82 
Psyche 
[March 
(1971, J. Entomol. (B) 40: 118-119, figs. 1, 2, worker, queen) 
described P. boltoni from Ghana; this species appears to be a fourth 
member of the stictum group, perhaps annectant to the pergandei 
group. 
Borgmeier (1959, An. Acad. Brasil. Ci., 31: 309, worker) de- 
scribed P. brasiliense , a close relative of the Central American- 
Mexican P. micrommatum , from southeastern Brasil ; it is the first 
representative of the genus from so far south in the New World. 
I have found a lone Proceratium queen in rotten wood in wet 
forest on the lower slopes of Mt. Klabat in northeastern Celebes. 
The specimen is in the silciceum group and is fairly near P. carini- 
frons and P . lombokense. 
Roy Snelling has published a paper (1967, Contrib. Sci. Los An- 
geles County Mus., 124: 1-10.) giving further data on P. calif orni- 
cum of the West Coast of the United States, plus a key to the New 
World Proceratimn species. The species of the micrommatum group 
are, however, very close to one another, and I suspect that P . con- 
vexiceps may eventually be shown to be synonymous with P. microm- 
matum , because the chief character — presence or absence of a tri- 
angular median lobe or tooth on the clypeus — involves this small 
tooth that is very variable in size in the samples from Panama and 
Mexico. P. micrommatum seems to be widespread in Mexico : Chi- 
chicastle, Tabasco (F. Bonet) ; Pueblo Nuevo, Veracruz (E. O. 
Wilson) ; Mesa de Chipinque, near Monterrey, Nuevo Leon (S. and 
J. Peck) ; Antiguo Morelos, Tamaulipas, litter of palm- thorn forest 
(S. and J. Peck) . 
P. normandi Santschi (1929, Bull. Soc. Ent. Belg., 69: 138, 
worker, queen; type locality La Caille, Algeria and Ain Draham, 
Tunisia) is a new synonym of P. numidicum Santschi (1912, Bull. 
Soc. Hist. Nat. Afr. Nord, 4: 1 72-1 73, figs. 1, 2, worker, queen; 
type locality Ain Draham, Tunisia). In the Santschi Collection, 
Naturhistorisches Museum, Basel, the types of P. numidicum are 
callow in part, but I could find no other differences between them 
and the types of P. normandi in the same collection. 
Proceratium mancum Mann (1922, Proc. U. S. Nat. Mus., 61 
(13): 6-7, worker, queen; type locality: Cecilia, Honduras) is a 
new synonym of P. silaceum Roger (1863, Berlin. Entomol. 
Zeitschr., 7: 172, worker; type locality “Nord-America”) . The 
differences cited by Mann and listed in Snelling’s key are all very 
variable in P. silaceum , as is body size. Specimens from the tropical 
part of the range usually have the petiolar node thinner from front 
