Abstract
A Xenicotela pardalina male of the Cerambycidae (Coleoptera) has been found to contain both non-B- and B-carrying germ cells, showing an overwhelming preponderance of the B-carrying ones. One to six Bs are observed in the examined spermatogonia and one to five Bs in about 94.2% of the examined MI-cells. The behavior of the Bs at MI is varied as shown in Table I and the association of a pair of Bs (BII) and the incorporation of an Xyp with a B (XyBp) are especially noted, but the B did not associate with any of the regular autosomal bivalents.
