MYRMICA. 



267 



Keij to the Species. 



a. Thorax more or less lougitudiually rugo.se, 

 striate. 

 a'. Medial portion of clypeus produced, an- 

 gular, the apex obtuse. 

 «■. Length 6 mm. ; metanotal spines long, 



as long as the basal face of metanotmn. M. rugosa, p. 268. 

 b'. Length O'o-i'o mm. ; metanotal spines 

 short, only about iialf as long as basal 



ftice of metanotum M. smythiesi. p. 269. 



b'. Medial portion of clypeus not produced, 

 not angular, transverse. 

 or. Head regularly longitudinally striate, 



the striaj not broken or reticulate .... M. riUe, p. 267. 

 b^. Head irregularly longitudinally striate, 

 the strige coarser, broken and posteriorly 



reticulate , . M. marr/arit^, p. 267. 



o. Thorax transversely rugose striate J/, inezce, p. 268. 



305. Myrniica ritae, Emery, Ann. Mus. Civ. Gen. xxvii (1889), p. 501, 

 ^, pi. 11, fig. 27. 



^ . Head and autennte reddish yellow, the head shaded ^itb 

 fuscous ou the front ; thorax and pedicel dark hrown, almost 

 black, legs yellow, the abdomen dark brown above and below in 

 the middle, yellowish at base, along the sides and at apex; pilosity 

 pale, very sparse, pubescence entirely wanting. Head shining, 

 longitudinally coarsely sulco-striate, mandibles shining, striate at 

 base ; clypeus narrow, the strise on the medial portion subobsolete; 

 frontal area depressed, smooth and shining; antennal carinse 

 somewhat wide apart, parallel, reaching very nearly level with 

 the top of the eyes ; anteunce long, the scape extending beyond 

 the top of the head ; eyes prominent, lateral, placed about the 

 middle of the head ; head more or less oval, but \vith a distinct 

 slightly emarginate posterior border, the cheelvs very convex. 

 Thorax elongate, coarsely rugose, with broken longitudinal furrows; 

 the metanotal backward-pointing spines smooth, slender and 

 acute ; legs smooth, very long and slender. Pedicel : the nodes 

 large, coarsely sculptured, the posterior node posteriorly aud above 

 somewhat smootlier than the anterior node ; abdomen subglobose, 

 highly polished, smooth and shining. 



Length, ^ 4"5-6 nun. 



Hab. Teuasserim, Muleyit, yOOO-4500 ft. {Fea). 



306. Myrmica margaritae, Emery, Ann. Mus. Cir. Gen. xxvii (1889), 

 p. 502, $ . 



^ . Head, thorax and pedicel dark piceous brown, head antci-iorly 

 reddish brown, the mandibles aud antennte brownish yellow, legs 

 and abdomen clear, somewhat pellucid ochraceous yellow ; pilosity 

 short and sparse, pubescence absent. Head with the mandibles 



