THE FAMILY 1YCTiD.IE. 123

 Lyctus brunneus (Stephens).
 Lyctus parasiticus Stephens, 1829, p. 94.
 Xylotrogus brunneus Stephens, 1830, p. 116, pl. 18, fig. 4; Seidlitz, 1875, p. 160.
 Lyctus glycyrrhizx Chevrolat, 1829-1838, pp. 191-192, pl. 4 1, fig. 3.
 Lyctus rugulosus Montrouzier, 1861, p. 266.
 Lyctus brunneus (Stephens) Wollaston, 1854, p. 152; Erichlisoni, 1877, p). 17; Reitter,
 1885, p. 100; Reitter, 1906, p. 423.
 Lyctus caroline Casey, 1891, pp. 13-14.
 This species, while allied to L. politus n. sp., is readily distinguished by its larger size and coarser structure throughout and more acute anterior angles of prothorax; the epistoma also is more depressed, its posterior angles as in planicollis Le Conte. The series of specimens is very constant, except that there is the usual variation in size and color. A single specimen from Philadelphia, Pa., is more slender, the prothorax narrower and more constricted behind, with the sides straight, and the anterior margin more strongly arcuate. It is probably best placed here for the present. A series of 3 specimens from Mr. Reitter shows considerable variations, more especially in the shape of the prothorax, and one individual has the pronotum much more coarsely punctured.
 Material examined.-A series of 14 specimens. The species is
widely distributed throughout the world.
 Lyctus pubescens Panzer.
 Lyctus pubescens Panzer, 1793, fasc. 4, fig. 17; Erichson, 1877, p. 16; Reitter, 1878,
 p. 196; Reitter, 1885, p. 99.
 Lyctus bicolor Comolli, 1837, p. 41; Seidlitz, 1875, p. 160.
 Lyctus caucasicus Tournier, 1874, p. 412; Reitter, 1878, p. 196; Reitter, 1885, p. 99.
 Lyctus pubescens v. caucasicus (Tournier) Reitter, 1906, p. 423.
 The species is very distinct. It is perhaps more closely allied to brunneus Stephens than any other, both in elytral and prothoracic structure, though very distinct from it. It is remarkable in having the prothorax very much darker than the elytra, a character seldom met with in this family.
 Material examined.-Two specimens from Mr. Reitter are labeled "Silesia, on Willow." One of them has the prothorax strongly narrowed posteriorly, the other much less, although distinctly so. The species occurs in Europe, but up to the present time it has not been recorded from the United States.
 Lyctus opaculus Le Conte.
 Lyctus opaculus Le Conte, 1866, p. 103; Casey, 1890, p. 324; Casey, 1891, p. 13.
 This species is remarkably distinct and easily separated by the narrow, convex prothorax, the anterior angles being very broadly rounded, the side margins strongly convergent posteriorly, the surface opaque and very densely subrugosely punctured, the median