The Ants of the Baltic Amber. 



105 



of the funiculi subequal, about twice as long as broad, joints 3 and 4 



about IV2 times as long as broad, 5 and 6 scarcely longer than broad, 



the terminal joint nearly equalling the two penultimate joints together. 



Palpi short, those of the maxilla- 6 -jointed, those of the labium 



4 -jointed. Thorax long, narrower than the head, constricted in the 



mesoepinotal region; pronotum as long as broad, with rounded, sloping 



humeri, feebly convex above. Mesonotum from above subrectangular, 



somewhat longer than broad and broader in front than behind; in 



profile its surface is straight and 



gradually sloping backward, its sides 



compressed. Metanotum distinct, 



short and transverse, marked off from 



the mesonotum by an impressed line 



or possibly, in the largest specimens 



by a distinct suture. Epinotum 



with subequal base and declivity, 



the former feebly convex, the latter 



slightly concave, meeting at a blunt 



obtuse angle. Petiole short, vrith a 



low, blunt and rounded node, which 



is somewhat compressed anteropos- 



teriorly and about l^/g times as broad 



as long. Gaster large, elongate oval, 



with 5 visible segments and a strongly 



developed circlet of anal cilia. Legs 



long and rather stout, middle and 



hind tibiae with short, nonpectinated 



spurs. 



Body rather shining, head and 

 gaster very finely, thorax more coar- 

 sely and reticulately shagreened or 

 coriaceous. Mandibles, clypeus at 

 least on the sides, cheeks and front between the eyes and 

 about half way to the posterior border of the head, sharply 

 and densely longitudinally striated; the mandibles also coarsely 

 punctate. 



Erect hairs absent or almost absent on all parts of the body 

 except the posterior gastric segments where they are long and sparse. 

 Funiculi with shorter, more numerous, appressed hairs. 



Color of well preserved specimens red or black. 



Worker minor. Length 5 — 5,5 mm. 



P"ig. 50. Dimorphomyrmex theryi Emery. 

 a) Worker, K 4252 ; b) head of worker. 



