270 roEMiciD.i:. 



Apliaiuo^aster, Mni/r, Vrr/i. zool.-bot. J'er. Wien, iii (1853), p. 107. 

 Iscliuomyrniex, Mayr, Verk. zool.-bot. Gex. Il'ien, xii (1862), p. 738. 



Tyjie, A. sardous, Mayr, from Sardinia. 



lianr/e. Both liemisplieres. 



^ . Of slender form. Head longer than hroad, often elongated 

 posteriorly into a neck ; mandibles subtriangnlar, the masticatory 

 margin dentate, the outer margin not strongly curved ; clypeus 

 somewhat Hat, the anterior margin transverse, ])Osteriorly produced 

 between the bases of the antennae, and the margin roimded ; frontal 

 area depressed ; antennal carina) short, posteriorly convergent, 

 autennal and clypeal hollows large, confluent ; antennae 12-joiuted, 

 slender and filiform, the club of the flagellum not much thickened, 

 formed of the apical four joints ; eyes of moderate size, lateral, 

 placed about the middle of the head ; ocelli absent. Thorax 

 narrow, elongate ; pro-mesonotal suture generally slight, meso- 

 metanotal suture very distinct ; metanotal spines short, triangular, 

 dentiform, genei'ally more or less erect ; legs remarkably long and 

 slender, the intermediate and posterior tibia; with one simple spur, 

 the spur of the anterior tibia? pectinate, claws simple. Pedicel 

 elongate; the 1st node subconical, rounded above, generally with 

 a long petiole in front ; 2nd node oval, usually longer than broad ; 

 abdomen oval, very convex above and below. Pilosity more or 

 less abundant, long and somewhat coarse, often setiform, the 

 hairs obtuse at apex. 



2 . Eesembles the ^ ; ocelli present ; wings long and somewhat 

 narrow", with one cubital cell. 



(S . Antennae 13-jointed, the scape very short, the apical 5 joints 

 of the flagellum the longest ; wings as in the $ . 



Keu to the Species. 



A. Head posteriorly produced and constricted, 

 forming a more or less cylindrical neck or 

 collar. 

 (I. Metanotum transversely rugose above, ob- 

 liquely and somewhat coarsely striate on the 



sides A. bcccarii p. 271. 



b. Metanotum smooth or at most with a few 

 scattered punctures. 

 a'. Length under o mm. ; 2nd node of pedicel 



as broad as long A. longipes, p. 272. 



b'. Length over 5 mm. ; 2nd node of pedicel 



distinctly nearly twice as long as broad . . A.fccc, p. 273. 



as true genera so far as the limited faima dealt with in this volume is con- 

 cerned, hchnomyrmex (tyjie ]\h/i-mic(i loujlpcs, Smith) I regard simply as 

 an exaggerated slender form of Aplxenogatitcr. On the otlicr liand, J\Ici>sor, 

 Forel (type Formica barbara, Linn.), seems to me clearly differentiated, not 

 only by its far more massive build, but by xhe polymorpliism of its workers. 

 It is. moreover, a strict vegetarian and harrester like }lolcomi/rinex, whereas 

 AphwHOC/astcr is carnivorous. 



