430 SEEEICOENIA. 



b\ Antennae pitchy-black ; prothorax subparallel behind nigricomis. 



d'". Elytra with rows of coarse punctures placed in shallow striae, the 

 interstices flat; the head and prothorax densely punctured, the 

 larger punctures coarse and closely placed on the anterior part or 

 the thorax, as well as on the head ; prothorax rounded at the sides . brunneus. 

 f". The prothoracic punctuation uniform, fine; the elytra oval or suboval. 

 c\ Body winged, rufo-testaceous or reddish-brown, the elytra maculate. 

 c 5 . Elytra with a transverse dark median fascia, the interstices 



convex • jasciatus. 



d 5 . Elytra with a common discoidal black patch, the interstices flat 



towards the suture discoideus. 



d\ Body apterous, brown ; elytra short, without definite markings, the 



interstices convex apterus. 



d. Claws simple ; prothorax bi-incised on either side at the base, the punctua- 

 tion mixed; scutellum concave; frontal carina prominent; antennae 

 slender zunilensis. 



1. Horistonotus exoletus. 



Cardiophorus exoletus, Erichs. in Germans Zeitschr. fur Ent. ii. p. 325 '. 



Horistonotus exoletus, Cand. Monogr. Elat. iii. p. 257 2 ; Horn, Trans. Am. Ent. Soc. xii. p. 39 3 . 



Cardiophorus fervidus, Chevr. Dej. Cat. 3rd edit. p. 104 4 . 



Hab. North America, S.W.Texas 3 . — Mexico 4 (coll. Janson), Playa Vicente, Jalapa, 

 Tapachula (Hoge), Teapa in Tabasco (Pilate, Edge, H. II. &'?nith) ; British Honduras, 

 Rio Hondo (Blancaneaux) ; Guatemala, Panzos, Teleman, Senahu, Chacoj, Cahabon, 

 and San Geronimo in Vera Paz, Rio Naranjo, Pantaleon (Champion) ; Panama, Bugaba, 

 Volcan de Chiriqui (Champion). — Colombia 12 ; Venezuela; Brazil; Peru 2 . 



This is the commonest species of the genus within our limits. It varies in colour 

 from rufo-testaceous to piceous or pitchy-black. The elytral interstices are convex 

 throughout, the second, third, fifth, seventh, and ninth being strongly costate before 

 the apex. One of the two specimens from San Geronimo, a male, is more elongate 

 than usual, and almost black. A male (amongst a large series) from Teapa is also 

 unusually elongate, and has the elytra very coarsely and deeply punctate-striate. The 

 four ( 2 ) specimens from Teleman have the alternate elytral interstices only moderately 

 raised before the apex. All these appear to be nothing more than extreme forms of a 

 widely distributed species. 



2. Horistonotus pedestris. 



Horistonotus pedestris, Cand. Elat. Nouv. iii. p. 84 (1881) \ 

 Hab. Guatemala 1 , Capetillo, Cerro Zunil (Champion). 



We possess three male examples of this species, the type ( d ) of which has been 

 communicated by Dr. Candeze. It is closely allied to H. exoletus, but has the thorax 



