1931 ] 
Ants of the Genus Macromischa 
181 
of thorax different. Pilosity more abundant, hairs shorter 
and stiffer. Coloration different. Gaster and post-petiole 
less shining. 
Agrees with M. aguayoi var. archeri Wheeler in the 
punctation of the head and shape of the post-petiole, but 
differs by the shape of the petiole, sculpture of the thorax, 
pilosity and color. 
Santschi recently described (1931), another species of 
this group: M. bierigi , which comes from “Vinales” the 
type locality for archeri, but the description of bierigi 
agrees so much with the cotypes of archeri that I have ex- 
amined, that if not the same it is only a variety of M. 
aguayoi very close to archeri. 
Macromischa wheeleri petri subsp. nov. 
Worker. Length 4.5 mm. 
Head longer than broad, sides slightly convex, posterior 
corners rounded. Eyes situated at the middle of the sides 
of the head. Mandibles with 5 teeth. Frontal carinae 
short and slightly divergent behind. Antennae slender, 
scapes surpassing the occipital corners, first funicular joint 
slightly longer than broad, club 3- jointed, terminal joint a 
little shorter than the two preceding together. Clypeus 
rounded, anterior border concave. 
Thorax about 2*4 times as long as broad, epinotum armed 
with a pair of short blunt divergent spine-like tubercles, 
which are much shorter than their distance at base. 
Peduncle of petiole curved, as long as node, with a small 
blunt tooth beneath in front. Node in profile as long as 
high, convexly rounded above. Post-petiole campanulate, 
about as long as broad. Femora incrassated, tibiae some- 
what so. 
Body and appendages very shining. Head with sparse 
piligerous punctures. 
Mandibles and cheeks triated, scapes finely so. Thorax 
and epinotum coarsely rugose. Rugae sinuous on pronotum, 
transverse on meso- and epinotum. Petiole longitudinally 
rugose at sides. 
