520 TRANSACTIONS OP THE 



rounded at tip, not sinuated or dentated ; poststernum punctured 

 before, punctures profound and distant ; feet, posterior pairs 

 testaceous, anterior pair in the % furnished with a prominent 

 angle or obtuse spine near the tip of the anterior edge of the 

 thigh. 



The elytra appear emarginated at the tip of the suture when 

 at rest, in consequence of each of them having a rounded termi- 

 nation. This species must have hitherto been confounded 

 with the Americaiius with which it associates indiscriminately, 

 but is sufficiently distinct by the armature of the anterior femora 

 of the male and by the simply rotund termination of the elytra 

 in both sexes. 



3. G. ANALis. — Black, slightly bronzed ; elytra with punc- 

 tured strias; thorax with a transverse indented line. 



Length one-fifth of an inch. 



Body beneath impunctured and tinged with piceous ; front 

 between the eyes with two impressed dots ; labrum at tip and 

 palpi at base ciliated with white hairs ; mouth beneath piceous ; 

 labial palpi testaceous, blackish at tip ; thorax with a transverse 

 indented line rather before the middle not attaining to the lateral 

 margins, and a short oblique line on each side behind it curving 

 towards the lateral edge; scutel distinct, sub triangular [109] 

 elytra with about eleven distinct narrow striae of punctures, in- 

 terstitial lines depressed, each elytron very obtusely rounded at 

 tip ; poststernum impunctured ; feet rufous ; caudal segment 

 testaceous. 



Resembles G. natator, but that insect is lai'ger ; it corresponds 

 in size with the marinus Gyllenh., but the punctures of the 

 elytra are much smaller, and the termination of the elytra is 

 more obtusely rounded. 



4. Gr. LiMBATus. — Black ; elytra with punctured striae ; epi- 

 pleura yellowish. 



Length more than one-fifth of an inch. 



Front bipunctured ; thorax with an obsolete, transverse im- 

 pressed line before the middle and a short oblique line each side 

 behind the middle ; elytra striate with small punctures, intersti- 

 tial lines depressed, each elytron obtusely rounded at tip, beneath 



[Vol. II. 



