CLASSIFICATION OF THE SUBFAMILY CRYPHALIN#, 59 
punctures moderately coarse and shallow, interspaces faintly rugosely punctured, ~ 
declivity moderately steep, interspace 1 flat, with row of fine granules, 2 with one 
or two small teeth, 3 and 4 with acute granules, sides not acute or serrate, apex sub- 
acuminate. Calapan, P. I., in Stephegyne diversifolia, June 18, 1903; J. L. Webb, 
collector (No. 24). Type, Cat. No. 7640, U. S. National Museum. 
Boroxylon burgdorfi, new species. 
Length, female type, 4.75 mm.; body stout, elliptical, black; pronotum with apex 
broadly rounded and serrate, rugosities moderately coarse, becoming finer to trans- 
versely elevated dorsal area and beyond the side margin, posterior dorsal and pos- 
terior lateral areas shining, coarsely, evenly punctured; front broad, flattened, sub- 
opaque, and impressed each side of broad, median, elevated line; elytra with basal 
hali and lateral area shining, remaining area opaque, striz rather deeply impressed, 
with faint, very shallow, closely placed punctures, interspaces of shining area irregu- 
larly punctured, those of opaque area including declivity with irregular minute to 
coarse granules, declivity oblique, transversely impressed toward the apex, inter- 
space 1 broad and faintly elevated, apex broadly rounded, the apical and posterior 
lateral margins elevated but not acuteor serrate. Costa Rica, Central America; Schild 
and Burgdori, collectors. Type, Cat. No. 7653, U. S. National Museum. 
Boroxylon webbi, new species. 
Length, female type, 4.05 mm.; body oblong-elliptical, shining; pronotum with 
lateral area shining and rugose to near basal angle, posterior dorsal area shining, with 
faint punctures and rugosities which become obsolete toward base; front shining, 
slightly impressed each side of median line, with posterior area coarsely punctured; 
elytra with strie distinctly impressed and punctures very coarse, interspaces narrow 
and iaintly punctured, declivity slightly impressed in middle, with rather a promi- 
nent tooth on the middle of the second interspace. Calapan, P. I., flying, June 16, 
1903; J. L. Webb, collector (No. 9). Type, Cat. No. 7641, U. S. National Museum. 
Genus ARIXYLEBORUS, new genus. 
Antennal funicle 5-jointed, joint 1 as long as 2 and 5 together, 
very broad, 2 as long as 3 and 5 together, 5 short and broader than ’ 
1; club as broad as long, sides broadly, unequally rounded; anterior 
face with one strongly recurved suture and one obscure suture; 
eyes short, elliptical, deeply emarginate. Type of genus, Arizyle- 
borus rugosipes, new species. 
Arixyleborus rugosipes, new species. 
(Pl. IV, fig. 44.) 
Length, female type, 1.6 mm.; body oblong-elliptical, dark brown; pronotum 
slightly darker and nearly as long as elytra, sides faintly narrowed toward base, 
anterior margin obtusely rounded and unarmed, rugosities fine, extending toward 
sides but to only about one-third of the dorsal area which is subopaque, faintly punc- 
tured, median and posterior lateral areas opaque, faintly punctured; front broad, 
subconvex, opaque; elytra smooth and shining toward base, opaque from toward 
base to apex, strie deeply impressed from vertex to basal smooth area, but without 
evident punctures, declivity densely opaque, convex, with strie and interspaces 
narrow, apex rounded, declivity clothed with fine yellow hairs, basal half of elytra 
and dorsal area of pronotum glabrous. Pagbilao, P. I., in Dipterocarpus grandiflorus, 
August 7, 1903; J. L. Webb, collector (No. 94e,). Type, Cat. No. 7642, U. S. National 
Museum. 
