120 Mr. A. Murray on Coleoptera from Old Calabar. 



square; apex broadly emarginate, approaching to truncate 

 sides only slightly rellcxed : deeply punctate-striatc ; interstices 

 convex and irapunctate ; two impressions on the third interstice, 

 one on the exterior side of it about one-fifth from the base, and 

 another on the interior side of it about one-third from the apex ; 

 marginal space narrow, increasing in breadth till it reaches the 

 apical emargination, where it is broad, and bears pitted impres- 

 sions. Under side piceous, polished and shining, rugosely 

 punctate on the mesosternal and metasternal parapleurse; the 

 prosternal parapleurse with very faint traces of punctures. Legs 

 pale testaceous ; knees slightly darker. 



3. A. patroboides J mihi. 



Prsecedenti affinis ; niger, thorace interdum subvirescente ; tho- 

 race subcordato, convexo; elytris punctato-striatis ; pedibus 

 testaceis. 

 Long. 5^ lin., lat. 2J lin. 



Allied to the preceding, but smaller, and not so broad nor so 

 depressed. Black ; sometimes with a tinge of virescence in cer- 

 tain lights on the thorax. Head smooth, shining, and impunc- 

 tate, with a deep fovea on each side in front, and an exterior 

 narrow groove between it and the base of the antennae ; labrum 

 quadrate, smaller than in the preceding species ; mandibles and 

 other parts of the mouth and base of the antennse ferruginous ; 

 remainder of antennse fuscous. Thorax subcordate, widest at 

 the middle, with a slight tendency to the hexagonal form of 

 that of A, planaticollisy but with a deeper and narrower re- 

 flexed margin; anterior margin emarginate; base truncate, 

 oblique towards the angles, which are obtuse; the reflexed 

 margin is narrow in front and widest at the base, and it, as well 

 as the base, is rather finely rugose or rugoso-punctate : the disk 

 is convex, reminding one of the thorax in Patrobus, impunctate ; 

 the dorsal line and arched line in front are well marked, the 

 former reaching from the anterior margin to the base. Scutel- 

 lum impunctate, almost smooth. Elytra as in ^. planaticollis, 

 except that the strise are not so deep, the punctures in them less 

 distinct, and the interstices less convex. Under side smooth and 

 impunctate, with the exception of some faint traces of impres- 

 sions on the parapleurse or at the sides of the basal segments of 

 the abdomen. Legs testaceous. 



Colymbetidae. 



Agabus, Leach. 



1. A. hydroporoides, mihi. 



Elongatus, oblongo-ovalis, parum depressus, nitidus, impuncta- 



