STUUMIGEXrS. 147 



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

 Cremastog-aster depoueiis, Walk. A. M. N. H. (3) iv (1859), 



p. 374, 2 . 

 Cremastogaster pellens, Walk. he. cit. p. 374, 2 . 

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

 Cremastocraster brimnesceiis, Motsch. Ball. Soc. Nat. Mosc. xxxvi 



(1865),''p. 20, ^ . 

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

 Cremastogaster apicalis. Smith {nee MotscJi.), 'Ind Yark. Miss. 1878, 



p. 12. 



Genus STRUMIGENYS. 



Strmnigenys, Smith, Jour. Eat. i (1860), p. 72. 



Labidogenvs et Pyramica, Roger, Berl. eat. Zeit. vi (1862), pp. 249 

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



Type, S. mandifmlaris. Smith, from Brazil. 



BcDu/e. Both hemispheres. 



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

 snout-hke ; 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 anteunoe narrow ; antennae G-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 emargiuate 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, \\ith an elongate petiole to the 1st node in front ; 

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

 anteriorly sliglitly truncate. 



2 . Similar to the ^ . with the thorax, however, more massive, 

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

 the pronotuni is depressed and forms no ])art of the dorsum ; the 

 mesonotum and scutellum are large and somewhat flat, the latter 

 gibbous ; the metanotum is depressed, the metanotal spines shorter 

 and the nodes of the pedicel shghtly larger than in the g . Wings 

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



Kei/ to the Sjyecies. 



a. Shafts of mandibles thickened in middle .... S. li/roessa, p. 148. 



b. Shafts of mandibles not thickened in middle. 

 a'. Pronotum punctured, opaque. 



rt". Shafts of mandibles ])arallel, 



a^. The innermost of the three mandibular 



teeth the smallest S.fecc, p. 148. 



l2 



