of Hemiptera Heteroptera from Japan. 451 



Thorax. — Pronotum longer than broad, narrower in front 

 than behind, sides concave, rounded in front ; anterior margin 

 behind each eye with a tubercle ; on each side of the centre a 

 longitudinal curved ridge, roughly granulated ; sides in front 

 and posteriorly from the transverse channel coarsely granulated. 

 Scutellum with a granulated keel on each side next the base, 

 and a central keel extending from the apex to the termination 

 of the side keels. Wings milky white, principal nerves yellow. 

 Legs fuscous brown. 



Abdomen above orange-red, with a broad black streak down 

 the centre ; apex thickly clothed with greyish hairs ; anal 

 appendages yellowish towards the apex. 



Length of body 13, appendages 15 lines. 



Genus Ranatra, Fab. 



Si 



Ranatra palhdenotata. .\.& 



Male brownish yellow ; posterior portion of the pronotum 

 finely punctured. Elytra, with several small, almost round, 

 pale spots. Anterior thighs beyond the middle with a large 

 triangular tooth, and before the apex with a small one. Anal 

 appendages longer than the body. 



Head. — Crown with a transverse channel a little in front of 

 the posterior margin of the eyes. Eyes black, shining. 



Thorax. — Pronotum brownish yellow ; posterior portion 

 finely punctured ; callus of the hinder angles dark brown or 

 piceous. Elytra more or less inclined to brown next the base : 

 claws pale brownish yellow; inner marginal nerve testaceous ; 

 central nerve brownish, with several oblong spots or short 

 streaks ; disk at the base, between the central nerve and 

 claval suture, with a long, brown, somewhat triangular dash : 

 corium brown, near the apex of the clavus pale brownish 

 yellow ; first exterior nerve testaceous or brownish yellow ; 

 disk with several pale yellowish-white spots of unequal size 

 and irregularly disposed. Membrane pale yellowish white, 

 nerves brown. Sternum brownish yellow. Legs brownish 

 yellow : tibue, second and third pairs at the base and apex 

 narrowly pitchy brown : tarsi brownish yellow ; second and 

 third pairs at the apex pitchy brown : daws brown. 



Abdomen above black, dull, and with a mouldy appearance 

 in certain lights ; margins next the connexivum brownish ; 

 eonnexivum brownish yellow ; beneath testaceous or brownish 

 yellow ; anal appendages reddish at the base, towards the apex 

 testaceous. 



Female similar to the male, but with darker elytra. 



