16 



longer than broad, feebly chitinized, the sepals of the calyx 

 more heavily chitinized, extremely short, turned outwards 

 but not reflected. 



Myrmecorhynchus emeryi, Ern. Andre. 



Worker Maxima (fig. 1, a and h). Length, 6-6'5 mm. 



Head convex above, excluding the mandibles a little 

 broader than long, broader behind than in front, with straight 

 posterior border and feebly convex sides. Mandibles one- 

 third as long as the head, with convex outer borders and 

 dorsal surface, their inner borders with 8-9 acute teeth, 

 gradually decreasing in length towards the base. Clypeus 

 convex, strongly carinate, its anterior border produced in the 

 middle as a distinct lobe, narrowly emarginate in the middle 

 and rather deeply sinuate on each side. Its posterior border 

 is straight and transverse in the middle. Frontal carinae 

 terminating behind opposite the middle of the eyes. Antennal 

 scapes curved, narrow and slightly flattened at the base, 

 thickened gradually towards their apices, which scarcely reach 

 to the posterior corners of the head. All the funicular joints 

 longer than broad; first joint equal to the two succeeding 

 joints together; joints 2-5 subequal, 1J times as long as broad ; 

 remaining joints a little longer ; terminal joint fully twice 

 as long as broad, nearly as long as the two preceding joints 

 together. Thorax through the mesonotum a little more than 

 half as broad as the head, broadest through the pronotum, 

 which is as long as broad including the rather long neck, 

 rounded above and higher than the epinotum. Mesonotum 

 transversely elliptical, convex, rounded, and sloping. Epi- 

 notum from above subrectangular, with parallel sides, longer 

 than broad ; in profile higher than long, with distinct and 

 subequal base and declivity, the former horizontal, the latter 

 sloping and feebly concave below. Petiolar scale from above 

 transverse, twice as broad as long, in profile lower than the 

 epinotum, thick, as thick above as below, with straight, 

 flattened anterior and posterior surfaces and rounded 

 summit; its ventral portion convex, laterally compressed. 

 Gaster large, elliptical, convex above, its tip somewhat pointed. 

 Legs rather slender. Shining. Mandibles covered with 

 sparse, coarse punctures. Clypeus, head, and thorax sub- 

 opaque, coarsely shagreened ; sides of head more granular or 

 densely and finely punctate ; the clypeus and anterior por- 

 tions of cheeks longitudinally rugose, the front divergently 

 rugulose. Upper-surface of thorax transversely, the sides 

 of pronotum, the mesopleurae and sides of epinotum vertically 

 rugulose. Petiole and gaster very finely and superficially 

 shagreened, shining, with small, sparse, piligerous punctures. 



