Dear Isaac,

Hope you will find the following site very useful!

http://texasinsects.tamu.edu/

There is a book "Kaufman Field Guide to Butterflies of North America"  by

Jim P. Brock, ‎Kenn Kaufman.

Good luck!

Thanks, but i need one more specialized in flies. I can get it on line or fiscally.

I all ready find the book and I think it will be useful to identified the butterflies in the same project.

Thanks again 

Manual of Central American Diptera could help

Thanks, I would book for it. 

Es dificil que encuentres una referencia mejor que las que te dijeron mas arriba, pero si encuentras algo mas cuentanos por aca!

Diptera of Costa Rica is a good book with illustrations about the different families. More information in the following link www.inbio.ac.cr/papers/diptera/ing/twig.htm

Best wishes

Thanks

Dear Isaac,

Please check the attached publications. May it be some help for you.

Best,

Tharindu

Article Guide to the Identification and Geographic Distribution of L...

Article Mosquito Fauna Associated with Aedes aegypti (Diptera: Culic...

Article A revision of the shore-fly genus Lamproclasiopa Hendel (Dip...