1965] 
Taylor — Genus Codiomyrmex 
227 
Figs. 1-2. Codiomyrmex tetragnathus n. sp. ; holotype worker: Fig. 1. Head, 
mesosoma, petiole and postpetiole in lateral view. Fig. 2. Head in frontal 
view. 
Mandibles each with several hairs ventrally; distal edge of labrum 
with a row of fine looped hairs, forming a thin tangle in its median 
cleft. Body hairs few, elongate, 0.1-0.24 mm long, arranged in erect 
bilateral pairs; completely lacking on head. Mesosoma, petiole and 
postpetiole with 2, 1, and 4 pairs respectively, distributed as in 
Figure 1. Petiolar and postpetiolar tergites also with a few fine 
reclinate lateral hairs which arch back over their posterolateral fungi- 
form masses. First gastric tergite with three basilateral pairs, and 
1 pair on dorsum near its posterior margin. 
Pubescence reduced, dense on antennae, very scattered on frons, 
extremely scattered on first gastric tergite. Color very dark reddish- 
brown, mandibles, antennae, legs and tip of gaster more yellowish. 
Remarks. C. tetragnathus is easily distinguished from most other 
members of its genus by many characters, including the head shape, 
the peculiar mandibular dentition referred to in the specific name, 
the structure of the propodeal teeth and infradental lamellae, the 
