216 
Psyche 
[Vol. 90 
— Pubescence very sparse, or dense pubescence confined to 
postbasal transverse impression of elytra 20 
19. $ fifth visible abdominal sternum excavated on disc; lobes 
of visible sternum 6 moderately broad. 2.6-3. 2 mm. Cuba, 
Puerto Rico Acanthinus quinquemaculatus (LaFerte) 
— $ fifth visible abdominal sternum simple; lobes of visible ster- 
num 6 narrow. 2. 4-3.0 mm. Hispaniola 
Acanthinus concinnus (LaFerte) 
20(18) Elytra with a dense patch of white pubescence in postbasal 
transverse impression. Dark brown, shiny, otherwise gla- 
brous with erect tactile setae; head triangular, it and prono- 
tum longitudinally strigose. Ca. 2.8 mm. Cuba? 
Acanthinus ebeninus (LaFerte) 
— Elytra without patch of dense pubescence in postbasal 
transverse impression 21 
21. Head and prothorax strongly sculptured 22 
— Whole dorsal surface smooth, shiny, punctures fine and 
indistinct, setae very short, sparse and inconspicuous, only 
erect tactile setae evident 23 
22. Dark brown with quadrate yellowish white mark laterally in 
cuticle of postbasal transverse of elytra; head unusually 
large, it and prothorax with some longitudinal striations. 
2.0-2. 8 mm. Jamaica, Cuba 
Acanthinus angusticollis (LaFerte) 
— Head and prothorax rufescent, elytra rufescent at base, with 
a complete luteous band in postbasal impression, brown 
behind. Head and prothorax rugose-punctate. 2.4-2.8 mm. 
Cuba Acanthinus schwarzi Werner 
23(21) Rufescent, elytra paler with brownish to almost black mark- 
ings, at least in narrow, interrupted bands at basal and apical 
thirds, to dark with postbasal impression and a narrow post- 
median band pale. Prothorax with a strong constriction that 
continues weakly across dorsum. Edge of mesosternal shelf 
visible from above, in front of elytral humeri. Head nar- 
rower than semicircular behind eyes. 2.0-2.9 mm. Cuba . . . 
Acanthinus scitulus (LeConte) 
— Pale rufescent, elytra pale rufescent at base, dark brown on 
humeri and behind postbasal transverse impression. Pro- 
