The wings of the mosquitoes...

[auron froth]

Which sentence is correct?

The wings of the mosquitoes are different from those of other insects in that there are scales on the veins of them.

The wings of the mosquitoes are different from those of other insects by the presence of scales on the veins of them.
If neither of them is correct, I would like to know why. Thanks.

 

[Rover_KE]

Welcome to the forum, auron froth.

I have changed your thread title to comply with the following posting guideline:

'Thread titles should include all or part of the word/phrase being discussed.'

A reply will follow shortly.

 

[Tarheel]

Which sentence is correct?

The wings of the mosquitoes are different from those of other insects in that there are scales on the veins of them.

The wings of the mosquitoes are different from those of other insects by the presence of scales on the veins of them.
If neither of them is correct, I would like to know why. Thanks.

I would use the first one but omit "of them" there.

 

[Rover_KE]

I would delete 'the' before 'mosquitos' (the alternative spelling which I prefer).

 

[Tarheel]

Good point!

 

[Rover_KE]

A click on 'Like' would have sufficed.