kk. Mandibles chelate, for biting. Trombididæ
The genus Trombidium has recently been subdivided by Berlese into a number of smaller ones, of which some five or six occur in the United States. The mature mite is not parasitic but the larvæ which are very numerous in certain localities will cause intense itching, soreness, and even more serious complications. They burrow beneath the skin and produce inflamed spots. They have received the popular name of "red bug." The names Leptus americanus and L. irritans have been applied to them, although they are now known to be immature stages. ([Fig. 44].)
