Descriptions of Amurland Chalcidise : by F. Walkek, Esq. 



There are two great regions in the higher latitudes of the 

 Northern Hemisphere. The first includes Northern Asia, 

 with Northern Europe ; the second is formed by North 

 America. There is yet much to be noticed in the mutual 

 likeness and difference between the insect races of these 

 two regions, of wliich the first is far more wide than tlie 

 second, and may be divided into Northern Europe and 

 Northern Asia, or into England and Northern Asia, and 

 these two may be considered separately or together with 

 the allied species of North America. The present dif- 

 ferences in the Insect-Fauna of the region between 

 England and North-east Asia were probably established 

 after the glacial period, and the following list of Amurland 

 Chalcidice is preparatory to a sei'ies of notices of the 

 Hymenoptera and Diptera of Amurland. 



1. Eurytonia generalis. 



Male. Black, slender, nearly cylindrical. Head and 

 thorax thickly and finely punctured. Head broader than 

 the thorax. Antennae slender ; joints of the ttagellum 

 linear, verticillate-pilose, slightly petiolated. Prothorax 

 fully twice as broad as long, with no trace of pale calli. 

 Scutum and scutellum elongated. Metathorax scabrous. 

 Petiole and abdomen together shorter than the thorax. 

 Petiole about one-third as long as the abdomen, wliich is 

 elliptical, smooth, shining, and very convex. Legs slender; 

 knees whitish ; tarsi piceous. Wings pellucid ; veins pale 

 piceous ; idna nearly half as long as the humerus ; radius 

 a little more than lialf as long as the ulna ; cubitus a little 

 shorter than the radius; stigma small. Length of the body 

 1| line. 



Female. Antennae subfiliforin. Abdomen subfusiform, 

 lanceolate at the tip, narrower than the thorax, which it 

 almost equals in length. Length of the body 2 lines. 



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