72 
Psyche 
[June 
This is the first known West Indian Schizogenius. It is 
close to S. tristriatus Putz. of Mexico and Central America 
(several specimens examined) but is smaller and more con- 
vex than typical tristriatus (described as 5 mm. long) and 
much smaller than variety longipennis Putz. (described as 
larger than tristriatus). Bates, in “Biologia,” gives the 
size of his specimens of tristriatus as from IV 2 to 2% lines, 
which would include specimens as small as the Cuban ones. 
However, the identity of the various Central American 
forms referred to tristriatus seems to me very questionable, 
and since the Cuban form, if it really is tristriatus at all, is 
fairly constant and smaller than either of the described con- 
tinental forms, it seems best to treat it as a distinct species 
at least temporarily. It can hardly prove to be less than 
a good subspecies. In Leconte’s table of North American 
Schizogenius (Bull. Brooklyn Ent. Soc. 2, 1879, p. 34) 
arimao runs to lineolatus or sallei, but is smaller and more 
convex than either. 
Key to West Indian Bembidiini 
The following key will help to define the numerous new 
species of Bembidiini which are described in the following 
pages. It includes all previously known West Indian species 
except Tachys picturatus Putz. (possibly a member of the 
vittiger group) and T. piceolus Laf. (possibly near corrus- 
cus), which I have not been able to identify in the material 
I have seen. It also excludes the completely blind Petro- 
charis eggersi Ehlers of St. Thomas, which I do not know. 
1. Outer apical angle of front tibia normal, rounded; size 
2%-6 mm (Bembidion) 2 
Outer apical angle of front tibia obliquely truncate or 
truncato-emarginate ; size 3 mm. or (usually) less 6 
2. Dorsal elytral punctures practically on third stria ; color 
plain dark rufous; length 4 mm. 
Bembidion jamaicense n. sp. 
Dorsal elytral punctures near middle of third interval ; 
elytra more or less variegated 3 
