36 HYMENOPTERA ACULEATA. 



The 9 somewhat resembles that of Tetramorinm CcT«- 

 pitum, but the long first joint of the petiole and the 

 rounded anterior angles of tbe thorax, as well as the 

 reticulated surface of the head, will at onco distinguish it. 



Eare. Under dead leaves, Chobham, near a nest of For- 

 viica rvfa, and another of L. fuliginosus ; Ilfracombe one 

 S September. Maidstone two ? August and September 

 (Fiishy). London District; Tunbridge Wells; Norwich; 

 D al ; Freshwater; Isle of Wight; Seaton ; Mount Edg- 

 combe ; Clovelly ; Godraanstone ; all winged and occur- 

 ring in October ; (Dale). Corfe Castle ; (G. F. Smith). 

 Lynton ; Charlton, Kent ; (TF. F. White). Bickleigh, Devon ; 

 (Blynell). 



LEPTOTHORAX, Mayr. 



S and ? winged, ^ apterous. (J antennje twelve or 

 thirteen jointed, ? and ? eleven or twelve jointed, frontal 

 area indistinct, maxillary palpi five-jointed, labial palpi 

 three-jointed. Thorax in front rounded in the ? . wings 

 with one submarginal, and one discoidal cell, tibis of inter- 

 mediate and posterior legs without calcaria in the ? and 

 5 ; all the species clothed with more or less clavate hairs. 



The species of this genus generally form small commu- 

 nities and make their nests in dead wood, under bark, or 

 sometimes in bramble stems ; occasionally in the ground or 

 under stones. Their nests have not been known to contain 

 aphides or myrmecophilous beetles. We have two British 

 species, one of which has two distinct races which used to 

 be considered as specifically distinct, the species of the 

 Palffiarctic region number about twelve. 



1. Antennae of J twelve-jointed, of ? and 9 eleven- 



jointed ACERVORUM. 



2. AntennjB of (J thirteen-jointed, of ? 'and 5 twelve- 



jointed TUBERUM. 



L. acervorum, Fab. — c? pitchy black, mandibles and 



