74 
Psyche 
[June 
11. Posterior dorsal puncture of elytron (on outer edge of 
third interval, as a rule) much in front of apical re- 
curved stria; body very convex 12 
Posterior dorsal puncture of elytron on or within hooked 
tip of apical recurved stria; body usually more de- 
pressed 13 
12. Elytra each with five coarsely punctate striae or rows of 
punctures; mentum bi-perf orate 
Tachys (subgenus?) immaculatus (Bates). 
Elytra each with only one or two striae, which are im- 
punctate ; mentum not perforated 
Tachys (Tachyura) xanthopus Dej. 
13. Posterior elytral puncture directly upon hooked tip of 
apical recurved stria; surface not iridescent 14 
Posterior elytral puncture within, not on, hooked tip of 
apical recurved stria; surface usually more or less iri- 
descent 15 
14. Basal angles of prothorax obtuse 
Tachys bradycellinus , Hayw. 
Basal angles of prothorax right.. Tachys occultator Casey 
(and) Tachys ensenadae Mutchler. 
15. Male with two joints of front tarsus dilated 16 
Male with only basal joint of front tarsus dilated 20 
16. Antennae very slender (middle joints about three times 
as long as wide ; tip of sixth reaching about to basal an- 
gle of prothorax) ; eyes moderate ; length +3 mm. 
Tachys albipes Lee. 
Antennae stouter and shorter; other characters vari- 
able 17 
17. Eyes abruptly prominent, forming right angles with 
sides of head behind them; basal angles of prothorax 
obtuse but distinct; length just over 21/2 mm- 
Tachys abruptus n. sp. 
Eyes less prominent, forming obtuse angles with sides 
of head behind them; other characters variable 18 
