(Page 468) 

 Fig. 141. Paederus rl partus Linn. 



Key to Subgenera and Species. 



1. Abdomen unicolorous black, or bluish-black. 1. Subg. Paederidus 



Muls. - The second joint of maxillary palpi reddish- or brown- 

 ish-yellow. L. 8-9 mm 1. P. ruficollis Fabr. 



Abdomen bicolored: reddish-yellow with black tip. 2. Subg. Paederus 



s. str. Muls 2. 



E 



2. Blytra much longer than pronotum, and considerably broader than 



same. L. 7 mm 2. P. fuscipes Curt. 



Elytra only a little longer and broader than pronotum 3. 



3. Pronotum longer than its breadth anteriorly, its sides not margis- 



ated. L. 7-8 mm 3. P» riparius Linn. 



Pronotum as broad as long, its sides very finely, yet distinctly 



marginated. L. 8-9 mm 4. P. litoralis jravh. 



1. Subgenus Paederidus Muls. et Rey. 



1. P. ruficollis Fabr. 



(Fabr. Spec. Ins. I, 339; Brichs. Jen. Spec. Staph. 602; Kraatz Ins. 

 D. II, 731; Thorns. Skand. Col. II, 197; Muls. et Rey Bre'vip. 1878, 246; 

 Janglb. Kaf. II, 536). 



In relation to the following species easily identified by the color 

 alone. 



Black or bluieh-black, somewhat glistening; elytra and abdomen rath- 

 er finely grayhaired; head and elytra often steel-blue; pronotum red; 

 antennal first two joints on ventral side, and maxillary palpal second 

 joint reddish or brownish-yellow. 



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