807 



as in the var. humiUor. The posterior margin of the head is 

 distinctly excavated, the node of the petiole is more pointed 

 than in the type, the epiuotum proportionately smaller and 

 more rounded and somewhat smoother and more shining 

 -above. 



Two workers from the Everard Range. 



9. MONOMORIUM (HOLCOMYRMEX) WHITEI, n. sp. 

 Pis. Ixiv., fig. 2, and Ixvi., fig. 1. 

 Worker ma'jor. — Length, 4-4'5 mm. 



Head very large (1'3 mm. broad), subrectangular, as 

 iDroad as long, nearly as broad behind as in front, with much- 

 rounded posterior corners, straight, subparallel sides, and the 

 posterior margin distinctly and acutely excised in the middle. 

 Mandibles large and very convex, with four large, subequal 

 teeth. Clypeus broad, its anterior border deeply excised in 

 the middle, with two sharp carinae, each prolonged into a 

 strong, acute tooth, which is flanked by a somewhat shorter 

 and blunter lateral tooth. Frontal carina short and promi- 

 nent ; frontal area large, impressed, with a short median 

 cannula behind ; frontal groove distinct nearly as far as the 

 middle of the head. Eyes very large, flat, nearly as long as 

 the cheeks, in front of the median transverse diameter of the 

 head. Antennae slender, 12-joint8d ; scapes curved at the 

 Ijase, slightly thickened at their tips, which extend a little 

 l^eyond the posterior orbits; funiculi without a clava, all the 

 joints longer than broad; joints 7-10 subequal, terminal 

 shorter than the two penultimate joints taken together. 

 Thorax broadest through the pronotum, where it is scarcely 

 more than half as broad as the head. Pronotum very convex, 

 almost conical in profile ; mesonotum straight in profile, 

 sloping backward to the mesoepinotal suture, which is dis- 

 tinctly impressed. Promesonotal suture obsolete. Epinotum 

 about two-thirds as broad as the pronotum, longer than broad, 

 with subparallel sides ; in profile with feebly and evenly con- 

 vex base one and a half times as long as the slightly concave 

 declivity, the two surfaces separated on each side by a distinct 

 but blunt tubercle continued backward as a slight ridge. 

 Petiole pedunculate, from above twice as long as broad through 

 the node, which is rather high and conical, with very similar 

 unterior and posterior surfaces, the former rising rather 

 abruptly from the peduncle. Postpetiole from above somewhat 

 l)roader than the petiole, about one and a half times as long 

 as broad, in profile convex and rounded, but much lower than 

 the petiolar node. Gaster large, broadly and regularly ellip- 

 tical, somewhat flattened dorsoventrally. Legs rather long. 



