1958] 
Brown — Strumigenys 
87 
mm. ; Cl 73, Ml 34. Maximum width across clypeus 0.27 
mm. 
Similar to S. guttulata, but the head narrower behind, 
with narrower occipital lobes. Mandibles stout and short, 
like those of guttulata , but the inner borders convex and 
bearing narrower convex, translucent lamellae that do not 
quite meet at full closure. Preapical tooth large, flattened, 
distinctly recurved, translucent in texture, much as in the 
lamella. Dorsal apical tooth straight, slender and quite acute, 
but only about 0.05-0.06 mm. long; ventral tooth stout, 
divergent, a little shorter than the dorsal tooth; 2 (possibly 
3) intercalary denticles present. Antennal scrobes distinct, 
broad and deep, their dorsal borders distinctly produced 
laterally as slightly raised, anteriorly convex, thin but opaque 
lamellar borders. Center of head in region of vertex evenly 
convex; occipital lobes very feebly depressed. Posterior 
excision very broad, deep and semicircular, except that a 
broad, almost straight-edged translucent lamella fills its 
bottom, so that the excision appears broad and truncate in 
outline from dorsal view. Clypeus triangular, distinctly 
broader than long; posterior angle extended acutely, but 
narrowly rounded at the tip; anterior border very nearly 
straight, only very feebly depressed and concave medially. 
Eyes are small and situated at about the midlength of the 
head. Preocular laminae approximately straight and only 
feebly converging anteriorly. 
Alitrunk rather narrow seen from above, only slightly 
wider across pronotum than through propodeum ; anterior 
pronotal border narrowly rounded, with a projecting cul- 
trate lamellar margin overhanging a deep transverse ex- 
cavation in the dorsum of the cervix; anterodorsal margin 
of latter produced as a flange. Promesonotum in profile 
moderately convex; posterior mesonotum gently concave; 
metanotal groove obsolete ; propodeal dorsum feebly convex. 
Propodeal teeth long, fine and spiniform, wholly enveloped 
in the thick, white opaque infradental lamellae, which are 
spongiform, broad but with irregular, feathery concave 
borders terminating in a higher ventral point. Since only 
the holotype is available, the feathery spongiform lamellar 
structure may possibty be an artifact, but there is nothing 
