STRUMIGEXYS. 147 



Myrmica (Cremastogaster) rufa, Jerd. loc. cit. p. 114. 

 Cremastogaster deponens, Walk. A. M. N. H. (3) iv (1859), 



p. 374, 2- 



Cremastogaster pellens, Walk. loc. cit. p. 374, $ 

 Cremastogaster forticula, Walk. loc. cit. p. 375, $ . 

 Cremastogaster brunnescens, Motsch. Bull. Soc. Nat. Mosc. xxxvi 



(1865), p. 20, . 



Cremastogaster apicalis, Motsch. loc. cit. p. 20, $ . 

 t Cremastogaster apicalis, Smith (nee Motsch.), '2nd Yark. Miss. 1878, 



p. 12. 



Genus STRUMIGENYS. 



Strumigenys, Smith, Jour. Ent. i (1860), p. 72. 

 Labidogeovs et Pyramica, Roger, Berl. ent. Zeit. vi (1862), pp. 249 

 & 251, pi. 1, figs. 17, 18. 



Type, S. mandibularis, Smith, from Brazil. 



Ranf/e. Both hemispheres. 



. Head more or less cordate, the anterior portion narrowed, 

 snout-like ; mandibles very long, the shaft more or less cylindrical, 

 linear, slender and porrect, turned inwards at the apex and tri- 

 dentate (in Indian species); clypeus with the portion produced 

 back between the base of the antennae narrow ; antennae 6-jointed, 

 the scape and flagellum folding back into posteriorly divergent 

 grooves, placed above the eyes, these latter situated about the 

 middle of the sides of the head; posterior lateral lobes of the 

 head prominent. Thorax convex anteriorly, not so broad as the 

 posterior portion of the head ; seen in profile it is slightly and 

 widely emarginate at the mesonotum ; thoracic sutures visible 

 but not deeply impressed, the thorax slightly compressed pos- 

 teriorly ; the basal portion of the metanotum longer than broad, 

 ending (in the Indian species) in two spines or teeth ; legs 

 moderately long, rather slender, tibial calcaria absent on the 

 intermediate and posterior legs. Pedicel: the nodes subovate, 

 rounded above, with an elongate petiole to the 1st node in front ; 

 2nd node a little broader than the 1st ; abdomen broadly oval, 

 anteriorly slightly truncate. 



$ . Similar to the , with the thorax, however, more massive, 

 the vertex of the head bears three ocelli and the eyes are larger ; 

 the pronotum is depressed and forms no part of the dorsum ; the 

 mesonotum and scutellum are large and somewhat flat, the latter 

 gibbous ; the metanotura is depressed, the metanotal spines shorter 

 and the nodes of the pedicel slightly larger than in the . Wings 

 narrow, with a medial and a radial but no cubital or discoidal cell. 



Key to the Species. 



a. Shafts of mandibles thickened in middle .... S. lyroessa, p. 148. 



b. Shafts of mandibles not thickened in middle. 

 a'. Pronotum punctiu-ed, opaque. 



3 . Shafts of mandibles parallel. 



a 3 . The innermost of the three inandibular 



teeth the smallest S.fece, p. 148. 



L2 



