HYDROl'ORUS. 109 



cence. Female rather duller tliau male. L. l-?j — 1^ 1. 

 IMouiitaiu species. //. inonticola, Sharp. 



2? 1, Punctuation of elytra rather close 

 or close. 

 a 1, Thorax strongly margined. 



Black ; extreme side margins of thorax reddish ; first 

 two or three joints of antennae reddish, the rest more or 

 less pitchy ; legs red, posterior pair darker. ] )if1ering 

 from H. monticola in its narrower and more elongate form, 

 longer and darker antennae, and rows of larger punctures 

 on elytra : somewliat resembling H. atriccps Init more 

 parallel-sided, less distinctly punctured, with thorax 

 strongly margined. Elytra with two rows of larger punc- 

 tures. L. nearly If 1. A single specimen taken hy Dr. 

 Sharp at Ivannoch. H. longicornis, Sharp. 



h 1 . Thorax not strongly margined. 



Oblong oval, almost parallel-sided, pointed. Black, 

 shiny ; base of antennae and knees brown-red. Punctua- 

 tion fine and close ; pubescence scanty. L. 2 1. Eather 

 common. H. atriccjjs, Crotch. 



d d. Elytra red-brown. 



A a. Punctuation of elytra rather fine. 

 A 1. Body scarcely pubescent. 

 (1 1, Length li lines. 



Oblong. Head brown-red ; thorax black ; elytra red- 

 brown, darker on the disc, diffusely punctured. Sides of 

 thorax scarcely rounded, and forming an obtuse but dis- 

 tinct angle with those of elytra. Disc of thorax almost 

 impunctate, margins strongly punctured. Common. 



H. tristis, Payk. 



b 1, Length 1-^- lines. 



Similar to H. tristis, but rather narrower; sides of 

 thorax more rounded and forming a stronger angle witli 

 those of elytra ; antennae rather longer. Elytra diffusely 

 punctured. Not uncommon. JI. ncglectus, Schaum. 



H 1. Body with long thick pubescence, 

 especially on elytra. 



Elliptic, flatly arched. Head brown-red, darker ])etween 



