1951] 
Straneo — American Pterostichini 
9 
width 5.1 mm. Head stouter than in the preceding species, 
with shorter mandibles and less convex eyes. Prothorax 
of nearly the same shape as in bistriatus but more elongate 
(4 by 4.5 mm.), with a single seta on each side in the an- 
terior half of the lateral margin as well as the usual one at 
each basal angle. Elytra smooth, striae all faint, not im- 
pressed (but ninth stria well impressed as usual) ; three 
punctures on each side in the third interstice; umbilicate 
series of 15 punctures. Underside as in the other species. 
Hind tibia with a stout tooth ventrally (Fig. 6). Elytral 
microsculpture very regular, isodiametric. Aedeagus with 
apex rather regular (Fig. 5). 
Holotype $ (Museum of Comparative Zoology, Type No. 
28,425) from the northwestern Sierra Nevada de Santa 
Marta, Colombia, 4-8,000 ft., July 20, 1928 (Darlington). 
The type is unique. It was found on the ground in heavy 
“subtropical zone” forest. 
Sierrobius un if or mis, n. sp. 
Brown; head, prothorax, and elytra without metallic re- 
flections; scarcely shining, elytra alutaceous. Length 14 
mm. ; width 4.7 mm. Head as in preceding species, but with 
frontal impressions wide and deep, though short. Protho- 
rax transverse (3 by 4.1 mm.), with sides regularly and 
equally narrowed and rounded anteriorly and posteriorly; 
anterior margin distinctly emarginate; anterior angles lit- 
tle prominent, obtuse, well rounded; basal angles obtuse, 
with their apices scarcely blunted; basal impressions deep, 
rather elongate; spaces between them and lateral margins 
slightly impressed near base, as if there were poorly marked 
external basal impressions; basal margin vestigial, visible 
only at sides ; lateral margin narrow, with a single puncture 
on each side in anterior half and the usual puncture at each 
basal angle ; disc moderately convex, with median line rather 
deep, almost reaching base. Elytra convex, subparallel (8.1 
by 4.7 mm.) ; scutellar stria distinct, without basal pore; 
striae well impressed, regular; interstices rather convex, 
third with three or four dorsal punctures. Underside as in 
the other species of the genus ; anal segment of $ with two 
