j()4 William Morton Wheeler 



ocelli and 11 -jointed antennae. The scapes are long, reaching beyond 

 the posterior corners of the head, the funicular joints subequal, fully 

 3 times as long as broad, the first joint not shorter, but a little more 

 swollen than the succeeding joints, the terminal joint twice as long 

 as the penultimate. Mandibles small, apparently dentate. Thorax 

 elongate elliptical. Petiolar node low and rounded, transversely 

 elliptical, a little broader than long. Genital appendages prominent, 

 slender; stipites long, digitiform. Legs long and slender. The wings 

 overlap oneanother on the back of the specimen and are so trans- 

 parent as to show almost no traces of the venation. Both the discal 

 and cubital cells seem to be absent. The stigma is large and trian- 

 gular. The surface of the body, scapes and legs is shining and finely 

 punctate; the hairs on the body and appendages are rather dense, 

 very short and reclinate. The color of the specimen is dark brown. 



Tribe Oecophyllini Emeey. 



Genus Z>imorphO'}nyr^nex Ern. Andre. 



Dimorphomyr'niex theryt Emery. (Fig. 50.) 



Dimorphomyrmex Theryi Emery, Bull. Soc. Ent. France, 1905, p. 188, Fig. 1. $: 

 Handlirsch Foss. Insekt. 1908, p. 868; Wheeler, Psyche, XVII, 

 1910, p. 132. 

 Worker major and media. Length 6 — 8 mm. 

 Head a little longer than broad, subrectangular, a little narrower 

 in front than behind, with straight sides, rounded posterior corners 

 and feebly concave posterior border, not very convex above, flattened 

 below. Eyes large and convex, elongate elliptical or slightly reniform, 

 scarcely more than ^s ^s long as the head and near the middle of 

 the sides of the latter but not visible when the head is seen from 

 below, slightly more approximated in front than behind. Ocelli pre- 

 sent, at least in the worker major, possibly absent in the smaller 

 mediae. Frontal • carinse short but prominent, extending to the middle 

 of the anterior orbits. Frontal area small and indistinct; frontal 

 groove present but short and shallow. Clypeus flat, broader than 

 long, its posterior border extending back medially between the frontal 

 carinse and with its rounded and entire or very feebly excised anterior 

 border projecting in the form of a short broad lobe. Mandibles stout, 

 broad at their insertions, with evenly convex external and 8 — 9-toothed 

 apical borders, not decussating when closed. The teeth are stout 

 and blunt, the apical longest but shorter teeth alternating with the 

 longer towards the base. Antennae short, 8 -jointed; scapes not rea- 

 ching to the posterior orbits, incrassated at their tips; joints 1 and 2 



