NEW SPECIES OF BARK BEETLES—-BLACKMAN 203 
ately narrowed, the 2 sides meeting at suture in an obtuse angle; sur- 
face subopaque to feebly shining, reticulate, punctures rather deep 
and moderately fine, in nearly regular strial rows, only first striae 
impressed; interspaces with very few, somewhat smaller punctures. 
Declivity convex, suture rather wide, slightly elevated, with a row 
of sparse, obsolescent granules; first and second striae with punctures 
nearly obsolete, first striae impressed; second interspace flat, not 
depressed, devoid of punctures except near apex; third interspace with 
granules nearly entirely obsolete. Disk and sides nearly glabrous but 
with rather conspicuous hairs on declivity. 
Male—Similar in color, size, and general habitus: frons flattened 
between eyes, the surface subopaque, reticulate, with sparse, small 
punctures giving rise to a few hairs which are shorter than in female, 
median line broadly elevated to form a very blunt carina; pronotum 
similar to that of female, but with the pilose areas lacking, corre- 
sponding area slightly depressed, finely sparsely punctured, with a few 
small asperities on anterior half; elytra similar to those of female, 
but with the second interspace on declivity very feebly subsulcate. 
This species is closely allied to Pityoborus secundus Blackman, but 
is distinguished by the slightly more slender form, the distinctly 
smaller patch of pronotal pubescence, with its posterior outline nearly 
straight, and by the weaker development of the declivital sulcus and 
the granules on both suture and third interspace. Pityoborus comatus 
(Zimmerman) is slightly smaller and stouter than the two more 
western species. 
Type locality—Chalco, D. F., Mexico. 
Host.—Pinus leiophylla. , 
Type material—Holotype, allotype, and seven paratypes, U.S.N.M. 
No. 55980. 
The type material was collected January 27, 1936, from Pinus 
leiophylia, Chaleo, D. F., Mexico, by Donald DeLeon. 
Genus SPERMOPHTHORUS Costa Lima 
SPERMOPHTHORUS CAESALPINIAE, new species 
PLATE 21, FIGURES 24, 25 
Female.—Reddish brown; 1.91 mm. long, 2.65 times as long as wide. 
Frons flattened at each side of the elevated, rather broad median 
carina; rather finely, closely punctured, with rather fine, rather short 
hairs. Eye of moderate size, coarsely faceted, less than a third divided 
by emargination. Antenna (fig. 25) somewhat similar to those of 
various Pztyophthorus but with scape more strongly clavate, funiculus 
with four distal segments more strongly, progressively widened, and 
the club relatively smaller; club 1.28 times as long as wide, 1.11 times 
