosquito is called a crane fly.
The big insect that looks like a mosquito is called a crane fly.
The insect that looks like a giant mosquito is called a crane fly.
Mosquito
The insect that looks like a big mosquito is called a crane fly.
The insect that looks like a giant mosquito is called a crane fly.
The insect that looks like a huge mosquito is called a crane fly.
The insect that looks like a large mosquito is called a crane fly.
The insect that looks like a giant mosquito is called a crane fly.
The insect that looks like a large mosquito is called a crane fly.
The insect that looks like a mosquito but is bigger in size is called a crane fly.