(Page 228) 



In the S the impressions or grooves of the head mor^ distinct than 

 in the Q \ the sixth ventral joint of abdomen is a little elongate, some- 

 what narrowing and rounded off at tip. 



It varies in size, and color of the legs etc. A lar^e form with black 

 legs and bluish-black glistening forebody approaches the following species. 



Common on muddy edges of lakes, ponds and brooks, most often in com- 

 pany with Tachyusa atra . and like this lively and agile running around in 

 the sunshine. The blue-black variety is rare. 



137. H. ripicola Kiesw. 



(Kiesw. Stett. Ent. Ztg. V, 1844, 317; Kraatz Ins. D. II, 227; L^uls. 

 et Key Bre'vip. 1875, 370; (Janglb. Kaf, M. II, 242.- carbonaria Sharp Brit. 

 Hom. 114). 



Very closely allied to carbonaria , but somewhat larger and of more ro- 

 bust structure, most often distinctly black-blue or black with bluish 

 reflection; antennae and legs bluish-black, tarsi brownish-yellow. The 

 head os as broad as pronotum, in the ^at middle broadly and deeply, in 

 the o more feebly impressed. The antennae are longer and more slender, 

 and the legs likewise distinctly longer than in carbonaria ; the forebody 

 Is less finely, but much more densely punctated and less glistening than 



— (Page 229) — 

 In this. L. 3-3.5 mm. (t. Janglb. and Sharp). 



Distributed in J/lddle Europe and England on sandy liver-brlme, often 

 in company with Tachyusa leucopus Marsh ( chalybaea Er.), which it resemb- 

 les in color. It ie not Improbable that it also may occur in this country, 

 but is however not heretofore denoted with certainty. 



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