NEW SPECIES OF BARK BEETLES—BLACKMAN 213 
through second and third segments; first suture nearly straight, second 
distinctly arcuate, each with strong but incomplete septum. 
Pronotum about 1.05 times as long as wide, widest at base, posterior 
margin nearly straight, posterior angles rounded; sides feebly con- 
vergent and arcuate from base to constriction slightly anterior to 
middle, moderately rounded in front; anterior margin with 8 to 10 
serrations; anterior area with numerous irregularly arranged asperi- 
ties; summit prominent, slightly in front of middle, with a broad, 
rather deep, transverse impression posterior to it; posterior area some- 
what shining, finely, moderately closely punctured, interstices finely 
reticulate ; median line moderately wide, impunctate, scarcely elevated ; 
disk with short, inconspicuous hairs, those on sides larger. 
Elytra slightly wider than pronotum and 1.9 times as long, about 
1.82 times as long as wide; sides straight and subparallel on anterior 
three-fourths, then narrowed to the subtruncate posterior margin; 
surface moderately shining; strial punctures rather coarse, deep, close, 
in nearly regular rows, only first striae impressed; interspaces very 
finely reticulate, nearly impunctate; disk nearly devoid of hairs except 
for very minute ones from strial punctures. Declivity much less abrupt 
than in crassus, deeply, moderately broadly sulcate, brightly shining; 
suture narrow, slightly elevated, with fine granules becoming obsolete 
near apex; punctures of first and second striae obsolete; lateral con- 
vexities high (neither so abrupt nor so high as in erassus), with a 
rather close series of moderate-sized granules in the third interspace 
(smaller and more numerous than in crassus) ; convexities and sides 
of declivity with numerous, strong punctures bearing long, fine hairs 
(much longer than in crassus). 
Male—Similar to female, but slightly stouter; frons slightly flat- 
tened below, with strongly elevated median carina, highest well above 
epistoma; pronotum as broad as long, with anterior serrations coarser 
than in female; elytra with punctures appearing somewhat confused, 
due to numerous similar-sized punctures on interspaces; lateral con- 
vexities of declivity higher and more abrupt than in female, with sulcus 
deeper and narrower. 
Type locality —Amecameca, D. F., Mexico. 
Host Pinus sp. 
Additional host.—Abies religiosa. 
Type material—Holotype, allotype, and seven paratypes, U.S. N. M. 
No. 55987. 
Holotype and two paratypes collected from unidentified 3-needle 
pine and allotype and four paratypes from Abies religiosa, at Ame- 
cameca, D. F., Mexico, by Donald DeLeon. 
