314 Bulletin American Museum of Natural History. [Vol. XXII , 



17. Stenamma owstoni sp. no v. 



Worker. Length 3.25-3.5 mm. 



Head, excluding the mandibles longer than broad, sides rather straight, 

 subparallel, posterior corners rounded. Clypeus short, depressed, its anterior 

 border emarginate in the middle, behind fused with the deeply impressed frontal 

 area. Frontal carinas short, but prominent. Eyes moderate, with 7-8 omma- 

 tidia in the longitudinal diameter. Antennal scapes reaching to the posterior 

 corners of the head. Funiculus with a 4-jointed club, first joint twice as long 

 as broad, joints 2-4 nearly as long as broad, 5-7 as long as broad, joints 8-10 

 slightly longer than broad, terminal joint as long as the two preceding joints 

 together. Thorax with the pro- and mesonotum rather convex, higher than 

 the epinotum and separated from it by a pronounced constriction. Basal 

 epinotal surface in profile straight, longer than the concave declivity; spines 

 small, a little longer than their distance apart at the base, directed upward and 

 backward. Petiole narrow, 3^ times as long as broad, seen from above gradually 

 widening posteriorh^ in profile unarmed below, with a very low, rounded node 

 above. Postpetiole ij times as broad as the petiole, nearly twice as long as 

 broad, regularly elliptical from above, in profile Avith a low, regularly rounded 

 node and a slightly concave ventral surface. 



Mandibles subopaque, rather coarsely striatopunctate, clypeus and frontal 

 area smooth and shining, head and thorax subopaque, the former rather finely, 

 the latter more coarsely, longitudinally reticulate-rugose. Epinotal declivity 

 smooth and shining. Petiole punctate-rugulose, opaque, except the upper 

 surface of the node which is smooth and somewhat shining. Postpetiole and 

 gaster smooth and shining, the former more opaque and, rugose on the sides 

 and below. Legs and antenna subopaque. 



Body and appendages covered with abtmdant, suberect whitish hairs, which 

 are longest on the gaster. 



Reddish brown; head and first gastric segment blackish. Mandibles, clypeus, 

 antennae and legs, posterior border of first gastric segment and all the remaining 

 ■segments yellowish. 



Described from three specimens collected by Mr. Hans Sauter, at 

 Yamanaka, Suruga, at an altitude of 2000 ft. "in rotten wood. " The 

 three specimens appear to have been taken from as many different 

 colonies. 



This species is closely related to the European 5. westivoodi Westw. 

 and the North American brcvicorjie Mayr. From the former it differs 

 in having much larger eyes, longer joints in the base of the antennal 

 funiculus, a lower, less angular and smoother petiolar node, a longer 

 postpetiole and longer and more abundant hairs. From the North 

 American species it differs in these same characters, except that the 

 eyes are of about the same size and the sculpture distinctly 

 finer. 



