NEW SPECIES OF BARK BEETLES—BLACKMAN 201 
Type locality —Dept. Santander, Colombia, South America. 
Host.—Psidium quajava. 
Type material—Holotype, U.S.N.M. No. 56017. 
The holotype was taken from the dried branches of guava (Psidiwm 
guajava), Dept. Santander, Colombia, at an elevation of 700 to 1,300 
meters, by R. P. Roba, in whose honor the species is named. 
Genus MYELOBORUS Blackman 
MYELOBORUS DELEONI, new species 
PLats 22, Fieures 29-31 
Female.—Dark piceous-brown, with elytra and summit of pronotum 
lighter ; 3.07-3.66 mm. long, holotype 3.56 mm. long, about 2.65 times 
us long as wide; larger than any species previously described. 
Frons very wide between eyes, frontal rectangle about 0.4 as long 
as wide; convex, slightly flattened below, surface brightly shining, 
finely, moderately sparsely punctured, median carina distinct on epis- 
toma and above level of eyes, often interrupted above epistoma, vari- 
able; hairs short and inconspicuous. Eye with moderate facets, half 
divided by a moderately wide emargination. Antenna (fig. 31) testa- 
ceous, with club subequal in length to funicle, widest through second 
segment, first two sutures strongly annulate, distinctly arcuate, neither 
septate, third suture faintly indicated by incomplete row of setae. 
Pronotum 1.1 times as long as wide, widest posteriorly, posterior 
outline nearly straight, posterior angles slightly rounded; sides arcu- 
ately narrowed to the faint constriction, rather broadly rounded in 
front, anterior margin with 6 to 8 small serrations; anterior area 
with many moderately developed asperities in*irregularly concentric 
rows; summit high, with rather strong transverse impression behind 
it; posterior area shining, rather finely, moderately closely punctured ; 
median line wide, impunctate, slightly elevated; hairs short and 
inconspicuous. 
Elytra slightly wider than pronotum, about 1.6 times as long as 
wide, widest at about middle, sides subparallel, faintly arcuate on 
anterior three-fourths, broadly rounded behind; surface light reddish 
brown, shining; disk with striae, except first, not impressed, punc- 
tures moderately coarse, rather close, in irregular rows, especially 
near base; interspaces flat, somewhat rugulose, the punctures notably 
smaller and sparse; more numerous and larger on sides; disk sub- 
glabrous. Declivity with sulcus of moderate depth and width, strial 
punctures scarcely smaller than on disk, except in first stria, which is 
strongly impressed ; suture moderately elevated, moderately wide, with 
only minute vestiges of granules; second interspace not wider than on 
464520—42--—4 
