106 DESCRIPTION OP INSECTS 



palpi, but differs in having those parts entire. It also has 

 some relation to Haliplus by the scales which conceal the 

 origin of the posterior feet. The proper situation of this 

 new genus is between those two genera, but it is unquestion- 

 ably much more closely allied to the former. 



Genus Haliplus. Latr. 



Antennse ten-jointed ; palpi subulate ; scutel none ; tarsi fili- 

 form, five-jointed, posterior thighs concealed at base by a 

 clypeiform scale ; body oval, thick. 



Species. 



1. H. * i2-punctahis yellowish; thorax with two black spots 



at base ; elytra punctured and spotted with black. 

 Length five-fortieths of an inch. 



Bytisms maculaliis. Melsh. Catal. 



Body pale yellowish, with numerous dilated punctures, 



rounded behind. 

 Head immaculate. 



Thorax, a distinct black spot each side at base. 

 Elytra pale, with profoundly punctured strife, punctures di- 

 lated, black, each elytron with six black dots placed l, 2, 

 1, 3, the anterior one before the middle, the two succeed- 

 ing ones on the middle- 



The Dytiscus maculatus of Fabriciusis altogether different 

 from this species; it is a Colymbetes. I have, however, 

 thought proper to reject the name maculatus as applied to 

 this insect, lest it should be confounded witli the Fabrician 

 insect by those who adhere to his system or to that of 

 Linne. 



S. H. Hriopsis pale yellowish ; thorax with a black spot be- 

 fore ; elytra whitish spotted with black- 

 Length nearly three-twentietlis of an inch. 

 Body pale yellowish, numerous dilated punctures. 



