FORMICA. 



281 



Lit-Phil. Soc. 12 222 (1908) 60 ; Wasmann Biol. Centralb 28 369-376 (1908) 61 : 

 Arch. Tri. Inst. Grand Ducal Luxemb. 4 44-75 (1909) 62 ; Donisthorpe Ent. 

 Rec. 21 257 (1909) 63 : Zool. 1909 463-466. Tf. 1, 2 64 ; Forel Arch. Sc. Phy- 

 Nat. 28 Sept. 6-8 (1909) 65 ; Viehmeyer Zeits. Wissens. Insektenbiol. 5 353-356 

 390-394 (1909) 66 ; Emery Deutsch. Ent. Zeitschr. 1909 182-184 67 ; Wasmann 

 Biol. Centralb. 30 481 (1910) 68 ; Wheeler Ants 454-458 (1910) 69 ; Donis- 

 thorpe Ent. Rec. 22 83 (1910) 70 : Trans. Ent. Soc. Lond. 1910 142-150 71 

 1911 178-179 72 : Entom. 44 390 (1911) 73 ; Forel Int. Ent. Cong. Bruxelles 

 2 1910 101-104 (1911) 74 ; Donisthorpe Ent. Rec. 24 9-10 (1912) 75 : 25 65 

 (1913) 76 : Rep. Lancs-Chesh. Ent. Soc. 36 1912 41-42 (1913) 77 ; Crawley and 

 Donisthorpe Int. Ent. Cong. Oxford 2 1912 55-63 (1913) 78 ; Formica sanguined, 

 sanguinea Wheeler Bull. Mus. Comp. Zool. 53 401-403 (1913) 79 ; Formica 

 sanguined Riischkamp Biol. Centralb. 33 668-675 (1913) 80 . Raptiformica 

 (Formica) sanguinea Forel Ann. Soc. Ent. Belg. 57 361 (1913) 81 . Formica 

 sanguinea Donisthorpe Ent. Rec. 26 41 (1914) 82 ; Crawley Ent. Rec. 26 141 

 (1914) 83 ; Pinkney Ent. Rec. 26 142 (1914) 84 . 



Fig. 90. Anterior portion of head of Formica sanguinea ^ to 

 show emargination of clypeus. 



$ Head, thorax, petiole, antennae, and legs, lighter or darker red, gaster 

 greyish black. Front and vertex of head darker, sometimes blackish ; gaster 

 sometimes reddish at base of first segment ; hairs, and pubescence except on 

 gaster, sparse. 



Head broad, slightly, but widely emarginate posteriorly ; clypeus emar- 

 ginate in centre of anterior border, not distinctly carinate except in 

 some specimens ; frontal area finely shagreened ; mandibles broad, furnished 

 with strong teeth on terminal border. Thorax robust, the constriction 

 between mesonotum and epinotum deep and angular ; epinotum highest 

 posteriorly, forming a rounded angle, descending in a rather flat straight 

 surface to base. Scale broad, usually slightly emarginate at apex ; gaster 

 covered with thick grey pubescence. Long. 5-9 mm. 



$ Usually darker than the ^, pubescence and hairiness as in the ^ ; young 

 winged females are generally lighter in colour than old queens. 



Head more blackish than in the ^, the red colouring more brown ; clypeus 

 emarginate in centre of anterior border. Thorax large ; mesonotum flat 

 above, with slight blackish patches at anterior border and insertion of the 

 wings. Wings brownish with basal halves darker, veins and pterostigma pale 

 yellowish brown. Long. 9-5-10-5 mm. (9-11 mm. teste Wheeler). 



<$ Black, apex of antennae, legs and genitalia reddish yellow. Head dull, 

 broad, with posterior border not emarginate ; clypeus emarginate in centre 

 of anterior border ; mandibles with four or five teeth on the terminal border. 

 Thorax dull. Scale thick, widely but not deeply emarginate at apex ; gaster 

 somewhat shining, finely pubescent. Wings as in $, but with veins and 

 pterostigma darker. Long. 610 mm. 



