100 ITYDlIADErilAd.V — PYTISCTDAE. 



Jlf/jiht/dras. 



Eust-red, elytra darker, male shining, female dull. 

 L. 2h 1. Coumion. H. ovatus, Lin. 



O.riinoptnus. 



Head and tlioiax brown-red; elytra brown, with the outer 

 margin and two transverse bands (interrupted at suture) 

 red-yellow. Male more shiny than i'emale ; under-side and 

 legs dark red-yellow. L. li 1. I'ortsea. 



0. ciispidatus, Kunze. 



Hydrojmvus. 



A. Forehead bordered in front. 



Eeflexed margin of elytra with a bordered cavity under 

 shoulder for reception of apex of intermediate femora. 

 S])ecies short, convex, and Ijare. 



a. Body short oval ; thorax red-yellow, generally darker 

 in front and behind. 



I, Elytra very finely and closely punctured, with scat- 

 tered strong punctures. 



Eust-yellow, elytra with the base, suture, three unecpial, 

 often coidluent longitudinal lines and a spot near middle of 

 third line black, the first line not reaching base, second 

 short, placed behind, third reaching the base, interru])tcd 

 liehiud. L. li 1. Common. H. reticulatus, Fab. 



II. Elytra coarsely and rather closely punctured, 

 with intermediate isolated smaller punctures. 



Closely allied to H. reticulakts but having longitudinal 

 markings on elytra narrower, more regular, uninterrupted 

 and continued to base parallel wdth sutural marking; 

 punctuation also more uniform and coarser. L. 1| 1. Rare. 



H. quinquelineatus, Zett. 



JIJ. VAytnx very closely and coarsely punctured. 



Head red-yellow ; elytra black, with a broad side border, 

 dilated in two places and a transverse band (not reaching 

 the suture) near base red-yellow, often also with a yellow 

 longitudinal line along the disc. L. 1 h 1. Common. 



Jf. inaeqnalis, Fab. 



