r.s 



bulletin: museum »>i comparative zoology. 



differently formed. In Arctomynnex the penultimate antenna! joint 

 is smaller proportionally even than in Adelomyrmex and the club has 

 the appearance of being one-jointed. 

 Genotype, - Adelomyrmex (Ardomyrmex) hirrutiis, sp. noV. 



42. Adelomyrmex (Arctomtrmex) birsutus, sp. nov. Fig. 21. 



Worker. Length L75 nun. 



Bead a little Longer than broad, Bides nearly Btraight, posterior cornera 



broadly rounded, occipital border shallowly and narrowly concave at middle. 

 Basal edge of mandibles with a triangular tooth a little in front of middle, 

 blades with four small, separated teeth. Anterior border of clypeilfl bluntly 



Fig. 21. — Adelomyrmex (Arctomyrmex) hirsutus Mann. Worker, a. Front view of head. 



6. Lateral view of thorax and petiole. 



-1-dentate. Antennal scapes extending less than two thirds the distance to 

 occipital corners; hist funicular joint Longer than the three succeeding joints 

 together, remaining joints, except the terminal strongly transverse, terminal 

 joint very large, as long as the seven preceding joints together. Eyes flat, 

 situated in fronl of middle of sides of head. Thorax moderately convex in 

 profile. Mesoepinotal suture strongly impressed at sides, feebly at middle. 

 Epinotum flat, roundly margined at sides and armed with a pair of short, 

 triangular spines; inferior angles produced and rounded. Petiole very shortly 

 pedunculate; node from above transversely oval, less than twice as broad as 



