156 BRITISH ANTS. 



Art. 12 516-517 (1880) 13 ; Saunders Trans. Ent. Soc. Lond. 1880 219-220 14 : 

 Ent. Mo. Mag. 17 69 (1880) 15 . Leptothorax tuberum F. v. nylanderi Er. 

 Andre Spec. Hym. Europe 2 300 (1881) 16 . Leptothorax nylanderi Rothney 

 Ent. Mo. Mag. 18 262 (1882) 17 ; Saunders Ent. Mo. Mag. 20 19 (1883) 18 ; 

 Dalla Torre Cat. Hym. 7 125 (1893) 19 ; Farren- White Ants' Ways 244 (1895) 20 ; 

 Morley Ent. Rec. 6 114 (1895) 21 . Leptothorax tuberum F. race nylanderi 

 Saunders Hym-Acul. 38 (1896) 22 ; Morley Hym. Suffolk 2 2 (1899) 23 . Lepto- 

 thorax nylanderi Donisthorpe Ent. Rec. 14 16 (1902) 24 : Trans. Leicester 

 Lit-Phil. Soc. 12 227 (1908) 26 : Ent. Rec. 20 282 (1908) 26 ; Baynes Ent. 

 Rec. 23 98 (191 1) 27 ; Leptothorax tuberum F., subsp. nylanderi Donisthorpe 

 Entom. 44 390 (191 1) 28 . Leptothorax nylanderi Donisthorpe Ent. Rec. 26 

 39 (1914) 29 . Leptothorax tuberum F. subsp. nylanderi Crawley Ent. Rec. 

 26 92, 95, 107 (1914) 30 . 



^ Yellow, head above often reddish brown, gaster with a broad brown band 

 on the first segment, and sometimes with narrow bands on the succeeding ones. 

 The whole of the antennae, mandibles, and legs yellow. 



Head finely longitudinally striate ; clypeus as in tuberum ; antennae 

 twelve- join ted. Thorax finely rugose, with a distinct impression between 

 the mesonotum and epinotum ; epinotal spines broad at the base, as long as 

 two-thirds of the basal surface of the epinotum. Pedicel finely rugose, gaster 

 smooth and shining. Legs without erect hairs. Long. 2-3-3'5 mm. 



$ Yellow, head red to reddish brown, thorax mostly yellow, with two brown 

 patches at the insertion of the wings, and a brown patch at the base of the scutellum, 

 pedicel brownish, gaster yellow with a broad blackish brown band at the base of 

 the first segment, and narrow bands at the base of the other segments ; mandibles, 

 clypeus, the whole of the antennae and legs yellow. 



Head longitudinally striate ; clypeus as in tuberum ; antennae twelve- 

 jointed. Thorax : mesonotum longitudinally striate, but not so coarsely as 

 in tuberum ; scutellum smooth and shining in the centre ; epinotal spines 

 long, one-third as long as the basal face of the epinotum. Petiole and post- 

 petiole more finely striate than in tuberum ; gaster smooth and shining. Wings 

 clear, radial cell small, closed. Long. 4-2-4*7 mm. 



Fig. 76. Pedicel of Leptothorax nylanderi <$. 



<$ Blackish brown, the clypeus, and sometimes the rest of the thorax, reddish 

 brown, mandibles, antennae, legs and extremity of gaster pale dirty yellow. 

 On the whole a little more robust than the male of tuberum. 



Head a little more finely rugose than in tuberum ; mandibles with four 

 to five teeth* ; antennae with joints as in tuberum. Thorax much less rugose 

 than in tuberum ; mesonotum smooth and shining between the Mayrian furrows, 

 the rest of the thorax is shining and smooth with the exception of some fine 

 striae ; epinotum without, or with only very faint tubercles. Pedicel smooth 

 and shining ; petiole viewed in profile raised in centre, higher and less strongly 

 rounded than in tuberum ; post-petiole about as high as long ; gaster smooth 

 and shining. Wings as in the <j>. Long. 3-3-2 mm. (2'5-3-2 mm. teste Forel.) 



Original description of Myrmica nylanderi Forster [Hym. Stud. 

 1 53 (1850)] : 

 " Mas : Fusco-nigricans, laevis ; capite et metathorace subtilissime nigulosis ; 



mandibulis et clypeo rufis ; palpis, an tennis 13-articulatis pedibusque 



* Five-toothed in the specimens before me. 



