Coleoptera 7 E 
Genus Polygraphus Erich. 
Erichson, Weig. Archiv., 1 :57. 
Polygraphus rufipennis Ky. 
Plate II, figure 2. 
Kirby, Faun. Bor. Amer., 4:193, tab. 8, fig. 2, Apate {Lepisomus) 1837, 
Apate {Lepisomus) nigriceps Ky. Kieby, loc. cit. 194, Polygraphus saginatus 
Mannh. Mannerheim, Bui. Mosc, 237, 1853; Apate (Lepisomus) hrevicornis 
Ky. Kirby, loc. cit., 194, (Probably not rufipennis, but injured and unrecog- 
nizable.) 
A stout cylindrical species, clothed with scales. Length, 2 mm. to 3 mm.', 
colour black, elytra very dark piceous. 
Description of the Female. — -The head has the front flat, shining, 
finel}^ and closely punctured, and rather densely clothed with short j^ellow 
hairs, denser in a subcircular fringe about the margin of the front, extending, 
about the base of the mandibles and between the sections of the eyes; the vertex 
and gense with dense and minute punctulations and a few large, shallow punc- 
tures, almost glabrous; the eyes completely divided and surrounded by a narrow 
shining border; the epistomal margin raised, shining, and very broadly emar- 
ginate; the antennal funicle usually with six segments, the pedicel large, the- 
club unsegmented, subacute at the tip, closely pubescent. The pronotum is 
two-thirds as long as wide; the caudal margin subtruncate, bisinuate, the sides 
on caudal half straight, slightly convergent, deeply, suddenly constricted in 
front of the middle, front margin broadly arcuate, feebly emarginate at middle 
line; closely finely granulate-punctate and clothed with short scale-like hairs; 
with a very fine indistinct median raised line. 
The elytra are two and one-half times as long as wide; as wide as the 
pronotum at the base; the bases individually moderately arcuate, finely raised 
and crenulate, the striae very faintly indicated; the elytra closely, finely asperate- 
punctate, with a row of coarser asperities along each interspace and these 
larger asperities confused and numerous towards the base of the disc; the strial 
punctures with minute slender inconspicuous setse; the numerous punctures of 
the interspaces with short, blunt, stout, scale-like hairs, with those from the 
row of coarser asperate punctures longer, particularly towards and upon the 
declivity and on the sides; so the pubescence is rather closely subscale-like, 
with a row of longer, lighter coloured, stout hairs on each interspace, and the 
finely asperate surface showing through. 
The Male. — The male has the front convex above with two small approx- 
imate tubercles arranged transversely on the middle line; impressed cephalad of 
the tubercles; the pronotum usually shorter, and more deeply constricted in 
front. 
Variations. — The size varies from 2 mm. to 3 mm. in length. The colour 
varies from piceous to nearly black. The front of the male has sometimes 
only one frontal tubercle and the anterior impression varies in depth. The 
most interesting variation is in the segmentation of the antennal funicle. This 
is typically six-segmented, with the second segment small and the distal segments 
widened. Not infrequently however, we find a reduction in the number. Two 
more common conditions are with four segments on the outer part of the funicle 
of which the second segment is partly divided by a deep suture, or with the 
second and third segments almost entirely fused. It is very evident that the 
segmentation of the antennal funicle is a variable character in this species, 
as in other allied species. This subject is further referred to under the Genus 
Polygraphus, Doin. Ent. Br., Bull. 14, Part 2. 
65861—24 
