NEW SPECIES OF BARK BEETLES—BLACKMAN Dap eg 
Additional locality —Alhajuelo, Panama. 
Host.—Unknown. 
Type material—Holotype, allotype, and four paratypes, U.S.N.M., 
No. 56014. 
The type, allotype, and two paratypes were taken at Trinidad River, 
Panama, May 2 and 4, 1911, and June 9, 1912; one paratype was taken 
at Alhajuelo, Panama, April 5, 1911. All were collected by A. Busck. 
Genus GNATHOTRICHUS Eichhoff 
GNATHOTRICHUS DELEONI, new species 
Male.—Light reddish brown; 3.28 mm. long, 3.32 times as long as 
wide; allied to sulcatus (keConte) and aciculatus Blackman. 
Frons convex above, somewhat flattened below, convergently acicu- 
late, with very evident punctures among aciculations; slightly in- 
definitely elevated in median line below. Eye broad oval, moderately 
‘coarsely faceted, broadly, moderately emarginate on inner margin. 
Antenna lighter in color, with club 1.7 times as long as funicle, 1.28 
times as long as wide, slightly widest through third segment, first and 
second sutures septate, strongly arcuate. Pregula normal. 
_ Pronotum 1.2 times as long as wide; sides subparallel, feebly arcuate, 
broadly rounded in front, with front margin slightly extended, with 
broad, low serrations; anterior area dark reddish brown, with some- 
‘what irregular, subconcentric rows of broad, low asperities; summit 
anterior to middle, scarcely elevated, with surface posterior to it 
scarcely flattened; posterior area yellowish brown, opaque, finely 
reticulate, with extremely minute, very indistinct punctures, glabrous; 
beaded marginal line imperfectly developed, or apparently absent. 
_Anterior tibia with only two submarginal, socketed teeth. 
Elytra scarcely wider than pronotum, twice as long as wide; sides 
_subparallel, very feebly narrowed posteriorly, very narrowly rounded 
behind with posterior margins slightly extended; surface subopaque, 
finely reticulate, minutely rugulose; punctures very minute and very 
indistinct, not in entirely regular strial rows; disk and sides glabrous. 
Declivity sloping, not truly sulcate, but feebly, indefinitely impressed 
each side of suture, lateral elevations almost entirely lacking, with a 
few very faint indications of minute, obsolete granules; vestiture 
scanty, consisting of very fine, rather short hairs. 
No female of this species has been seen. 
Type locality—Chalco, D. F., Mexico. 
Host.—Pinus leiophylla. 
Type material.—Holotype and three paratypes, U.S.N.M., No. 55997. 
The holotype and three paratypes were taken from Chihuahua pine 
(P. leiophylla) at Chalco, D. F., Mexico, by Donald DeLeon, in whose 
honor the species is named. 
