J982] 
Buschinger — Leptothorax faberi 
199 
Fig. 1. Head in front view, and head, thorax, and petioles in lateral view of females 
of Leptothorax. a,b, L. faberi n. sp.; c,d, its host species, “L. muscorum ”, large black 
form; e, f, “L. muscorum", small brown form, for comparison. 
Postpetiole (fig. lb) from above about 1.4 times broader than the 
petiole, kidney-shaped with a slight anterior concavity. In lateral 
view, the anterior face is slightly convex, nearly perpendicular. 
Summit rounded, posterior face slightly concave, descending to- 
wards the gaster. 
The seemingly distinct ventral spine is formed by a sickle-shaped, 
transverse protuberance with a sharp anterior edge. 
Head, thorax, petiole, and postpetiole mostly coarse and rugu- 
lose, gaster smooth and shining. Body sparsely covered with erect, 
short and stiff hairs; legs and antennal scapes with abundant, 
appressed hairs; funiculus with dense, suberect hairs. Maximal 
length of hairs in head, thorax and gaster 0.06-0.08 mm. 
Coloration: yellowish-brown with head, dorsal parts of thorax, 
petiole, postpetiole and gaster somewhat darker brown. Legs uni- 
formly brown, antennae brown with a blackish-brown club. 
