514 TRANSACTIONS OF THE 



LACCOPHILUS Leach. 

 Antennse setaceous, longer than the head ; scutel none ; anterior 

 tarsal joints of the male not patelliform ; palpi filiform. 



1. L. MACULOSUS. — Yellowish-testaceous ; elytra blackish, lin- 

 eated and spotted with white. [101] 



Length one-fourth of an inch. 



Dytiscus maculosus Melsli.'_Catal. 



Body yellowish-testaceous, glabrous ; elytra blackish, three 

 spots or dilated lines at base, of which one is humeral and one 

 subsutural, each emarginate at tip and profoundly so on the inner 

 side, and the third rather shorter, arising from the middle of the 

 base, two marginal spots of which the anterior one is much the 

 largest, a common irregular spot behind the middle, and an 

 apical common band, white, tip obliquely truncate. 



Var. a. Trunk beneath black. 



Var. P. Yellowish-testaceous ; elytra with a common black 

 band behind the middle. 



Rather a common insect. The last variety is a remarkable 

 one ; but, when closely examined, traces of some of the spots are 

 perceptible upon it. 



2. L. PROXiMUS. — Yellowish-testaceous ; elytra blackish, ob- 

 soletely spotted with dull whitish. 



Length three-twentieths of an inch. 



Body yellowish-testaceous, paler beneath ; elytra with spots as 

 in the preceding species, but obsolete, the larger marginal one 

 distinct. 



This species I found very numerous in the fresh water marshes 

 of South Carolina. I do not hesitate to give it as distinct from 

 the preceding, although so closely allied to it by the elytral 

 maculae. It is readily distinguishable by its inferior size. 



[Afterwards described as L./asciatus Aube. — Leg.] 



HYDROPORUS Clairville. 

 The four anterior tarsi apparently four-jointed, the fourth 

 joint minute, and with the base of the fifth concealed in a pro- 

 found fissure of the third joint; body oval, the breadth greater 

 than the height ; scutel none. [ 102 ] 



[Vol. IT. 



