266 SERKICORNIA. 



disc not transversely gibbous), and by the more coarsely punctured elytral interstices. 

 The male has a small, almost smooth, oval space in the centre of the fifth ventral segment. 

 In one of the two specimens from San Geronimo the hind angles of the thorax are 

 much less prominent than usual, the sides of the thorax being almost parallel behind. 



7. Lacon scarrosus. 



Lacon scarrosus, Cand. Monogr. Elat. i. p. 157 1 -, Revis. Elat. p. 100 2 . 



Hab. Mexico l 2 , Panistlahuaca (Salle), Teapa (Edge) ; Beitish Hondueas (coll. 

 Janson); Guatemala 2 (coll. Janson), San Juan and Chacoj in Vera Paz, Duefias, 

 Capetillo, Zapote (Champion) ; Nicaeagua, Chontales (Belt) ; Costa Rica (coll. Janson), 

 Irazu (Rogers). 



This species, like L. tuspanensis, &c, has the thorax transversely gibbous about the 

 middle, and deeply canaliculate and foveate behind. The punctures of the elytral 

 interstices are much finer than those of the striee, becoming still finer towards the apex. 

 The male has a moderately large cordate or sub triangular smooth space on the fifth 

 ventral segment. 



8. Lacon calamitosus. 



Lacon calamitosus, Cand. Revis. Elat. p. 100 \ 



Hab. Mexico, Oaxaca \ Playa Vicente (Salle), Teapa in Tabasco (coll. Janson) ; 

 Guatemala, Capetillo (Rodriguez). 



I have only seen three examples of this species. It differs from L. lezeleuci and 

 L. scarrosus chiefly in the Y-shaped ridge upon the head, and in the more rounded 

 hind angles of the thorax. The male has a transverse sparsely punctured space in the 

 middle of the fifth ventral segment ; the apical margin of this segment is considerably 

 thickened in both sexes. The locality given by Candeze 1 is " Oaxaca," but the type 

 in the Salle collection is labelled Playa Vicente. 



9. Lacon aristatus. 



Elongate, pitchy-brown or piceous, the hind angles of the prothorax sometimes obscure testaceous, thickly 

 clothed with cinereous or flavo-cinereous piliform acuminate scales, some of which are semierect on the 

 elytra ; the oral organs, antennae, and legs obscure rufo-testaceous. Head coarsely, closely punctate, 

 broadly depressed in the middle in front. Prothorax a little broader than long, convex, transversely 

 gibbous about the middle, rather deeply canaliculate posteriorly and also longitudinally depressed on 

 either side midway between this and the margin ; the sides obliquely converging in front, rounded about 

 the middle, and moderately sinuate behind ; the anterior angles prominent ; the hind angles obliquely 

 truncate ; the surface closely, coarsely punctate. Scutellum coarsely punctured. Elytra elongate, as 

 wide as the prothorax at the base, narrowing from about the middle, moderately coarsely, closely, 

 confusedly punctate, with rows of coarser and deeper punctures towards the sides and apex. Beneath 

 coarsely, very closely punctate ; propleurse without distinct grooves for the reception of the anterior tarsi ; 

 the fifth ventral segment with a transverse fold at the apex. 



