372 bulletin: museum of comparative zoology. 



In the structure of the epinotum it is markedly different from all 

 other species belonging to the subgenus, and the coloration is exceed- 

 ingly characteristic. Type. — M. C. Z. 9,184. 



106. Camponotus (Colobopsis) elysii, sp. nov. 



Soldier. Length 6.5 mm. 



Form rather slender. 



Head a fourth longer than broad, sides subparallel, border slightly convex. 

 Mandibular blades with four teeth apically and two poorly defined ones 

 basally. Clypeus strongly carinate, somewhat narrowed and with an elevated 

 margin at anterior third of sides, anterior border nearly straight; posterior 

 three eighths above depressed portion barely more than twice as broad as long. 

 Antennal scapes nearly, but not quite attaining occipital corners. Frontal 

 area small, about twice as broad as long; frontal carinae slightly sinuous, 

 moderately divergent, extending to a point about opposite middle of eyes. 

 Eyes smaller than is usual in Colobopsis, flat, situated in front of sides, well 

 posterior to middle. Pronotmn and mesonotum moderately convex, each 

 broader than long. Thoracic sutures weakly impressed. Base of epinotum 

 broad and convex; declivity sUghtly concave, the two surfaces broadly round- 

 ing into each other. Petiolar node in profile, twice as high as long, narrowed, 

 submargined dorsally; from above, four times as broad as long. Gaster 

 elongate. Legs stout. 



Shining. Mandibles finely rugulose and with sparse, large punctures. 

 Clypeus and anterior border of cheeks with short, rugose striae; remainder of 

 head and body subtly and very densely seriolately striolate, with scattered 

 distinct, though fine, punctures on front between carinae. 



Pale yeUow-brown, the gaster and a spot on vertex darker. 



Worker. Length 4 mm. 



Head a little longer than broad, evenly rounded behind, cheeks parallel. 

 Clypeus convex, rounded anteriorly, not carinate. Antennal scapes sur- 

 passing occipital corners by a little less than half their length. Front strongly 

 impressed between the carinae. Frontal carinae short, nearly straight, ex- 

 tending to opposite anterior third of eyes. Base of epinotum compressed 

 and narrowly convex above, about four times as long as broad; in profile 

 narrowly rounded between base and declivity. 



Petiolar node cuneiform, with convex anterior and straight posterior sur- 

 faces, dorsal margin acute. 



Sculpture as in soldier, except that the rugae on clypeus and anterior por- 

 tion of cheeks are lacking. 



Color pale reddish br^wn throughout. 



