480 bulletin: museum of comparative zoology. 



210. Camponotus {Myrmohrachys) adpressisetosus Forel. 



Plate 6, fig. 48. 



Worker major. (Plate 6, fig. 48). Length 9 mm. 



Head, excluding mandibles, longer than broad, with narrowly 

 rounded occipital corners and concave border; sides nearly straight 

 and subparallel for half their distance from occiput to anterior border, 

 then convex and convergent. Clypeus longer than broad, strongly 

 keeled at middle, the sides straight and parallel; anterior border 

 broadly concave at middle. Frontal area distinct, elongate, triangu- 

 lar. Frontal carinae extending to nearly opposite the posterior borders 

 of eyes. Eyes small, very flat, located in front of sides behind the 

 middle. Mandibles 4-dentate. Antennae short, slender, the scapes 

 curved, extending three fourths the distance to occipital angles, funi- 

 cular joints cylindrical, joints 2-10 subequal. Pronotum transverse, 

 sides evenly rounded, surface slightly convex. Mesonotum flat above, 

 a little broader than long, evenly rounded at sides. Mesoepinotal 

 suture faintly impressed. Epinotum from above three times as long 

 as broad; evenly rounded above and at sides, without distinct base 

 and declivity. Petiolar node twice as high as thick, rounded in front, 

 nearly straight behind, above narrowly rounded. Gaster short and 

 stout, oval. Legs long, tibiae moderately depressed. 



Subopaque, very finely shagreened throughout, with a covering of 

 tine silky pubescence, which is a little more abundant on the gaster 

 and thorax than on the head. The head bears short, stiff suberect 

 hairs, in addition to much longer erect hairs. The latter are present 

 also on the thorax and gaster, where they form a long brush on the 

 epinotum and the apex of node. Antennae without pubescence or 

 pile. Mandibles subshining, finely punctate, with sparse, short hairs. 

 Legs with sparse, fine recumbent hairs; without erect hairs. 



Color black; antennae and mandibles brown, recumbent pile and 

 pubescence golden. 



Worker minor. Length 7 mm. 



Head, excluding mandibles, longer than broad, narrowed in front, 

 with slightly convex sides, broadly rounded posterior corners and 

 straight occipital border. Clypeus as broad as long, strongly keeled 

 at middle. Mandibles 7-dentate. Antennal scapes extending half 

 their length past the occipital corners. Eyes large, moderately convex, 

 located at posterior third of head. Thorax much as in major worker, 

 but the mesoepinotal suture less impressed. Rest as in worker major. 



