s 



264 SERRICOENIA. 



Body clothed with narrow acuminate scales. 



Propleurse more or less distinctly grooved for the reception of the ante- 

 rior tarsi. 



Hind angles of the prothorax subrectangular curtus. 



Hind angles of the prothorax obliquely truncate. 

 Form more or less elongate. 



Propleural grooves shallow; fifth ventral segment with a large 



smooth space in $ tuspanensis, 



Propleural grooves deeper; fifth ventral segment with a small 



smooth space in <$ suillus. 



Form short, broad brevis. 



Propleurse not grooved for the reception of the anterior tarsi. 



Hind angles of the prothorax rectangular truquii. 



Hind angles of the prothorax more or less prominent, obliquely 

 truncate. 

 Prothorax moderately convex ; elytral interstices coarsely punctured . lezeleuci. 

 Prothorax transversely gibbous ; elytral interstices more finely punc- 

 tured scarrosus. 



Hind angles of. the prothorax prominent, almost rounded; head with a 



Y-shaped ridge calamitosus. 



Body clothed with long hair-like acuminate scales ; propleurse not grooved. 

 Elytra with distinct rows of punctures towards the sides ; punctuation 



moderately coarse aristatus. 



Elytra without distinct rows of punctures towards the sides ; punctuation 



very coarse paleatus. 



1. Lacon curtus. 



Adelocera curia, Lee. Trans. Am. Phil. Soc. x. p. 491 \ 



Lacon curtus, Cand. Monogr. Elat. i. p. 156 2 ; Revis. Elat. p. 100 3 . 



Hal. North America, Georgia x 2 , Texas 2 . — Mexico 2 3 (coll. Janson, ex Laferte), 

 Chihuahua city (Hoge). 



Five examples of this species have been received from Herr Hoge, and there are two 

 others labelled as from Mexico in the Laferte collection. L. curtus is very closely 

 allied to L. reetangularis, Say, and apparently only differs from it in having the elytra 

 more coarsely striate-punctate, the punctures nearly or quite as wide as the interstices. 

 The male has a small oval space in the middle of the fifth ventral segment almost 

 devoid of coarse punctures. 



2. Lacon tuspanensis. 



Lacon tuspanensis, Cand. Monogr. Elat. i. p. 157 ' ; Revis. Elat. p. 101 2 . 



Hal. Mexico 1 2 , Orizaba (coll. Janson), Playa Vicente, Cordova (Salle), Jalapa 

 (Hoge); Guatemala, Zapote (Champion). 



