PHIDOLOGITON. 163 



the masticatory margin with two strong teeth at apex, and deep, 

 short, longitudinal grooviugs on the upper side ; clypeus narrow in 

 the middle, slightly convex and produced between the base of the 

 antennae, its posterior margin clearly denned and rounded, its 

 anterior margin transverse ; antennal carinae short, divergent ; 

 anteunse slender, pubescent ; eyes small, round, placed about the 

 middle of the sides of the head. Thorax : pro- and mesonotuin 

 convex, the pro-mesonotal suture lightly impressed, the scutellum 

 gibbous and prominent ; the metanotura depressed, the basal 

 portion level, slightly concave, the metanotal spines erect, mode- 

 rately long and stout; legs slender. Pedicel rather short ; the 1st 

 node thick in profile, subtriangular, its upper margin transverse 

 and emarginate, beneath furnished with a stout broad keel ; 2nd 

 node from above transverse, its upper margin rounded, twice as 

 broad as the 1st node ; abdomen broadly oval. 



If. min. Resembles the I/ max. ; very much smaller, the head 

 not bilobed, the posterior emargination barely indicated, the 

 scutellum not prominent, the 1st node of the pedicel not emarginate 

 above, the sculpture of the head and thorax much feebler, no striae 

 on the head posteriorly or on the pronotum. 



Between the above two are intermediate forms, varying in size 

 and a little in sculpture. 



. More or less dark chestnut-brown, the thorax and abdomen 

 often lighter in colour than the head ; the mandibles, antennae 

 and legs yellowish brown ; the head, thorax and abdomen smooth, 

 polished and shining; the sides of the thorax posteriorly, and 

 sometimes the basal portion of rnetanotum above, obsoletely 

 rugulose. 



$ . Resembles the I/ max., but darker, the antennas and legs 

 dark chestnut-brown. Head as in the I/ max., but entirely 

 longitudinally striate, except a patch on either side of the large 

 and conspicuous ocelli, which is punctured but shining ; the head 

 is not so deeply bilobed, and the mandibles more closely and 

 coarsely punctured. Thorax smooth, shining, short, high and 

 massive, almost as high as long ; the pronotum depressed and 

 vertical, the mesonotum slightly convex ; the metanotum short, 

 nearly vertical, slightly concave, transversely striate and opaque ; 

 the metanotal spines short and thick, directed backwards. Pedicel 

 short and broad ; the 1st node as in the I/ max., but opaque, 

 broader above, more broadly emarginate, the appendix beneath 

 forming a thick keel ; the 2nd node shining, transverse and broad, 

 the short posterior portion joining it to the abdomen thick ; 

 abdomen longer, broader and more massive than in the I/ max. 

 Wings dark yellowish brown, subhyaline ; the nervures brown. 



<S . Dark brown ; the antennae and legs pale reddish brown ; 

 mandibles, clypeus and lower anterior portion of head chestnut- 

 brown. Head above finely longitudinally striate ; thorax closely, 

 finely punctured above, slightly shining ; basal portion of meta- 

 notum longitudinally, apical portion transversely striate ; abdomen 

 smooth, slightly shining, with some irregularly-scattered piligerous 

 tubercles. Pilosity tolerablv dense, especially at the base of the 



M2 



