THE ENTOMOLOGIST. 



33. Omalium riparium of Thomson to be added. See Zool. 

 8416. 



34. Omalium rugulipenne (a new species) to be added. 

 " This species has the general form, appearance and size of 

 O. rivulare, but differs from that insect in having the antennae 

 shorter and entirely pale, the elytra longer and densely rugu- 

 lose, the neck alutaceous, and with very few and indistinct 

 punctures, and the thorax with the region of the posterior 

 angles likewise alutaceous, with scarcely any trace of punc- 

 tures, whereas in O. rivulare the neck and region of the pos- 

 terior angles of the thorax are glossy and strongly punc- 

 tured. In most of these distinctive characters this species 

 approaches O. riparium, from which, however, its shorter an- 

 tennte and rugosely-punctured elytra will serve to distinguish 

 it ; and although O. caesum and O. AUardi come somewhat 

 nearer to it in this latter respect, their elytra are compara- 

 tively too short, with the punctures too gentle and not suffi- 

 ciently confluent." — P. 60. Named from a single specimen 

 taken near London, and in Mr. Rye's cabinet. 



35. Omalium testaceum of Erichson to be added. See 

 Zool. 8650. 



36. Omalium brevicorne of Erichson to be added. See 

 Zool. 8650. 



37. Omalium crassicorne pf Matthews to be added. See 

 Zool. 8650. 



38. Omalium nigrum of Gravenhorst 'to be added. See 

 Zool. 8650. 



39. Hydnobius strigosus of Schmidt. This species was 

 included in Mr. Waterhouse's ' Pocket CataloguQt of British 

 Coleoptera,' dated 1861 : it has been described by Schmidt, 

 Erichson and Thomson. It has been taken by sweeping at 

 Hammersmith, and is in the collection of Dr. Power. 



40. tielophorus dorsalis of Mulsant to be added. See 

 Zool. 8610. 



41. Helophorus asneipennis of Thomson to be added. See 

 ZooL 8611. 



42. Helophorus arvernicus of Mulsant to be added. See 

 Zool. 8611. 



43. Philhydrus maritimus of Thomson to be added. Of 

 this species Mr, Rye says : — " 1 have taken this species in 

 brackish water at Gravesend, It is very like P. testaceus, 



