I.eConte.] 



cossoxixr. 337 



1. G. lutosus, n. sp. 



Dull pitchy black, without lustre, and clothed with a thin crust of dark 

 color. Head and beak very coarsel}^ rugosely punctured. Prothorax 

 coarsely granulate' each granule with a central puncture; disc with two 

 broad shallow grooves, or rather with three fine but not prominent carinae. 

 ElytrJt with shallow cribrate grooves, interspaces narrow, carinate, alter- 

 nately a little more elevated. Benea'h very coarsely punctured; antennae 

 testaceous. Length 2.5 mm. ; .10 inch. 



Haulover, Florida, March 16th; Messrs. Hubbard and Schwarz. A very 

 singular insect, of which I hope more specimens may be obtained than the 

 single one I have examined. 

 -'• "^ ^ Tribe II. C'OSSOXINI. 



I would associate as a distinct tribe certain other genera, which have not 

 the body covered with a crust, but shining and bare; some of the foi'eign 

 genera. are more or less setose, but ours are glabrous. 



The beak is never very short, and is frequently dilated at tip; the anten- 

 nae are inserted near the tip, or at the middle; the antennal grooves fre- 

 quently descend rapidly on the sides of the beak, and sometimes are di- 

 rectetl towards the eyes, but the antennae are not received in repose in a 

 deep transverse gular groove as in the next tribe. The club varies in form, 

 and in our genera the funicle is 7-jointed; whether any of the genera of 

 other countries, with less number of joints in the funicle, belong to the 

 tribe as here constituted, must be determined bj^ subsequent investigations. 



The arrangement here proposed differs radically from that offered by Mr. 

 WoUaston, and, if found in accordance witli natural affinities, will result in 

 a great reduction of the number of genei'a. 



The genera I recognize in our fauna are as follows: 

 Bodj' not depressed, beak not dilated at tip.. 2. 



Body very depressed, beak not dilated at tip. HOMALOXENUS. 



Bod}"^ depressed, beak dilated at tip; antennae 



inserted near the tip, grooves descending 



rapidly COSSONUS. 



2. Antennae inserted near the middle of the 



beak 3. 



Antennae inserted near the tip of the beak; 



funicle stout, club moderately small. . . MAORORHYNOOLUS. 

 Antennae inserted near the base of the beak, 



body very narrow M ACRANC YLUS . 



3. Antennal grooves descending obliquely, 4. 



" " directed towards the 

 ej-es ALLOMIMUS 



4. Body pale, very elongate; funicle slender, 



club large STENOMIMUS. 



Body black, less elongate; funicle gradu- 

 ally stouter, club large CAULOPHILUS. 



Body black, less elongate, funicle very 



stout, club small MESITES. 



PUOC. AMEU. ruiLOs. soc. XV. 90. 2q 





