62 Psyche [Sept.-Dee. 
Branch Apedunculata. PL II, fig. 13-15. 
Characters: The petiole rises from the articulation with the 
epinotum in a straight line or in a convex line, i.e., the node 
extends clear to the articulation and the peduncle is not differ- 
entiated; the node is usually strongly margined and sometimes 
the lower face of the petiole in profile is concave. 
Type: P seudomyrma sericea Mayr. 
Groups: subtillissima, sericea , acanthobia , elongata , fili- 
formis , fiebrigi-brunnea. 
Branch Latinoda. PI. II, fig. 17-22. 
Characters: The peduncle is very short and notably broad- 
ened; the node is short and broad, sometimes broader than 
long; it is usually not margined at the sides. 
Type: P seudomyrma latinoda Mayr. 
Groups: triplaridis-maligna , arboris-sanctce, damnosa-lati- 
noda , canescens. 
Key for the Identification of the Workers 
OF PSEUDOMYRMA 4 
Branches of Pseudomyrma 
1. The pedicel is ornamented with spines or cones or carinae 
on the posterior face, or with longitudinal impression or 
suture Ornatinoda , PI. II, fig. 1, 2, 3; PI. Ill, fig. 1 
The petiole is not ornamented 2 
2. Petiole usually very long, club shaped, not marginate or 
submarginate Clavanoda, PL II, fig. 4, 5 
Petiole not distinctly club shaped 3 
3. Petiole from above triangular in outline; marginate or not 
marginate; usually with a peduncle. The species which 
have the petiole triangular but the peduncle very short 
and broad ( canescens , PL II, fig. 18), have been included 
in Latinoda Triangulinoda, Pl. II, fig. 6-13 
Petiole from above not triangular ...A 
4. Petiole from above convex at the sides, usually broadest in 
the posterior third ; sometimes subtriangular, but always 
lacking a differentiated peduncle, i.e., the anterior face 
4 This key can not be used generally for the identification of the females and 
males, although it is often possible to place the former by means of it. No attempt 
was made at completeness, because the main purpose of the key is to indicate 
clearly the position of the newly described forms. 
