The plastic crew seems to be not far off for release, but don't think its confirmed how many skeeters it will contain (hopefully a pair). If you're not in a rush it might be worth waiting to see the sculpts.
Also, pretty sure Som'er will have a use for some more bayou gremlins too if you pick up the new crew box
On the topic of insect wings, the following link has a nifty idea: http://23lines.blogspot.com.au/2008/07/commutatus-tyranid-gargoyle-conversion.html?m=1