452 PHYTOPHAGA. 



tudinally costate ; legs flavous ; posterior tibiae with a double spur ; abdomen stained with fulvous ; the 

 posterior femora of the same colour as the elytra ; claws appendiculate. 



Hah. Nicaragua, Chontales (Belt). A single specimen. 



The subangulate sides of the thorax are not to be found in the other species which 

 constitute this genus; but, as the general shape, the structure of the antennae, and 

 the double spur to the posterior tibiae, as well as the appendiculate claws, are character- 

 istic of /Sparnus, I have placed the present insect in that genus. 



ZETETICUS. 



Peribleptus, Clark, Cat. of Halticidao, p. 155 (1860) (nomen praeoc). 

 Zeteticus, Harold, Col. Hefte, xiv. p. 213 (1875). 



This genus, the original name of which was changed by Von Harold on account of 

 having been employed before, was established by Clark upon a Brazilian species 

 (Z. Icevigatus), which is characterized by incrassate palpi, subangulate sides of the 

 thorax, and bifid claws. All these structures are present in a single species obtained in 

 the State of Panama; I have therefore no hesitation in placing it in the present 

 genus. 



l. Zeteticus panamensis. (Tab. xxvi. fig. 7.) 



Broadly oblong-ovate, semipubescent, fulvous ; antennae black ; head coarsely, the thorax finely, punctured ; 

 elytra metallic blue, distinctly punctate-striate, the interstices finely punctured. 



Length 4 lines. 



Head strongly and closely punctured; the frontal tubercles not strongly raised, and divided by a deep longi- 

 tudinal groove ; the third joint of the palpi transversely incrassate, the apical one conical ; antennse 

 filiform, black (the three apical joints are wanting), the third joint the longest ; thorax nearly three times 

 as broad as long, the sides very obtusely angulate before the middle, the anterior angles acute, the surface 

 with a rather deep transverse depression across the disc, giving prominence to the anterior portion, which 

 is furnished with two small and very obsolete tubercles, the disc finely and rather closely punctured, 

 obsoletely pubescent near the posterior angles and at the sides ; scutellum fulvous, pubescent ; elytra very 

 obsoletely depressed below the base, distantly punctate-striate, the interstices also very finely punctured 

 and wrinkled, clothed with a few whitish hairs at the sides and at the apices; underside and legs 

 fulvous, the intermediate tibiae piceous at their apices ; posterior tibiae armed with a single spur • claws 

 bifid. 



Hah. Panama, Bugaba (Champion). A single specimen. 



MONOPLATUS. 



Monoplatus, Clark, Cat. of Halticidas, p. 2 (1860). 



Monoplatus is perfectly well characterized and comparatively easy of recognition on 

 account of the transverse thoracic groove and the dentate margin of the posterior tibiee ; 

 this latter character seems to me, however, subject to variation in regard to intensity, 

 and is almost obsolete in some species. Monoplatus and the following genera are 



