. " 220 



Aphaenogast-er (DeromyrmaJ pythia, Forel : ibid., p. 76, 

 two females and male. 



Worker. — Length, 4-5*5 mm. 



Averaging smaller than longiceps. Head scarcely longer 

 than broad, distinctly broader behind than in front, with less- 

 rounded posterior corners than in longiceps, and with less- 

 constricted, though distinctly marginate, posterior border. 

 Eyes distinctly less convex, antennae shorter, though the 

 scapes surpass the occipital border of the head by nearly 

 one-fourth their length ; funicular joints shorter. Pronotum 

 and base of epinotum more convex and rounded above in pro- 

 file • mesoepinotal constriction shorter. Epinotal spines 

 shorter, much further apart at their base than long, and 

 directed more upward. Petiolar node rising less abruptly 

 from the peduncle. Legs shorter and stouter, gaster perhaps 

 a little larger than in longiceps. 



Smoother and more shining; mandibles subopaque and 

 shining ; the rugae between the frontal carinae and eyes 

 feebler ; epinotum smooth and shining above ; sides of meso- 

 no turn and epinotum much more finely rugulose-punctate, so 

 that their surfaces are also more shining. 



Hairs finer and paler and a little more oblique on the 

 legs and antennal scapes. 



Colour usually paler and more yellowish than in 

 longiceps. 



Female. — Length, 9 ' 5 - 1 1 mm.; wings, 12*5-13 mm. 



Smaller than the female of longiceps, with the posterior 

 corners of the head more pronounced and less rounded, the 

 eyes somewhat less convex, the antennae, thorax, and legs 

 shorter, and the epinotal spines smaller and acute. Venation 

 as in longiceps . 



Sculpture much as in longiceps, but the head more sub- 

 opaque and more finely rugose. Gaster and upper-surface of 

 thorax very smooth and shining. 



Pilosity as in the worker. 



Colour distinctly paler than that of the female longiceps, 

 wings less deeply infuscated, 3-ellowish-hyaliiie, with t lie 

 radial vein and apterostigina dark-brown. Mesonotum with 

 three large longitudinal brown blotches, gaster behind the 

 first segment brownish-yellow, as are also the legs, including 

 the coxae. 



Male. — Length, 4-4*5 mm. 



Smaller than the male of longiceps, the head and 

 antennae shorter, the former scarcel}* longer than broad, 

 excluding the eyes ; thorax much shorter and broader, the 



