1935] 
West Indian Carabidde 
179 
or slightly more greatest width; width basal peduncle *4 
greatest width ; side margins narrow, entire, slightly 
crenate basally; disk with usual impressions, finely, not 
densely punctate. Elytra rather closely punctate, punc- 
tures relatively much coarser than in other American 
Perileptus, sutural stria entire except at base, other striae 
scarcely indicated; usual 3 setigerous punctures on posi- 
tion of 3rd stria about 1/5 from base, behind middle, and 
about 1/10 from apex. Male with 2 basal joints each front 
tarsus dilated as usual. Length 1.8-1. 9; width about 
0.5 mm. 
Jamaica and Haiti: holotype $ (M. C. Z. no. 22020) and 
1 2 paratype from Rio Cobre, 5 mi. above Spanishtown, 
Jamaica, Aug. 29 ; 1 $ paratype from Ennery, Haiti, Sept. 
6 ; all washed from bars of river gravel. 
Also a member of the areolatus group of Perileptus, but 
very distinct within the group because of its small size, 
rather stout antennae, relatively coarsely punctate elytra, 
and subpedunculate prothorax. 
Dyschromus tiburonicus n. sp. 
Form average ; dull black with a brownish, purplish cast 
especially on the elytra ; mouth parts and appendages 
brownish to piceous. Head about 2/3 width prothorax; 
eyes moderate; front dull but not punctate, with 2 short 
impressions between anterior edges of eyes; vertex lightly 
transversely impressed ; antennae as usual in genus ; mentum 
with short, emarginate tooth ; labial palpi both sexes with 
apical joint very broadly triangular, apex nearly as wide as 
inner side in S ; apical joint maxillary palpi slender, nar- 
rowly truncate. Prothorax about 1/3 wider than long, 
slightly narrowed behind ; sides straight or very broadly 
and slightly sinuate before right or slightly obtuse basal 
angles ; base and apex not margined, side margins narrow, 
each with a seta 1/3 from apex and at basal angle; disk 
rather flat basally, more finely alutaceous than head, not 
punctate ; transverse impressions rather vague ; middle line 
fine but well impressed except at base and apex; basal 
fovese linear, about 1/3 length prothorax, scarcely nearer 
sides than middle. Elytra, convex, opaque; striae entire, 
moderately impressed, impunctate except for a strong punc- 
