Hetcrogyna and Fossorial Hymenoptera. 207 



6. fusca, Linn. Syst. Nat. ed. x. 1, p. 580. Fig. Latr. 



Hist. Nat. Fonrm. jjI. vi. fig. 32. 



(? dark black-brown, shining, with a somewhat 

 bronzy tint. Scape of the antennae of the same colour 

 as the head ; frontal area dull, legs and genital segments 

 testaceous-red. Length 8 mill. 



2 dark brown, polished, with a bronzy tint, only 

 the legs and scape of the antennae dull brownish red ; 

 head and thorax with a few erect hau's. Abdomen 

 remotely and very shallowly punctured, bearing a few 

 scattered bristly hairs. Length 8 mill. 



^ dark brown, with a bronzy tint, covered with an 

 exceedingly fine sericeous pubescence, which gives it a 

 sheeny appearance ; legs and antennae slightly paler. 

 Abdomen with a few short, pale, bristly hairs near the 

 apex of each segment. Length 5 — 8 mill. 



Hah. — Very common ; makes its nest in the ground. 



Very closely allied to cunicidaria, and I have little 

 doubt that Emery and Forel are right in considering 

 them as merely races of the same species ; there seems 

 to be no structural character to distinguish one from the 

 other, and their habits are very similar ; still they 

 generally differ considerably in colour, but occasionally 

 a ^ is found which it would be almost impossible to 

 refer to one or the other with any certainty. 



7. gagates, Ltr. Essai Fourm. France, p. 36. 



I have a single ^ which belongs to this form. Its bright 

 shining, glabrous body, scattered over with brownish 

 bristly hairs, separates it from, fusca. 



Length 7 mill. 



Hab. — Bournemouth. 



Smith gives this as a new species to England in Ent. 

 Annual for 1866, but has omitted it from his Catalogue. 

 Emery and Forel consider it as another race of fusca. 



Lasius, Fah. 



Syst. Piez. p. 415. 



Formica pars, Smith. 



Differs from Formica in having the <? much smaller 

 than the ? , and in the shape of the antennae (see table of 

 genera, ante a). 



