668 Coleopterological Notices, VII. 



The few species assigned to Piazurus by LeConte do not be- 

 long to the Piazurides of Lacordaire at all, but to the Lechri- 

 opides, the mesosternal canal being closed behind and not open 

 in the form of a gutter, as it is in the much larger and broadly 

 rhomboidal Piazurus ; that genus differs moreover in its elongate 

 third joint of the antennal funicle and very strongly toothed 

 femora. The genus Gelus, which I have proposed above for 

 oculatus and calif ornicus, is very closely allied to Lechriops, as 

 shown by a Brazilian representative of the latter before me, but 

 differs in having the abdominal sutures two to four strongly I'e- 

 flexed at the sides, only the second being affected in Lechriops 

 in its much shorter and stouter legs and in its non-contiguous 

 eyes. The Piazurus subfasciatus of LeConte, should be reexam- 

 ined with a view to determining more fully its generic aflSnities ; 

 it may possibly prove to be non-associable with oculatus, and is 

 not represented in my cabinet at present. 



The multitudinous small and minute Brazilian species will form 

 numerous genera, and the eleven now before me seem to show 

 that it will be impossible to maintain the groups laid down by 

 Lacordaire. There are several distinct genera at present confused 

 under the name Copturus, intimated indeed by that author. 



GYROTUS n. geu. 



The single representative of this genus differs considerably in 

 facies from those of Copturodes, because of the coarse punctures 

 of the elytral striae, widely separated eyes and acutely prominent 

 post-ocular processes of the prothorax ; it mg-y be described as 

 follows : — 



G. munitus n. sp. — Cylindric-oval, convex and moderately stout, black 

 throughout, the tibise, beak and antennae ruf escent ; body clothed throughout 

 with a dense crust of large, rounded and non-strigose scales, whitish toward the 

 sides of the prothorax, more narrowly toward base, on the entire under surface 

 and in a few widely scattered, somewhat elevated or thickened clusters on the 

 elytra, also in a large spot at the middle of the elytral flanks; elsewhere dark 

 grayish in color. Head well developed, the eyes finely faceted, rather large, 

 separated on the front above by their own width and by much more below, the 

 inner margins feebly arcuate and strongly divergent downward throughout, the 

 interocular surface with a large deep central fovea; beak stout, squamose at 

 base, glabrous and coarsely punctato-rugose thence to the apex, the latter mod- 

 erately dilated; antennae moderately slender, inserted behind the middle, the 

 four basal joints of the funicle decreasing uniformly and rather rapidly in 



