(Page 523) 

 sixth ventral joint is feebly emarginate. 



Listributed in the greater part of Europe; in Denmark it is here 

 and there numerous at the edge of lakes and water-courses in alluvium, 

 but as a whole however rather rare (Aalborg, Randers, Silkeborg, Haders- 

 lev; Brahetrolleborg ; Sor/J, vicinity of Copenhagen, at Esrom lake, and 

 several other places). 



55. St. litoralis Thorns. 



(Thorns. Ofv. Vet. Ac. Forh. 1857, 229; Skand. Col. II, 226; Key 

 Brevip. 1884, 166.- ? formicetorum Mannh. . Janglb. Kaf. U. II, 582). 



From crassus , to which smaller form it is closely allied, and pos- 

 sibly falls together with, it may (accd. to Thomson) especially be sep- 

 arated in that: the legs are brownish-red or pitch-brown, and abdomen 

 somewhat more robustly punctated. The front-grooves of the head are 

 most often somewhat more distinct and their interval at middle without 

 carina-line. L. 2-2.5 mm. 



According to Thomson not rare in Skaane on the strand and at lake- 

 shores. A longer series which I have from the brim of Madum lake (6. 

 1891) and Jul lake (5. 1893), should probably be referred to this spe- 

 cies, of which the deviation from small specimens of crassus however 

 seems small and insignificant, in many instances hardly evincible. 

 Provided that formicetorum Mannh. is same species as litoralis , it should 

 (accd. to Janglb.) also abide in the mounds with Formica rufa (in Middle 

 Europe} . 



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