22 HY.UENOPTERA ACULEATA. 



Bare, lias only occurred so far as I know at Bourne- 

 mouth and Parkstone, where it makes nests somewhat 

 like those of rufa but much smaller, and frequently on the 

 open heath. Swarms about midsummer. 



F. fusca, Lafr., (race rujibarbis, Fab. = cun^c^^lar^a, 

 Ltr. ; race, gar/ates, Ltr.). 



c? Elongate, dark black-brown ; eyes not hairy, vertex of 

 head convex, clypeus entire ; thorax without semi-erect 

 hairs above, wings slightly clouded, legs, and genital 

 armature testaceous. 



$ and $ entirely bronzy-brown, or with the front of the 

 face, the sides of the thorax and apex of theproiDodeum, and 

 scale of the petiole in the ? , or the entire thorax in the $ 

 red, as well as the antennae and legs in both sexes ; the 

 bright coloured specimens belong to the race rufibarhis, but 

 forms intermediate in colour occur, which are difficult 

 to assign to either race for certain ; general surface and 

 that of frontal area dull in the ^ , except in the race gagates, 

 surface shining or dull in the ? , abdomen clothed with 

 fine sheeny pubescence in 5 of fusca (type), dull and with 

 a few erect hairs in the race rvjiharhis, shining with pale 

 hairs near the apex of each segment in the race gagates. 



L. c? ? 8-10 mm., ? 5-8 mm. 



The typical form of this species is usually common. 

 rufibarhis is more local but widely distributed; of gagates I 

 have only seen a single British ^ from Smith's collection, 

 without note of locality ; it is smaller and paler than Con- 

 tinental gagates, although agreeing with it in other cha- 

 i-acters. This species usually nests under ground, but rarely 

 in stumps of trees — the ^ and ? swarm about August. 

 Several myrmecophilous Coleoptera occur with this species. 



LASIUS, Fab. 

 Characters of Formica, but c? and ^ about equal in size, 

 ? much larger. $ varying very little in size, legs shorter 



