SYSTENA. 331 



Head entirely impunctate ; antennae slender, half the length of the body, the four basal joints testaceous, the 

 rest black, the fourth joint slightly longer than the third ; thorax about one half broader than long, the 

 basilar groove obsolete, surface extremely finely punctured when seen under a strong lens ; scutellum 

 testaceous, with a piceous spot ; elytra more distinctly punctured than the thorax, pale testaceous, sub- 

 opaque, the suture and a sublateral very narrow stripe black ; the former slightly widened behind the 

 middle, and both abbreviated before the apex ; between the two stripes a small spot is placed near the 

 scutellum ; underside and legs, with the exception of the outer side of the tibiae and a small spot at the 

 apex of the posterior femora, testaceous. 



Hab. Mexico, Jalapa (H'oge). 

 One specimen only was obtained. 



21. Systena s-littera. 



Crioceris s-littera, Linn. Syst. Nat. ed. x. p. 373 (1758) x ; Fabr. Syst. El. i. p. 464 (1801) 2 . 



Chrysomela s-littera, Degeer, Mem. v. p. 357, t. 16. fig. 21 3 . 



Galeruca s-littera, Fabr. Ent. Syst. i. 2, p. 35 (1792) 4 . 



Altica s-littera, Oliv. Ent. vi. p. 701, t. 4. fig. 60 (1808) 6 ; Illig. Mag. vi. p. 148. 



Systena sinuato-vittata, Clark, Journ. of Ent. ii. p. 403 (1865) e . 



Systena s-littera, Harold, Coleopt. Hefte, xiv. p. 30 7 . 



Hab. Mexico, Tuxtla, Teapa, Cordova (coll. Salle); Guatemala, near the city 

 (Champion) ; Nicaragua, Chontales (Janson) ; Panama, Volcan de Chiriqui, Bugaba 

 (Champion).— South Ameeica * 2 3 4 5 , Venezuela 6 , Colombia 7 . 



This is apparently a common and widely distributed species, and comparatively 

 easily recognized by the sinuate s-shaped pale vitta of the elytra. The species has 

 been fully described and figured by the above-named authors, but has not hitherto 

 been recorded from Central America. 



22. Systena discicollis. (Tab. XX. fig. 5.) 



Systena discicollis, Clark, Journ. of Entom. ii. p. 403 (1865) \ 

 Hab. Mexico \ Guanajuato (coll. Salle). 



Whether this species, the type of which is contained in the British Museum, is 

 really distinct or but a variety of the many nearly similarly-coloured allied forms, it is 

 impossible to say, as only a single specimen served the author for his type. An exami- 

 nation of the latter by myself proves the thorax to be impunctate as Clark describes it; 

 but the elytra are finely punctured and not impunctate, as stated in the description. 

 Amongst the numerous specimens of Systena before me from Central America only one 

 agrees sufficiently well with the type to justify its being considered identical. I may 

 further add to Clark's description that the yellow elytral stripe is perfectly straight. 



23. Systena pectoralis. 



Systena pectoralis, Clark, Journ. of Entom. ii. p. 403 (1865) \ 

 Hab Mexico 1 , Cordova, Oaxaca, Tepansacualco, Juquila (coll. Salle); British 



2u2 



