162 BRITISH ANTS. 



and two half -grown larvae 9 . These were named by Forel " corticalis 

 var. with longer spines," and Crawley describes the female and 

 worker as follows 11 : 



" ^ Thorax finely rugose, less than in nylanderi. Spines very broad at 

 base, long, about two-thirds as long as the basal face of epinotum. Reddish 

 yellow ; mandibles, whole of antennae, and legs of the same colour ; top of 

 head dark brown ; whole of gaster as seen from above, except a small patch 

 on the front of the first segment, black-brown. L. 2-3 mm." 



" ? Mesonotum finely striated longitudinally. Middle of scutellum 

 smooth and shining. Spines long, about one-third as long as basal face of 

 epinotum. Antennae, mandibles, mesonotum, legs, and front of first seg- 

 ment of gaster, entirely reddish yellow ; head, scutellum, and remainder of 

 gaster, dark brown. L. 3-7 mm." 



L. corticalis appears to be rare in the centre and south of Europe, 

 and lives entirely under the bark of trees, sometimes constructing 

 small galleries in the bark. 



Leptothorax tuber um F. 



Formica tuberum Fabricius Syst. Ent. 393 (1775) 1 ; Latreille Ess. Hist. 

 Fourmis France 47 (1798) 2 . Formica tuberosa Latreille Hist. Nat. Fourmis 

 259 (1802) 3 . Myrmica tuberosa Latreille Hist. Nat. Crust. Insect. 13 259 

 (1805) 4 . Manica tuberum Jurine Nouv. Meth. Class. Hym. 279 (1807) 5 . 

 Myrmica unifasciata Shuckard Mag. NH. (n.s.) 2 626 (1838) 6 . Myrmica 

 tuberum Nylander Acta. Soc. So. Fenn. 2 939 1057 (1846) 7 . Myrmica uni- 

 fasciata Curtis Trans. Linn. Soc. Lond. 21 216 (1854) 8 . Stenamma albipennis 

 Curtis Trans. Linn. Soc. Lond. 21 218 (1854) 9 . Leptothorax tuberum Mayr 

 Verh. Zool. Bot. Ver. Wien 5 442 (1855) 10 . Myrmica unifasciata F. Smith 

 Trans. Ent. Soc. Lond. (n.s.) 3 128-129 (1855) 11 . Stenamma albipennis 

 F. Smith Trans. Ent. Soc. Lond. (n.s.) 3 134 (1855) 12 . Myrmica unifasciata 

 F. Smith Ent. Ann. 1858 39 13 : 1862 70 14 . Leptothorax unifasciata F. Smith 

 Ent. Mo. Mag. 2 29 (1865) 15 . Myrmica unifasciata F. Smith Ent. Ann. 1868 

 92 16 . Leptothorax tuberum Forel Denkschr. Schweiz. Ges. Naturw. 26 85 17 

 227 18 415 19 (1874). Leptothorax unifasciata Saunders Trans. Ent. Soc. Lond. 

 1880 220 20 . Leptothorax tuberum Er. Andre Spec. Hym. Europe 2 298 (1881) 21 . 

 Leptothorax unifasciata Dale Ent. Mo. Mag. 17 236 (1881) 22 ; Saunders Ent. 

 Mo. Mag. 20 87 (1883) 23 . Leptothorax tuberum Adlerz Bih. Sv. Vet. Acad. 

 Handl. 11 82 (1886) 24 ; Fletcher Ent. Mo. Mag. 25 313-314 (1889) 25 . Lepto- 

 thorax tuberum tuberum Bruyant Fourmis France centr. 58 (1890) 26 . Lepto- 

 thorax unifasciata Perkins Ent. Mo. Mag. 27 195 (1891) 27 . Leptothorax 

 tuberum Dalla Torre Cat. Hym. 7 127 (1893) 28 . Leptothorax unifasciata 

 Farren-White Ants' Ways 244-245 (1895) 29 . Leptothorax unifasciatus 

 Saunders Hym-Acul. 38 (1896) 30 . Leptothorax tuberum Vic. Hist. Worcester 

 1 87 (1901) 31 . Leptothorax tuberum F., race unifasciata Vic. Hist. Sussex 1 

 131 (1905) 32 ; Nevinson Ent. Mo. Mag. 41 22 (1905) 33 . Leptothorax tuberum 

 Vic. Hist. Cornwall 1 182 (1906) 34 . Leptothorax unifasciatus (teste Saunders) 

 Donisthorpe Ent. Rec. 19 254 (1907) 35 : Trans. Leicester Lit- Phil. Soc. 

 12 227 (1908) 36 . Leptothorax tuberum F. subsp. unifasciata Donisthorpe 

 Entom. 44 390 (191 1) 37 . Leptothorax unifasciata Donisthorpe Ent. Rec. 24 

 5 (1912) 38 . Leptothorax tuberum Donisthorpe Ent. Rec. 24 306 (1912) 39 . 

 Leptothorax tuberum subsp. tuberum Crawley Ent. Rec. 26 93, 96, 108 (1914) 40 . 



^ Yellow, or slightly reddish yellow, the head above anteriorly, sometimes 

 the vertex, and the club of antennae blackish brown. Gaster with an irregular 

 brown patch across the base of the first segment and extending up each side. 

 The legs and the rest of the antennae yellow. 



