8 
Psyche 
[March. 
Prosternum slightly depressed between coxae ; pro-episterna 
smooth; metepisterna small, nearly as long as wide; pros- 
ternal process margined; abdominal segments sulcate and 
with series of coarse punctures across their bases; anal 
segment with one puncture each side ( 8 ) or with two ( $ ) . 
Microsculpture of elytra rather indistinct. Aedeagus as 
shown in Fig. 3. 
Holotype 8 (Museum of Comparative Zoology, Type No. 
28,426) and allotype 2 (my collection) from the north- 
western Sierra Nevada de Santa Marta, Colombia, 12,000 
ft., Feb. 11, 1929 (Darlington). 1 The specimens were taken 
in the 'paramo zone above the forest line. 
Sierrobius bistriatus, n. sp. 
Head and prothorax metallic dark blue; elytra greenish 
blue with slight metallic reflections; underside brown with 
metallic reflections ; legs, antennae, and mouth ferrugineous 
brown. Length 11.2 mm.; width 3.7 mm. Head as in pre- 
ceding species. Prothorax with sides more rounded, more 
narrowed posteriorly ; only one seta on each side in anterior 
half of lateral margin. Elytra shaped as in the preceding 
species, but with the shoulders more rounded; striae very 
faint excepting the third and fourth ones, which are very 
lightly impressed; third interstice with three large punc- 
tures, of which the first is near the third stria, the others 
near the second. Underside as in smaragdinus. Hind tibiae 
simple. Aedeagus of wholly different shape (Fig. 4.) 
Holotype 8 (Museum of Comparative Zoology, Type No. 
28,428) from the northwestern Sierra Nevada de Santa 
Marta, Colombia, 8-11,000 ft., Feb. 10-12, 1929 (Darling- 
ton). The type is unique. It comes from the highest (“tem- 
perate”) moutain forest. 
Sierrobius laevigatus, n. sp. 
Upper surface metallic violaceous red with greenish re- 
flections, lightly alutaceous, moderately shining; underside 
blackish ; appendages brownish piceous. Length 16 mm. ; 
1 All specimens taken in the Sierra Nevada de Santa Marta by P. J. 
Darlington Jr. were collected along the trail that ascends the Sierra 
from Rio Frio. 
