458 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 92 
ever, in the Southwestern and the Pacific States several closely related 
species such as wtahensis Swaine, aciculatus Bruck, and juniperi 
Swaine are known to occur. None of these, however, agrees with 
serratus, but aside from its smaller size utahensis approaches it most 
closely. It seems lkely that serratus will be found in the South- 
western States. 
PHLOEOSINUS UTAHENSIS Swaine 
Phloeosinus utahensis Swatnr, Can. Ent., vol. 47, p. 363, 1915; Canada Dept. 
Agr., Ent. Branch, Bull. 14, pt. 2, p. 68, 1918.—W. J. CHAMBERLIN, Bark and 
timber beetles of North America, p. 175, 1989. 
Male.—Black, with elytra reddish brown to piceous brown; 2.3-3.3 
mm. long, nearly exactly twice as long as wide. 
Frons moderately wide between the eyes, frontal rectangle about 
0.68 as long as wide, epistomal lobe nearly lacking; surface black, 
shining, coarsely rugose-granulate-punctate, densely at sides and 
below; with a rather wide, moderately deep, arcuate, transverse im- 
pression; with a rather faint median carina on lower half, often 
interrupted by granules below; hairs fine and short. Eye about 
three times as long as wide, more than half divided by a rather nar- 
row emargination. Antenna with club less than twice as long as 
wide, all of sutures distinctly oblique. 
Pronotum about 1.16 times as wide as long, widest at posterior 
angles; sides regularly, arcuately convergent from base to lateral 
constriction just behind broad anterior margin, distinctly impressed 
across dorsum; surface piceous, brightly shining, moderately coarsely, 
rather closely and deeply punctured, subgranulately punctured at 
sides; median line very feebly elevated behind, punctured as rest of 
disk; lateral calli small; hairs fine and short. 
Elytra distinctly wider than pronotum, about 1.33 times as long 
as wide, slightly widest just behind middle; sides feebly arcuate, 
subparallel on anterior two-thirds, semicircularly rounded behind; 
surface moderately shining; striae rather narrow, rather deeply im- 
pressed, with small but distinct, rather close punctures; interspaces 
wide, weakly convex, densely granulate-punctate and asperate on 
anterior disk, most of asperities and granules lacking on posterior 
disk, asperities becoming uniseriate on sides behind; disk and sides 
with rather numerous, fine, short hairs on interspaces. Declivity 
with first interspace convex, with mesal half finely, closely punctured, 
lateral half with a row of sparse, coarse, black serrations; second 
interspace wide, weakly convex, finely punctured, not serrate, but 
usually with a single tooth near extreme end; third interspace 
strongly elevated, with rather numerous, black, moderately coarse 
serrations and fine punctures; fifth, seventh, and ninth interspaces 
