112 



William Mortor Whefxer 



tending back to the middle of the anterior orbits. Frontal area large, 

 triangular, indistinct. Frontal groove distinct but not extending to 

 the anterior ocellus. Mandibles small, convex, triangular, with 5 

 short, blunt, subequal teeth. Antennae very short, 10-jointed, funiculi 

 enlarged towards their tips but without a differentiated club. Palpi 

 very short, the maxillary pair apparently 6-jointed. Thorax only 

 about as long as the head including the mandibles, but narrower; 

 prothorax much larger than the mesothorax and epinotum ; metanotum 

 well-developed, but very narrow; mesoepinotal constriction distinct. 

 Petiole with a blunt, low, transverse node. Gaster large. Legs short ; 

 middle and hind tibise with very short, simple spurs; claws simple, 

 well-developed. 



Prodimorphomyrmex primigeniuSf sp nov. 

 Worker (Fig. 54). Length about 8 mm. 



Antennal scapes short, slightly incrassated at their tips, which 

 do not reach to the posterior orbits; first funicular joint twice as 

 long as broad, second joint small, about as broad as long, joints 3 and 



4 broader but not longer 

 than the second, joints 7 — 8 

 nearly as broad as long, ter- 

 minal shorter than the two 

 penultimate joints together. 

 Pronotum as long as broad, 

 with rounded, sloping hu- 

 meri, twice as broad as the 

 mesonotum, both together 

 feebly and evenly convex in 

 profile ; mesonotum seen 

 from above longer than 

 broad, broader in the front 

 than behind, marked off 

 from the small metanotum 

 by a distinct suture, with 

 compressed sides. Epinotum 

 about as broad as long, 

 broader behind than in front, 

 rounded in profile, without a distinct base and declivity. Petiole 

 small, a little broader than long, its node low, compressed antero- 

 posteriorly, slightly inclined forward, its anterior and posterior surfaces 

 rather flat, its border rather blunt and entire. 



Fig. 54. 



Prodimorphomyrmex primigenuis sp. uov. 

 Worker, 57. 



