180 
Psyche 
[December 
impressed, with a median carinula. Antennae slender, 
scapes extended far beyond the occipital corners, first fu- 
nicular segment as long as the two following together ; all 
the remainder longer than broad; club 13-jointed. 
Thorax about 2.2 times as long as broad, broadest at the 
pronotum. Meso- and epinotum roof-shaped. 
Peduncle of petiole short and stout, shorter than node, 
with a distinct antero-ventral tooth, very convex above, 
evenly concave below. Node broader than petiole, evenly 
curved both in front and behind. Post-petiole slightly 
longer than broad. 
Legs long; femora strongly incrassated. 
Surface of the body entirely shining. Scapes finely stri- 
ated; head densely punctate, except the occipital border 
and corners ; cheeks and mandibles rugose. Thorax rugose ; 
rugae longitudinal on sides, irregularly longitudinal on 
pronotum and mesonotum and transverse on epinotal de- 
clivity. Sides of petiole with radiating rugae. Post-petiole, 
gaster and legs smooth. Hairs white, pointed, erected, 
scattered over the body and appendages. 
Head, thorax and petiole deep metallic green. Head with 
bluish reflections. Post-petiole, gaster and appendages 
black. 
Described from several specimens found on limestone 
cliffs at “Soroa,” Province of Pinar del Rio, Western Cuba. 
(Aguayo, coll. IV 1931). Numerous specimens which I 
refer to this form were taken at “El Mamey,” Cayajabos, 
Pinar del Rio, on limestone cliffs, by P. Bermudez, M. Jaume 
and G. Aguayo. 
Cotypes of this species are in the M. C. Z. and in the 
author’s collection. 
I have named this form for my friend M. Barro, an 
amateur entomologist. 
This species belongs to the group of M. aguayoi to which 
it is very closely related, but it can be separated by the fol- 
lowing characters: thorax broader; pedicel higher, much 
more convex above and more evenly concave below ; petiolar 
node longer than broad and more evenly curved in front; 
head less densely punctate on the posterior half. Sculpture 
