STIGMATOMMA. 



3: 



posterior face ; abdomen narrow, not wider than the tliorax, tlie 

 constriction between the basal two segments deep, giving the basal 

 segment a nodiform appearance ; sting exserted. 



This genus is closely allied to Anibh/opone, Erichs., but differs 

 chiefly in the shape and armature of the mandibles. Next to 

 nothing is known of the habits of the species, of which three are 

 found within our limits. The nest is subterranean, and the 5 and 

 c? are winged. 



Keif ^^ ^^''^ SiHcies. 



a. Eyes compai'ati\ely large ; flagellum of aii- 



tennfe long, nearly half as long again as man- 

 dibles ." \ S. rothneyi, p. 37. 



b. Eyes smaller ; flagellum of autenuge shorter, about 



equal in length to mandibles. 



a'. Posterior lateral angles of head prominent. 



Length under 7 mm S.fece, p. 38. 



b'. Posterior lateral angles of head not pro- 

 minent. Length over 7 mm. S. belli, p. 38. 



41. Stigmatomma rothneyi, i-«;Y/(Ambl\opone), Jour. Bomb. X. H. 

 Soc. xiii (1900), pp. 55 & 56, . 



^ . Black, the mandibles, the antenune and antennal carinae, the 

 legs, and, obscurely, the apices of the abdominal segments, ferru- 

 ginons. Head, thorax and abdomen finely and densely punctured, 

 covered with short erect pale hairs, somewhat more dense and 

 longer on the femora and tibife of the legs ; head and thorax opaque, 

 abdomen slightly shining. Head moderately convex above and on 

 the sides, almost as broad posteriorly as in front, the posterior 



2l). — Sfif/viat omnia rothnci/i 



lateral angles i*ounded ; mandibles obliquely striate, the apex 

 smooth and polished, anterior margin of clypeus transverse, not 

 denticulate ; antennal carina^ short, wide apart ; joints of the 

 flagellum of the antennae rounded, distinct. Thorax : the prouotum 

 long, convex above ; the mesonotum depressed ; the metanotum 

 about as long as the pronotum, rounded above and broadening 



