Kerndickson 1950 Journal 43 Nov. 12 Bogota, Cundinamarca, Colombia, S. A. intense, burning variety began 10-40 minutes after being bitten. Our insect repellent, the Union Carbide and Carbon Corporation product known as "6.12" gave fairly good protection to Dr. Stebbins, less protection to me. At times, the entire skin surface of my forearms and neck was swollen, whitened, and hard to the touch from bites. Some sort of (chigger-like?) aquatic invertebrate is encountered in the pools or "charcos" of the region. It is known locally as "savanon" or "candellilla". The natives say it is encountered in the muddy, stagnant pools—not in clear, running water. Probably in the course of our work on anurans, I obtained one infestation. The creature bores under the skin, apparently preferring the skin between the digits. It is most common between the toes here; I, with well-protected feet, yet was attacked between the middle and ring fingers of one hand. The animal creates a short, suppurating tunnel through the dermis, and eventually an ulcerous