134 MANDIBULATA. — COLEOPTERA. 



Closely allied to the foregoing, and different in form from Hydrop. globulus 

 of Paykul hereafter described. Subovate, glossy pitchy-black, very faintly 

 punctulated throughout : the margins of the thorax narrowly pale : elytra with 

 a single stria on each towards the suture, the lateral margins pale testaceous : 

 body beneath and legs pitchy-black. 



Very abundant, not only throughout the metropolitan district, 

 but in other places ; in Norfolk, Suffolk, Devonshire, &c. " Botti- 

 sham. 1 ' — Rev. L. Jenyns. 



Sp. 20. ochraceus. Suhovatus, niger, thoracis lateribus pallidis, elytris ochraceis 

 immaculatis, stria suturali unicd. (Long. corp. 1 — 1^ lin.) 



Hy. ochraceus mihi. — Steph. Catal. p. 61. No. 621. 



Allied to the last, but smaller, of a different colour and more deeply punctured : 

 head immaculate black, finely punctured: thorax black, with the lateral 

 margins pale yellowish, the disc finely punctulated : elytra very pale imma- 

 culate ochraceous, rather deeply punctured throughout, with a deep sutural 

 stria on each : body beneath and legs pale griseous. 



It is possible that this may be only an immature state of the foregoing, but the 

 impressed dots seem larger and deeper. 



Taken near London, and in the New Forest, Hants. 



Sp. 21 . lutescens. Subovatus, nigro-piceus, thoracis angulis anticis elytrorumque 



marginibus pallide lutescentihus. (Long. corp. 1 — 1^ lin.) 

 Hy. lutescens mihi.— Steph. Catal. p. 61. No. 622. 



Of a deeper colour, but of similar form to the preceding ; above glossy piceous ; the 

 head black, immaculate: the thorax with the anterior angles alone pale 

 lutescent : elytra obscurely punctured ; with a faint stria near the suture, the 

 lateral margins lutescent : body beneath and legs piceous. 



Var. /j. Hy. sordens. Steph. Catal. p. 61. No. 624. With the head black, the 

 lateral margins of the thorax and elytra fulvous. 



Found near London, and in Suffolk ; " near Barham."— Rev. 

 W. Kirby. 



Sp. 22. foveolatus. Niger, thorace postics Jbveolato, elytris strid unicd im- 



pressd. (Long. corp. f — 1 lin.) 

 Hy. foveolatus. Haworth.— Steph. Catal. p. 61. No. 623. 



Smaller than the foregoing : glossy black : head immaculate : thorax with the 

 lateral margins pale, with several minute foveolae on the disc, sometimes con- 

 fluent : elytra pitchy-black, very finely punctulated, with a slight stria on 

 each near the suture : legs dull ferruginous. 



Taken from April to June in ponds near London ; " on Hamp- 

 stead-heath," &c. — Mr. Ingpen. 



