
724 THE AMERICAN NATURALIST. [VoL. XXXVI. 
ADDENDA. 
Since the manuscript of the preceding paper was received, 
Professor Emery has made some changes in the subdivision of 
the genus Cerapachys. He now divides this genus into five sub- 
genera as follows : (1) Cerapachys (sensu stricto), with 12-jointed 
antennz ; (2) Parasyscia, with 11-jointed antenne; (3) Odcerza, 
with 10-jointed antennz; (4) Syscia, with 9-jointed antenna 
and the basal segment of the gaster but little longer than the 
postpetiole; (5) Cysias, with 9-jointed antennz and the basal 
gastric segment very large. The more homogeneous genus 
Phyracaces is not cut up into subgenera. 
In another recent paper? Emery describes a new genus, 
JEnictogiton, based on a male specimen of a peculiar doryline 
ant from the Congo (A. forsiceps Emery). As the name indi- 
cates, this insect is allied to /Enictus. 
As a further addition, I may mention that Forel? has very 
recently described a remarkable new genus of Ponerinz from 
Haiti under the name Emeryella. It resembles the extraor- 
dinary genus Mystrium in the structure of its mandibles.. In 
other respects it is allied to Ectatomma. The following is a 
translation of Forel's diagnosis : 
* Emeryella gen. nov. 
* Mandibles, at first sight, very similar to those of the genus Mystrium, 
but without the two rows of teeth along their inner borders. They are 
linear, slightly depressed, longer than the head, feebly curved inwards, 
especially at their distal half, the basal half being nearly straight. Their 
bases are a little longer than their tips, which are obliquely truncated. 
There are only three teeth on the mesial border; the first is very broad, 
short, and obtuse, and not far from the base; the second, situated in the 
middle, is short and obtuse ; the third is still smaller, and near the tip. The 
mandibles are nowhere canaliculated. They are inserted, like those of 
Mystrium, on the widely separated anterior angles of the head, so that they 
enclose a large empty space. 
1 Note mirmecologiche, Rendiconto delle Sess. della R. Accad. delle Scienze dell’ 
Istituio di Bologna (Nov. 17, 1901), pp. 3-15. 
? Note sulle Doriline, Bull. della Soc. Ent. Ital, anno xxxii, trim. 1 (1901) 
PP 43-03, 
et da # , 1 

o1 
Ann. Soc. Ent. Belg. , tome xlv (1901), pp- 334-382- 

