218 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 9% 
obsolete; lateral convexities higher than suture, very feebly granulate 
on third interspace; suture and lateral elevations with erect hairs of 
moderate length. 
Male—Slightly smaller and stouter than female (1.74 mm. long, 
about 2.88 times as long as wide); frons convex, transversely im- 
pressed below, transversely carinate above; elytra less acuminate 
behind, punctures somewhat coarser, strial rows less regular; with 
granules of lateral convexities of declivity slightly coarser and hairs 
more conspicuous. 
Type locality —Jacala, Hidalgo, Mexico. 
Host.—Pinus sp., probably lawsoni. 
Type material—Holotype, allotype, and 12 paratypes, U.S.N.M. 
No. 55991. 
The type material was taken from Pinus sp., tentatively identified 
as P. lawsoni, by Donald DeLeon, at Jacala, Hidalgo, Mexico, January 
18, 1936. 
The species is most closely allied with Pityophthorus cacuminatus 
Blandford among known Central American forms but differs especially 
in the different structure of the elytral declivity. Among American 
forms described from north of Mexico it is fairly close to P. acutus 
Blackman and P. solers Blackman, but is readily recognized as dif- 
ferent from both of these. 
PITYOPHTHORUS PEROTEI, new species 
Female —Reddish brown, 1.51-2.08 mm. long; holotype 1.84 mm. 
long, 2.77 times as long as wide; allied to amoenus Blanford but with 
declivital suleus much shallower. 
Frons flattened on more than a semicircle, occupying about four- 
fifths of diameter between eyes, with a slightly impressed margin, 
closely and finely punctured, with very fine, moderately long hairs, 
those at periphery slightly longer and incurved. Eye finely faceted, 
deeply and broadly emarginate. Antennal club broad oval, first 
two sutures weakly arcuate, partly septate, third suture strongly 
arcuate, not septate. 
Pronotam about 1.12 times as long as wide, widest at base, posterior 
margin weakly arcuate, posterior angles rounded, sides feebly, arcu- 
ately convergent behind, scarcely constricted in front of middle, 
broadly rounded in front; anterior margin with numerous broad, 
low serrations; anterior area with numerous broad, low asperities in 
irregularly concentric rows; summit moderately elevated, with a weak, 
broad, transverse impression ; posterior area moderately shining, with 
numerous rather small, rough punctures, many with minute granules, 
interstices somewhat reticulate; median line rather narrow, impunc- 
tate, not elevated; disk subglabrous. 
