1951] Straneo — American Pterostichini 7 
6 (5) Size larger; all striae faint; aedeagus with apex 
nearly symmetrical (Fig. 5) laevigatus n. sp. 
7 (4) All striae deeply and regularly impressed; basal 
angles of prothorax obtuse but well formed. 
uniformis n. sp. 
8 (1) Size 8 mm.; hind angles of prothorax square. 
parvulus n. sp. 
Sierrobius smaragdinus, n. sp. 
Head bright green ; prothorax green with golden reflec- 
tions; elytra green with bluish reflections chiefly at sides; 
mouth piceous black; femora brown with metallic reflec- 
tions; underside slightly greenish; antennae brown; palpi 
blackish with apices ferrugineous. Length 12.8 mm. ; width 
4.1 mm. Head smooth and shining; eyes moderate, temples 
short and little convex; frontal impressions very short and 
very little impressed ; antennae moderately elongate, hardly 
reaching base of prothorax, with segments 4-11 pubescent. 
Prothorax subquadrate (3.1 by 3.8 mm.), anteriorly a little 
emarginate, with sides very little rounded, nearly parallel 
at middle, briefly narrowed to apex (width 2.6 mm.) and 
base (width 3 mm.) ; anterior angles only a little prominent, 
rounded; basal ones a little obtuse, with their apices round- 
ed; basal impressions foveiform, elongate, deep, and rather 
wide; spaces between them and lateral margins convex; 
side margins narrow, nearly linear, with two setigerous 
pores in anterior half ( $ ) or three ( $ ) and also the usual 
pore near each basal angle ; base nearly impunctate, a little 
rugose at middle, slightly margined at sides; disc only a 
little convex; median line deep, abbreviated anteriorly and 
posteriorly. Elytra subparallel, convex (7.6 by 4.1 mm.) ; 
sides slightly rounded behind base; shoulders rounded, with- 
out teeth ; basal margin strong, nearly right ; scutellar stria 
very short, with a large puncture near base ; striae very ir- 
regular, only slightly impressed, punctate; interstices only 
slightly convex, irregular, third with 4 large punctures, of 
which the first is near the third stria, the others near the 
second; seventh interstice with two apical punctures; um- 
bilicate series of 16 punctures; apical sinuation strong. 
