88 BRITISH ANTS. 



$ Head strongly emarginate posteriorly ; clypeus rounded posteriorly, 

 deeply cut-out anteriorly ; mandibles moderate, terminal border short, and 

 furnished with one tooth at the extremity ; maxillary palpi two-jointed ; 

 labial palpi one-jointed ; antennae eleven-jointed, scape cylindrical, broadest 

 anteriorly, funiculus with first joint long, third very short, those following 

 gradually increasing in length, last joint as long as the two preceding taken 

 together, club indistinct, composed of the last three or four joints ; eyes 

 large, situated in the centre of the lateral borders of the head ; ocelli moderate. 

 Thorax short ; epinotum furnished with two distinct tubercles. Fore- 

 wings with one cubital cell, no discoidal cell, and radial cell open. Petiole 

 transverse, thick ; post-petiole twice as broad as long, soldered to the first 

 segment of the gaster ; sting wanting, or rudimentary. Legs without spurs 

 on the intermediate and posterior pairs. 



c? Head less deeply emarginate posteriorly ; clypeus as in the $, but less 

 deeply cut out ; mandibles narrow, rounded, not distinctly toothed ; maxillary 

 and labial palpi as in the $ ; antennae eleven- join ted, but shorter and broader 

 than in the $. Thorax composed of the usual sclerites possessed by winged 

 male ants ; pronotum short ; mesonotum without Mayrian furrows ; a 

 tubercle takes the place of the articulation of the fore wings. Petiole and 

 post-petiole short, very broad and resembling segments of the gaster ; gaster 

 broad, thick and strongly bent beneath the body, convex above, and concave 

 beneath ; genital organs large, prominent. 



Original description [Forel Denkschr. Schweiz. Ges. Naturw. 26 

 93 (1874)] : 



" Genus Anergates nov. genus. 



(a sine ; epyarys operarius). 



Operaria : Deest. 



Femina : Petioli articulus primus crassus, obtusus, latior quam longior ; 

 secundus antice convexus, duplo latior quam longior, abdominis segmento 

 primo coalitus. Caput postice valide emarginatum. Palpi maxillares 2, 

 labiales 1 articulati ; palporum articuli breves et crassi. Antennae 11 

 articulatae ; scapus cylindricus ; flagelli articulus primus longus, secundus 

 brevior, tertius brevissimus ; articuli sequentes sensim usque ad apicem in 

 longitudinem et latitudinem crescunt ; articulus ultimus duos praecedentes 

 una sumptos longitudine aequat. Mandibulae haud latae, margine terminali 

 brevi, acuto, apice cum dente uno. Clypeus postice rotundatus, antice in 

 medio usque ad marginem posteriorem profunde lateque excavatus. Clypei 

 partes laterales longitrorsum nequaquam angustatae, ut fieri solet. Laminae 

 frontales breves, elevatae, vix divergentes. Area frontalis et sulcus frontalis 

 variabiles. Oculi ad media capitis latera. Fossa antennalis profunda. Alae 

 superiores cellula cubitali una, discoi'dali nulla ; costa transversa cum costa 

 cubitali, vel cum ramo cubitali externo conjuncta. Cellula radialis aperta. 

 Metanotum tuberculis elevatis duobus. Pedes non longi. Aculeus inchoatus 

 aut nullus. Pedes medii et posteriores sine calcaribus. 



Mas : Allae nullae. Palpi, oculi, ocelli, laminae frontales et fossa anten- 

 nalis ut in $. Clypeus ut in $, sed excavatione paulo minus profunda. Caput 

 etiam paulo minus postice emarginatum. Area frontalis et sulcus frontalis 

 variabilia. Mandibulae haud latae, ad apicem rotundatae, sine dente et sine 

 margine terminali distincto. Antennae 11 articulatae ut in $, sed breviores 

 et crassiores. Thorax ut in maribus alatis, pronoto brevi, scutello, proscutello 

 et postscutello praeditus. Locus alarum superiorum articulationum pro- 

 tuberantia signatus est. Mesonotum sine sulcis convergentibus. Metanotum 

 in medio paulo concavum, sed absque tuberculis. Pedes breves, crassi. 

 Petioli articuli ambo breves, latissimi, abdominis segmentis simillimi. Abdo- 

 men maximum, crassum, infra ita incurvum ut genitalia externa fere sub 

 segmento primo sita sint : abdominis pars dorsalis convexa est, pars ventralis 

 concava. Squamae genitalium externorum fere circulares, magnae, abdo- 



