This depends probably, where your Bradysia material is coming from. This sciarid dipteran genus is known by more than 400 species worldwide ...
You may catch some further references from:
Heller, Hippa & Vilkamaa (2015): Taxonomy of Bradysia Winnertz (Diptera, Sciaridae) in the Northern Holarctic, with the description of four new species. European Journal of Taxonomy 122: 1-15.
Vilkamaa, Hippa & Mohrig (2012): The genus Bradysia Winnertz (Diptera, Sciaridae) in New Caledonia, with the description of thirteen new species. Zootaxa 3489: 25–44.
dear adriane; now i have seen your question here concerning species of bradysia. till today we have no complete key for this polyphyletic genus, but many descriptions of species in the literature. actually there will come my new publication with the description of the first species of pseudolycoriella from colombia, and later i will prepare the description of a new rhynchosciara from mexico. if you still need help in the sciaridae i am always ready for helping you, also you can send me your samplings for determination. for better contact here is my e-mail: [email protected]
I am starting to work with the Sciaridae group in Brazil. It is a group very difficult to identify, considering that in Brazil it is little studied. If I need help, I will contact by e-mail.
Yeah, thats great! And I will be very interesting in your investigations because in my collections i have still some undescribed species of Pseudolycoriella from brazil, and i certainly know that you will find many speciemens of pseudolycoriella in brazil. concerning this maybe we will take the chance to plan a common publication. what do you think about this?
Bradysia is most difficult, because most species rich genus of Sciaridae and is distributed worldwide. It is probably not wise to start with that genus in Brazil, where so little is known. You might however want to get in contact with Werner Mohrig, who has best studied the Neotropical Sciaridae and already prepared a lot of unpublished descriptions and drawings.