1969] 
Brown and Kempf — Acanthognathus 
95 
teledectus. The brevicornis fossae on head and alitrunk tend to be 
smaller, shallower and more widely spaced, with interspaces cor- 
respondingly broader, smoother and more shining. 
Male unknown. 
Material examined (in addition to type series — i worker and 3 
queens from Panama Canal Zone) : brasil: State of Rio Grande 
do Sul: Nova Petropolis, September 1959, F. Plaumann leg., 1 
worker (WWK) ; Morro Reuter, December 1964, F. Plaumann 
leg., 1 dealate queen (WWK). State of Para: Utinga Forest 
Tract, near Belem, 9 August 1962, P. F. Darlington leg., dealate 
queen from hollow rotten twig on rain forest floor (MCZ). 
Acanthognathus lentus 
Acanthognathus lentus Mann, 1922:34-35, fig. 16, worker, queen. Type 
loc. : Progreso, Honduras. Syntypes in MCZ, USNM, WWK. 
Worker and queen: Measurements and proportions given in 
Table I, closely overlapping those of A. ocellatus, fossae of dorsum 
of head larger and more crowded, with some rugulae present between 
them even on the posterior half, weakly shining; extreme posterior 
corners of cephalic dorsum smooth and shining. Otherwise very 
similar to A. ocellatus. 
A. lentus probably is only a local sculptural variant of A. ocellatus. 
The scanty material available does not yet wholly bridge the differ- 
ence, but a Trinidad specimen of ocellatus (q.v.) shows a tendency 
to do so. 
Male unknown. 
Mann’s description is sketchy, and there is apparently a confusing 
deletion of several lines coming near the middle of the last printed 
line on his p. 34. His artist’s figure is also not very faithful in por- 
traying mandibular apices and head sculpture. 
Material examined: Only a few workers from the type series, 
collected by Mann in rotten wood (MCZ, USNM). 
Acanthognathus ocellatus 
Acanthognathus ocellatus Mayr, 1887: 579, worker. Type loc.: Brasil, “St. 
Catharina.” — Mann, 1916: 452, pi. 5, “fig. 38” ( recte 39), queen, from 
Belem, Para, Brasil. — M. R. Smith, 1944: 150, in key. Type worker 
currently in Museo Civico di Storia Naturale, Genoa, Italy, but pro- 
perly belongs in Naturhistorisches Museum, Vienna, Austria; not seen 
by authors (discussed below). 
Worker: If there is an “average” or “typical” member of the 
genus, this is it. Head more convex dorsally than in A. rudis; 
posterior excision in full-face view evenly semicircular (rather than 
