SYSTENA. 323 



Head extremely finely punctured, the frontal tubercles distinct and elongate; antennae rather variable in 

 colour, fulvous or piceous, slender, the fourth joint slightly longer than the third ; thorax transversely 

 subquadrate, fulvous, the basilar sulcation almost obsolete or indicated at the sides only, surface finely 

 punctured ; scutellum fulvous ; elytra slightly widened behind and rather flattened, the space behind the 

 base transversely depressed, entire surface extremely closely punctured, metallic dark blue or green, the 

 lateral margins rufous or testaceous ; entire underside and legs of the same colour. 



Hab. Mexico, Cordova, Toxpam (coll. Salle); Guatemala, Aceytuno 5100 feet 

 (Salvin), Zapote, Senahu in Vera Paz (Champion). 



The colour of the elytra in this species varies, as remarked above, from blue to 

 green, and that of the underside from flavous to fulvous. 



2. Systena mexicana. (Prasona meodcana, Tab. XVII. fig. 20.) 



Underside, legs, and antennas black; head and thorax fulvous; elytra metallic green or blue, closely 



punctured. 

 Length 3| lines. 



Hab. Mexico, Cordova, Toxpam (eoll. Salle) ; Guatemala, San Geronimo, Senahu 

 in Vera Paz (Champion). 



It is quite possible that this species is but a variety of S, marginata, as the difference 

 between the two insects is one of colour only. I have, however, of both forms sumcien-t 

 specimens, and no intermediate degree, so that I am obliged to consider them distinct. 

 In the present insect the want of the fulvous elytral margin and the colour of the 

 underside will separate it from the preceding species. S. mexicana bears the name of 

 Cacoscelis nigriventris, Chevrol., in the collection of M. Salle. 



3. Systena oberthuri. (Tab. XIX. fig. 15.) 



Systena oberthuri, Baly, Annals & Mag. of Nat. Hist. ser. 5, ii. p. 229 \ 

 Hab. Panama, Matachin (Thieme) \ Taboga Island (Champion). 



The only specimen obtained by Mr. Champion is larger than the type in Mr. Baly's 

 collection, which is figured here. The piceous markings of the elytra are much more 

 distinct and darker ; in all other respects the specimen agrees with the type. 



4. Systena variabilis. (Tab. XIX. figg. 16-21.) 



Pale fulvous below ; above reddish fulvous ; elytra very finely and closely punctured, a transverse band at the 



base, and another, slightly curved below the middle, black. 

 Var. a. Elytra with a small black spot at the shoulder, another below the base, and two placed transversely 



below the middle. 

 Yar. b. Elytra, legs, and underside black ; thorax fulvous* 

 Yar. c. Entirely black. 

 Yar. d. Entirely testaceous. 

 Length 2-3 lines. 



Hab. Mexico, Jalapa (Hoge), Tuxtla, Cordova, Panistlahuca, La Parada, Juquila, 

 Guanajuato, Cuernavaca, Toxpam (coll. Salle) ; Guatemala, Aceytuno 5000 feet (Salvin), 



2t2 



