58 STAPHTLTNID^. [Myrmeclonia. 



Tfl. lug'ens, Gi"iv. This species has very much the appearance of 

 M. cognata, which it resembles rather closely in colour, but it is easily 

 distinguished by its more transverse thorax and distinctly shorter and 

 Ihicker antennae, which are dark Avith the basal joints lighter, instead of 

 Ijeing entirely red, as in the preceding species ; the penultimate joints 

 are also much more strongly transverse ; the elytra are a little longer 

 than the thorax, and have the shoulders a little more broadly testaceous ; 

 the thorax and elytra are very finely punctured, and the hind body is 

 entirely smooth aud shining ; legs reddish testaceous. L. 4-4^ mm. 



Male with the ventral plate of seventh segment of hind body broadly 

 emarginate on apical margin, thorax longitudinally impressed. 



In nests oi Formica fuliffhwsa ; local aud almost entirely confined to the London 

 district, as at present known ; not uncommon sometimes where it occurs. jVIickleham, 

 Sydenham, Croydon, Caterham, Chobham, Tilgate Forest ; Battle, near Hastings. 



IKE. laticollis, Maerk. A very distinct species, rather smaller than 

 any of the preceding, and easily distinguished by its almost uniform dull 

 black colour and very transverse thorax, of which the sides are strongly 

 rounded ; head finely and rather thickly punctured, antennae lighter or 

 darker reddish or reddish brown Avith the base lighter, penultimate 

 joints strongly transverse ; thorax quite twice as broad as long, about as 

 broad at base as base of elytra, very finely ptmctured ; elytra very 

 transverse, but a little longer than thorax, very finely and thickly and 

 somewhat rugosely punctured, not quite as black as the rest of the body, 

 aud occasionally obscurely brownish ; hind body almost impunctate, 

 smooth and shining ; legs reddish testaceous. L. 3|-4 mm. 



IMale with the dorsal plate of seventh segment of hind body broadly 

 truncate and finely denticulate on its apical margin, thorax with an 

 obsolete central furrow. 



In nests of Formica fidighiosa ; not uncommon in the London district and the 

 south, but not found further north. Micklehani, Croydon, Norwood, Chatham, Tilgate 

 Forest, Shipley near Horsham, Rusper, &c. ; I have taken it in some numbers at the 

 top of Luccombe Chine, Isle of VVight, by placing grass in a tree inhabited by 

 F. fuliginosa, and shaking it three or four days after over a sheet of paper. 



IKE. plicata,' Er. A rather long, somewhat parallel-sided species, 

 apterous, of a reddish-testaceous coloiu', with the head, thorax, and a 

 greater or lesser portion of hind body before apex pitchy ; head rather 

 strongly and thickly punctured, antennse long, entirely red, or brownish- 

 red, with the penultimate joints not transverse, and the last joint not as 

 long as the two preceding ; thorax subquadrate, about as long as broad, 

 with sides almost straight, thickly and lather strongly and deeply 

 punctured ; elytra only slightly longer than thorax, entirely reddish 

 yellow, rather more finely punctured than thorax with the punctuati(ui 

 sometimes a little rugose ; hind body very finely and thickly punctured 

 in front, almost smooth behind, fourth and fifth segments with raised 

 prominences in middle. L. 4-5 mm. 



Very rare; has only been taken in Britain by the late Mr. F. Smith and his son, 



