A SUPPLEMENT TO THE WORLD REVISION OF 
ODONTOMACHUS (HYMENOPTERA: FORMICIDAE) 1 
By William L. Brown, Jr. 
Department of Entomology 
Cornell University 
Ithaca, New York 14853 
In a recent publication (Brown, 1976, Studia Entomologica 19: 
67-171) I reviewed the world fauna of the ponerine ant genus 
Odontomachus. While that contribution was in press, and since 
its appearance, some significant new Odontomachus material, and 
information about material, has come to my notice. It seems ap- 
propriate to supplement the revision now, while it is fresh, by of- 
fering the new information for incorporation. 
The first and most important addition is the description of a new 
(twentieth) species in the haematodus group. 
Odontomachus scalptus new species 
Holotype, worker: TL 10.0, HL 2.66, HW (across vertex) 1.79, 
ML 1.40, scape L 2.52, eye L 0.42, WL 3.08 mm; Cl 67, MI 53, 
SI 141. 
Measurements for the 4 paratype workers range upward to the 
largest specimen, the antenna-less example from Oronoque R., 
Guyana: TL 11.0, HL 2.87, HW 2.05, ML 1.45, eye L 0.47, WL 
3.40 mm; Cl 71, MI 51. 
Closely resembling continental samples of O. bauri, but differing 
sharply in sculpture of mesonotum and gaster: 
(1) Mesonotum and metanotum longitudinally striate, the striae 
tending slightly to diverge cephalad on mesonotum. In outline 
from side view, the mesonotum is a little more strongly convex 
than in bauri. 
(2) First 3 gastric terga finely but very distinctly striate-punctu- 
late, the punctulae in single longitudinal rows (striae) separating 
the very fine ridges (costulae). The punctulae tend to be more 
*A Report of Research from the Cornell University Agricultural Experiment 
Station, New York State College of Agriculture and Life Sciences. The research 
was supported by National Science Foundation Grant GB-31662. 
Manuscript received by the editor February 27, 1978. 
281 
