While collecting at Brownwood, Texas, in the latter part of May, 1904, I secured half a dozen three- and four-inch sections of a Mesquite tree, about three inches in diameter, that had been cleared from land the preceding fall. The sections were infested with Coleopterous larv♀, and were put into a breeding box to see what would develop. The first transformation into imagoes was in July, when a small Ptinid, Trogoxylon Californicum, Lec., began to emerge in numbers.