MYRMICA. 135 



Thorax : epinotal spines variable in length, the space between sometimes 

 smooth and shining, sometimes somewhat striate transversely. Long. 

 4-5 mm. (3-5-5 mm. teste Forel.) 



The striation and reticulation of the head, and the rugosity of 

 the thorax and pedicel is variable, often in individuals from the 

 same colony ; the denticornis Curtis, and the var. arduennae 

 Bondroit appear to be founded on such varieties. 



? Head and gaster blackish brown, thorax and pedicel red, with some black 

 patches on the former ; often the whole body is blackish brown ; antennae and 

 legs lighter. 



Other characters as in the ^. Long. 5-5-5 mm. (5-6^ mm. teste Forel.) 



<J Blackish brown, shining ; mandibles, club and base of scape of antennae, 



tarsi, femora and tibiae at base and apex, and extremity of gaster yellowish. 



Fig. 73. Antenna of Myrmica lobicornis 



Head finely striate, with distinct frontal channel ; frontal area finely striate 

 longitudinally, or simply shagreened ; antennae with scape abruptly bent at 

 the base, about half the length of the funiculus ; funiculus short, with a 

 four- jointed club. Thorax striate ; space between epinotal tubercles smooth 

 and shining. Petiole finely striate ; post-petiole smooth and shining. Long. 

 5-5-5 mm. (5-6 mm. teste Forel.) 



Original description of Myrmica lobicornis Nylander. g $ [Acta 

 Soc. Sc. Fenn. 2 932-934 (1846)] : 



" Operaria : obscure rubida sparse flavido-pilosula, capite et abdomine 

 fusco-nigrescentibus, mandibulis antennisque rufescentibus ; capite, thorace 

 et petiolo longitudinaliter striatim profunde rugosis ; antennarum scapo ad 

 basin curvato, supra lobo transversim posito ; metanoti spinis longis. 



<^>. Long. If -2 lin. Similis praecedenti, at minus forte robusta, colore 

 jam et scapi formatione alia distincta. Mandibulae pallide ferrugineae apice 

 summo fuscescente. Area frontalis conspicua. Lamina frontalis ut in 

 praecedente, marginibus infra utrinque dilatatis parum reflexis. Antennae 

 obscurius, quam mandibulae, rufae ; scapus lobo compresso antice parum 

 concaviusculo, formae laminae subsemirotundatae, transversim supra 

 flexuram prope basin posito. (Est hie lobus paullo major, compressior, neque 

 oblique positus, sicut in praecedente). Caput lateribus reticulatim rugosum. 

 Thorax et petiolus longitudinaliter crasse scabri, sordide fuscescenti-rubidi ; 

 nodi sculptura rugosa crassa inaequali longitudinali. Pedes sordide ferru- 

 gineo-pallescentes. Abdomen apice obsolete pallescens. 



Femina : fusca sparse flavido-pilosula ; mandibulis apice, antennis et 

 pedibus pallide rufescentibus ; capite, thorace et petiolo longitudinaliter 

 striatim profunde rugosis ; antennarum scapo ad basin curvato, supra lobo 

 transversim posito ; metanoti spinis longiusculis ; alis hyalinis nervis et 

 stigmate dilute cinereo-pallescentibus. 



9- Long. 2 lin. Similis quoque feminae praecedentis, sed colore et scapo 

 aliter formato mox distincta. Mandibulae apicibus late pallide-rufescentibus. 

 Area triangularis, lamina frontalis et scapus antennarum ut in ^. Thorax 

 fuscus, pronoto antice inaequaliter crasse rugoso, ceteroquin longitudinaliter 

 crasse striatus, infra et apice obsolete rubido-rufescens. Nodi fusci infra 

 rubido-rufescentes, crasse sublongitudinaliter rugosi. Alae ut in praecedente ? 



