lOG IlYDUADEl'lIAGA — DYTISCIDAE. 



Elongate oval, sinning. Head large, black-brown behind, 

 liohter in front; antennae yellow, apex of last joints 

 darker; elytra l)rownish, sides, base, and reiicxed margin 

 brown-yellow ; legs yellow-brown ; punctuation fine. 

 L. 2 — 2| 1. Scarce. H. ohlongus, Stepli. 



h 2. Elytra parallel-sided for three- 

 quarters of the length. 

 Oblong oval, shining. Head large, pitch-brown, front 

 and posterior margin dark red; antennae bright red, last 

 joints scarcely darker at apex ; elytra black, apex or entire 

 side margin reddish ; legs red. Punctuation fine, each 

 elytron with two rows of larger punctures. L. 2 1. Kather 

 common. H. mcmnonius, Nic. 



M 2. Thorax reddish, with a brown 

 patch in middle. 

 Allied to ir. fcrruginms, but narrower, with less varie- 

 oated elytra, which are more sparingly and more distinctly 

 punctured. Disc of thorax smooth. L. 2 1. Eare. 



H. ohsoletus, Aub. 



h I. Disc of thorax distinctly punctured. 



A 2. Punctuation scattered. 



a 2. Elytra with three rows of 

 larger impressions. 



01)long oval, ihit, moderately shining. Head red-yellow, 



with a ilarlv spot between eyes; thorax reddish-yellow, 



with a dark shade on disc; elytra brown, with a broad 



irregular yellow transverse band at base and some lighter 



places at apex. Punctuation rather strong. _ L. 2 1. ^ Not 



common. ^- ferrugineus, Steph. 



h 2, Elytra without any rows of 



larger impressions. 



Allied to 7/. 'mcniiwmusMxK. rather smaller and strongly 



punctured. Pitchy ; iVont of head, sides of thorax and 



elytra reddisli. l! \\ 1. Connnon. 



H. GylUnhali, Schiodt. 



I> 2, Punctuation close. 



(t 2. Elytra strongly or rather 

 strongly punctured. 

 A 'i. Pubescence scanty ; length 

 '2h lines. 



