210 PROCEEDINGS OF THE NATIONAL MUSEUM VoL. 92 
spaces weakly convex, with fine uniserlate punctures and moderately 
numerous, conspicuous, cinereous hairs, stouter and longer than those 
on disk. 
Maie.—Very similar to female, but with frons less flattened, trans- 
versely impressed below, with median carina somewhat stronger, hairs 
shorter and less numerous. 
Type locality—Jalapa, Veracruz, Mexico. 
Host.—Alnus sp. 
Type material—Holotype, allotype, and six paratypes, USNM. 
No. 55984. 
Holotype, allotype, and 6 paratypes collected from Adnus sp., at 
Jalapa, Veracruz, Mexico, by Donald DeLeon, February 9, 1936. 
PITYOPHTHORUS SUBOPACUS, new species 
Piate 23, Ficures 41, 42 
Female.—Dark reddish brown, 1.8-2.2 mm. long; holotype 2.11 mm. 
long, about 2.93 times as long as wide. 
Frons convex, slightly flattened on a semicircular area outlined by 
an indented margin, surface subshining, reticulate, somewhat rugose, 
with fine, rather sparse punctures and very fine, sparse hairs of med- 
erate length; median carina usually poorly developed. Eye moder- 
ately finely faceted, half divided by wide, deep emargination. An- 
tennal club (fig. 41) rather narrow, 1.3 times as long as funicle, more 
than one-third longer than wide, widest through second segment; 
first two sutures nearly straight and partly septate, third suture 
strongly arcuate, not septate. 
Pronotum nearly 1.2 times as long as wide, widest slightly behind 
middle, posterior angles strongly rounded, sides distinctly arcuate 
from base to lateral constriction, broadly rounded in front; anterior 
margin with rather strong, sharp serrations; anterior area with irregu- 
lar concentric rows of rather sharp asperities; summit rather high, 
slightly in front of middle, with a distinct transverse impression 
behind it; posterior area subopaque to weakly shining, with deep, 
moderitely sparse punctures of moderate size, interstices reticulate; 
median line moderately wide, impunctate, niGt elevated; disk with 
short, nearly invisible hairs. 
Elytra wider than pronotum, about 1.82 times as long as wide; sides 
nearly straight and subparallel on anterior three-fourths, moderately 
rounded behind; surface feebly shining or subopaque, finely reticu- 
late; strial punctures deep, moderately large, in regular strial rows, 
only first striae impressed ; interspaces nearly flat, nearly entirely im- 
punctate except near declivity; vestiture of disk and sides consisting 
nearly entirely of minute, short, fine hairs from strial punctures. De- 
clivity arched, not sulcate, suture wide, slightly elevated, not granulate; 
