284 
Psyche 
[September-December 
Odontomachus laticeps 
In my discussion of this variable species in 1976 (p. 154 ff.), I 
found no South American records certainly attributable to it, but 
Dr. D. R. Smith has now called my attention to a small number 
of worker specimens in the U.S. National Museum from Bolivia 
that probably do belong to O. laticeps. These samples come from 
Covendo, Huachi and Cachuela Esperanza, all in Beni Province, 
and all were collected by W. M. Mann. These workers are brown 
in color, with legs usually lighter, and they all have the gastric 
dorsum predominantly finely but distinctly longitudinally striate 
and opaque; the bottoms of the striae are punctulate. The size is 
a little smaller than in Central American laticeps (HL 2.48, HW 
1.67 mm in an average specimen from Huachi, Bolivia), but the 
cephalic index (67) is within the range of Central American laticeps, 
which have Cl 66-73. 
The main difference comes in the shape of the apical spine of the 
petiole: This is lower and thicker in side view in the Bolivian sam- 
ples, but still sharply back-tilted: figure 14 (p. 156) in the 1976 re- 
review shows the slender spine of an average Central American 
specimen. The Bolivian population(s) could represent another sib- 
ling species of the haematodus group restricted to Bolivia (or even 
to the drainage of the Rio Beni), but the close relationship to O. 
laticeps is obvious, and I prefer to assign them to that species until 
we know more about the Bolivian Odontomachus in general. All 
previous records of O. laticeps from South America are based on 
O. biumbonatus or other species. 
Odontomachus mormo 
I described this giant species in the 1976 review (p. 161) from 3 
specimens collected in transandean Ecuador. Now Stewart and 
Jarmila Peck have sent me more specimens, including a partial nest 
series with queen, from the Rio Palenque Research Station, 47 km 
SW of Santo Domingo de los Colorados, Pichincha Prov., Ecua- 
dor. The species remains known only from western Ecuador. 
Odontomachus bradleyi 
This species, also described in 1976 (p. 133) from Dept. Junin in 
central Peru, has now been rediscovered by the Pecks in eastern 
