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 sometimes with a small feeble fovea posteriorly before the scutellum; 

 elytra ^-^ longer than pronotum, roundly narrowing posteriorly, convex, 

 their posterior .margin together broadly incurved, whereby the outer hind 

 corners become strongly prominent. Abdomen strongly narrowing anterior- 

 ly, its first three free dorsal joints elongate and singly considerably 

 longer than the fourth or fifth, but all three of equal length an:i very 

 strongly depressed at base, their hindmost part rather convex, very fine- 

 ly and not densely punctated, the two following joints more densely and 

 distinctly punctated. L. 2.5-3 mm. 



In the o the sixth ventral joint of abdomen elongate and rounded off 

 at tip. 



Distributed throughout North and Middle j^urope. In this. country very 



rare and local, at lakes and water-coarses or on damp sand banks (at Eam- 



husso, CJopenhagen, at the Sound, at Maribo lake et al.). 



6. T. constricta Br. 



(Erichs. Kaf. Mk. Br. I, 307; len. Spec. Staph. 70; Kraatz Ins. D. II, 

 151; Thorns. Skand. Col. Ill, 1; I/.uls. et Rey Brevip. 1875, 400; Janglb. 

 Kaf. U. II, 247). 



Very slender and narrow, and easily identified by its anteriorly al- 

 most wasp-like narrowing abdomen and by the unicolorous yellow legs. 

 The first three free dorsal joints of abdomen are more strongly elongate 

 than in coarctata . 



Black, very finely gray-haired, rather glisteniog, the forebody some- 

 times with feeble metallic lustre, antennae brownish, their base, the 

 mouth-parts and legs reddish yellow. 



■400- 



