202 PROCEEDINGS OF THE NATIONAL MUSEUM you. 92 
disk, impunctate, feebly rugulose; lateral elevations moderate, with 
a few minute vestigial granules in third interspace; ninth interspace 
somewhat elevated ; hairs short, fine, sparse, and inconspicuous. 
Male.—Very similar to female in general habitus; frons scarcely 
flattened, more strongly punctured than in female; antennal club 
- (fig. 30) narrower than in female; pronotum and elytra slightly more 
strongly punctured throughout; elytral striae very irregular. 
Type locality —E} Seco, Puebla, Mexico. 
Host.—Pinus sp. 
Type material—Holotype and seven paratypes, U.S.N.M. No. 
55975. 
Holotype and seven paratypes collected by Donald DeLeon, at El 
Seco, Puebla, Mexico, from a 5-needled pine, the identity of which was 
not established. 
Genus PITYOBORUS Blackman 
PITYOBORUS TERTIUS, new species 
PLATE 22, FIGURES 32, 33 
Female.—Very dark reddish brown; 2.46-2.63 mm. long, holotype 
2.54 mm. long, about 2.96 times as long as wide; allied to secundus 
Blackman, but with the patches of plushlike pubescence light yellow 
and not extending so far posteriorly. 
Frons very wide between eyes, frontal rectangle about 0.41 as long 
as wide; surface piceous-brown, subopaque, finely reticulate, flattened 
from eye to eye, subconcave in median two-fifths; punctures very fine, 
rather sparse, confined to outer third at sides and above, with rather 
sparse, fine moderately long hairs. Eye large, broadly and deeply 
emarginate, moderately coarsely faceted. Antenna (fig. 32) with club 
twice as long as funicle, 1.4 times as long as wide. 
Pronotum about 1.05 times as long as wide (exclusive of pubescent 
patches); posterior outline very feebly arcuate, posterior angles 
rounded, sides weakly arcuate, scarcely constricted before middle, 
broadly rounded in front, with about 16 moderately fine serrations; 
anterior area rather sparsely, weakly, irregularly asperate; each side 
bearing an irregularly ovate patch of light yellow, plushlike pubes- 
cence, the posterior limits of which extend barely behind the middle; 
summit low, at center, transverse impression lacking in median area ; 
posterior area subopaque, finely reticulate, with very fine and shallow 
punctures and minute hairs; median longitudinal line distinctly ele- 
vated, umpunctate. 
Elytra slightly wider than pronotum, about 1.93 times as long as 
wide, sides subparallel on anterior two-thirds, then strongly, arcu- 
