NATURALIST. 



239 



BRITISH ANTS— By G. G. BIGNELL. 



(Continued from page 223 J 

 Length, 5-6 mill. 



Habitat. — Generally distributed and 

 common. 



2. Mjrrmica Isevinodis, Nyl. 



Extremely like ruginodis. 



Male. — Differs by being smaller, antennae 

 much shorter, the scape slightly shorter 

 in comparison with the flagellum, and the 

 legs covered with long erect hairs. Length, 



5- 6 mill. 



Female.— Differs by the metathoracic 

 spines being much shorter and wider, each 

 spine being wider at the base than it is long 

 and quite straight, the space between the spines 

 being smooth and shining ; the nodes of the 

 petiole also are rather smoother. Length, 



6- 7 mill. 



Worker. — Differs as in the female, also 

 the thorax less deeply rugose and the 

 rugosities not longitudinal. Length, 5-6 mill. 



Habitat. — Common, but not so plentiful 

 as the preceding. 



3. Myrmica sulcinodis, Nyl. 



Male differs from both the preceding 

 in being darker (nearly black) ; head not 

 shining, with the frontal area longitudi- 

 sulcate ; mesothorax in front dull, more or 

 less transversely wrinkled, rather deeply 

 and longitudinally rugose behind the con- 

 verging lines ; scutellum and base of the 

 metathorax also rugose; first node of the 

 petiole dull and more or less rugose, second 

 polished and shining ; abdomen and legs 

 much as in the preceding. Length, 6 mill. 



Female may be known by being darker 

 redder brown colour, the head more deeply 

 rugose and reticulated behind the eyes at 

 the sides, the scape of the antenncB cnirved 

 suddenly near the base, the frontal area sul- 

 cate, the thorax and nodes of the petiole 

 deeply, longitudinally and rugosely sulcate. 

 Length, 6-7 mill. 



Worker like the female. Length, 5-6 

 mill. 



Habitat. — Rare. Wales, Hampshire, 

 Chobham. 



4. Myrmica scabrinodis, Nyl. 



Male may be distinguished from the 

 precefling by the short scape of the an- 

 tennae, which is not longer than the Jirgt two 

 or three joints of the flagellum^ and by hav- 

 ing the legs very densely covered with long 

 erect hairs. Length, 6 mill. 



Female very like sulci?iodi8, but with the 

 scape of the antennae thicker and rather 

 shorter, distinctly geniculated near the base; 

 it also appears to be flattened at the turn : 

 this appearance is given by a sort of angu- 

 lar dilatation on its upper side. The thorax 

 and nodes of the petiole are less rugose. 

 Length, 6-7 mill. 



Worker like the female. The colour is 

 testaceous, as in ruginodis and Icevinodi*. 

 The geniculated scape of the antenruB dis- 

 tinguishes it at once. Length, 5-6 mill. 



Habitat. — Generally distributed and 

 common. 



5. Mrymica lobicomis, Nyl. 



Male differs from scabrinodis in the 

 long scape of the antennae, which is half as 

 long as the flagellum, and from the other 

 species in the scape being angularly bent 

 at the base. 



Female in colour as dark as 8ulcinodi4, 

 the scape of the antennas geniculated as in 

 scabrinodis, but not flattened at the bend, 

 the bend having a distinct spine. Length, 

 6-7 mill. 



Worker like the female. Length, 5-6 mill. 



Habitat. — Rare. Chobham, South 

 Shields, Whitley, Lowestoft, Seaford, &c. 

 Genus STENAMMA, JVcsteo. 



This genus may be known from Myrmica 

 by having only three joints to the labial 

 palpi and four to the maxillary, and by the 

 female and worker having only eleven joints 

 in ihe antennae. The smooth polished sur- 

 face of the head and thorax, and ihe spiJie 

 nndei' the second node of the petiole in the 

 {To be continued on page 255.) 



