FORMICID.E. 23 



than in Formica^fiAtiS. joint of the flagellum swollen in the 

 (J, the second to fifth joints of the flagellum in the ? and 

 y as short as, or shorter than, those at the apex. Forel 

 says that the workers follow one another in line, but never 

 carry each other. We have all four of the European species 

 in this country, although several of their races do not occur 

 with us ; pup8e always enclosed in a cocoon. 



(2) 1. .Tet black, ? and 5 ^^ry shining . . FULioiNOsns. 

 (1) 2. Brownish, or yellowish, ? and 5 not 



very shining. 



(4) 3. (^ with the mandibles five-toothed ; ? 



with the head wider than the thorax, 

 wings very dark at the base ; 9 tes- 

 taceous, its tibife generally with ex- 

 serted hairs ; soale of the petiole 



high UlIBEATUS. 



(3) 4. (J mandibles one-toothed, ? with the 



head much narrower than the thorax, 

 5 either pale without exserted hairs 

 on its tibias, and with the scale of the 

 petiole low, or brown, tibiee with or 

 without exserted hairs. 

 (6) 5. (^ and ? with the wings clouded at the 

 base, cj with the forehead not chan- 

 nelled, 5 pale yellow .... i'layus. 



(5) 6. (J and $ , wings clear, forehead of ^ 



with a nan'owly impressed channel 



below the ocelli, 9 brown . . . Niger. 



L. fuliginosus, Ur. — Jet black, shining, liead widely 

 excavated posteriorly ; autenuaj and legs more or less 

 piceous. 



cJ head dull, antenuiB pale towards the apex, thorax with 

 a few indefinite punctures, and scattered hairs, wings 

 slightly dusky at the base, abdomen shining. 



L. 4-5 mm. 



5 and ? very shining, head and thorax, especially in the 

 ? , clothed with short hairs, wings in the ? dusky tov^ards 

 the base, abdomen with a few pale hairs at the apices of the 

 segments. 



L. ? 6 mra., ^ 3-5 mm. 



Generally distributed, nests in trees or old posts, rarely 



