134 Mr. Smith's Essay on the Genera and 



Genus Stenamma, Stepli. 



Basal joint of the antennae long ; abdominal peduncle 2-jointed, 

 the first petiolate ; antennae l.'J-jointed ; maxillary palpi 4-jointed, 

 labial palpi 3 jointed ; mandibles broad, oblique and 5-dentate. 



Sp. 1. Stenamma Westivoodii, 

 Mas. — Pallido-fuscus, nitidus ; antennis, partibus oris, tarsis, 

 pedum articulationibus pallide testaceis ; alis hyalinis, nervis 

 testaceis ; metathorace sub-dentiforme. 



Stenamma ^esfwoorfii, Steph. Syst. Cat., p. 356, 48,38; Westw, 

 Intro. Class. Ins., ii. 22G, tab. 86, fig. 

 11, and details. 



Male. — Length 1 1 lin. Fusco-testaceous ; the antennae, tarsi 

 and articulations of the legs pale testaceous ; the head and thorax 

 finely rugose above ; the eyes and ocelli prominent, the latter of 

 a glassy brightness : the neuration of the wings as in M. imifas- 

 ciata, the metathorax emarginate its entire length, the lateral 

 angles acute and prominent, scarcely dentate. Abdomen : oblong- 

 ovate, smooth and shining, the extreme apex pale testaceous ; the 

 petiole elongate ; the first segment pear-shaped ; the second sub- 

 globose, wider than the first, and smooth and shining. 



I have great doubts whether this insect possesses sufficient 

 generic distinctive differences to entitle it to a separation from 

 the genus Mijrvilca. I do not possess a specimen, and therefore 

 cannot examine, as I could wish, all parts of the insect; but the 

 only character in which it appears to differ from Myrmica is in 

 having 3-jointed labial palpi. An exannination of the parts of the 

 mouth of several males proves the relative proportions of the 

 joints to be various, and in M. unifasciata the basal joint is so 

 small, or altogether wanting, that I cannot detect it ; I think this 

 male may possibly prove to be that of M. Icevigata. 



Sp. 2. Stenamma albipennis. 

 Stenamma albipennis, Curtis, Trans. Linn. Soc, xxi., 217, 15, 



I do not know this species ; Mr. Curtis gives the locality of 

 Folkestone, near Dover. 



