Your specimens: Guyana 1, 2 & 3 are Acanthocinini. The web sites I mentioned previously might be of help. Since I don't have these species in my collection, I won't try to match your picture with an Internet picture. There are many undescribed species in this tribe in the Neotropics.
Guyana: Nyssodrysternum signiferum
Posted - 02/04/2015 : 03:53:14
