(Pase 424) 

 ly transverse. Pronotum is narrower than elytra, longer than broad and 

 posteriorly hardly narrov.ed, with straight sides, the side? punctated 

 like the head, smooth at th? middle; elytra a little longer than pro- 

 notum, with rather robust and dense punctation; abdomen likewise rather 

 densely but more finely punctated, its first three free dorsal joints 

 at base narrov-ly transversally grooved depressed, transversal ^l^ooves 

 smooth in bottom. L. 4-4.5 mm. 



In the O (see above) the abdominal sixth ventral Joint at tip feeb- 

 ly emer^inated. 



At the edjje of lakes, brooks and v.ater-holes, distributed in Europe; 



in this country it has heretofore only been found here and there on the 



islands, and mostly singly (Frederiksberg .Jarden, Soro, Nykobing F., 



Maribo, Odense); also found at Skaane and at Kristiania. 



2. B. procerulus iravh. 



(iravh. Mon. ?E ; Erichs. Kaf. Vk. Br. I, 47£; Jen. Spec. Staph. 511; 

 Kraatz Ins, D. II, 624; Thoms. Skand, Col. II, 169; Uuls. et Rey Brevip. 

 1377, 442; CJanglb. Kaf. M. II, 465). 



Much like preceding species, from which It differs in that the anten- 

 nae are pitch-brown, and only reddish-yellow at base, that the legs are 

 darker, brownish-yellow. The head (Fig. 120) as lon,^ as broad, prono- 

 tum posteriorly feebly narrowed, antennal next-last joints less strong- 

 ly transverse, and that the abdominal first three free dorsal joints 

 are punctate at base and in the transversal grooves. L. 3.5-4.5 mm. 



Very rare; at water-edges (Brede at Copenhagen, Nyk/bing F., V. 

 Ulslev, Loll., Odense); like the preceding also in Skaane and at Kri- 

 stiania. Cistributed in Europe. - A variety, v. semipunctatus Fairm. 



-163- 



