240 Memoirs on the Coleoptera 



ognomy and especially in the very constant thoracic form of that 

 genus. 



Adding rhodopus Scz., from description, the following is a tabular 

 statement of all those species of Lehia at present in my collection, 

 which have uniformly black, blue or green elytra, or at least elytra 

 devoid entirely of maculation; they are numerous and but very 

 few of them have been hitherto described. So far as concerns 

 certain subordinate structural characters, this division is probably 

 artificial, but at any rate it is a practical course to pursue in this 

 very difficult genus: 



Antennae wholly black. 2 



Antennae not entirely black 17 



2 — Pronotum black, with pale lateral margins. Body moderately 

 convex and ventricose, polished; head black, the elytra dark blue; 

 entire under surface and legs piceous-black; head well developed, 

 as wide as the prothorax, the eyes rather large and prominent, the 

 front smooth, faintly strigilate basally; antennae slender, more than 

 half as long as the body; prothorax rather small and short, fully 

 four-fifths wider than long, the sides subparallel, rounding strongly 

 before the middle; apex feebly sinuate; base lobed and transversely 

 grooved medially; surface minutely and feebly rugulose; sides 

 broadly deplanato-reflexed and diaphanously pale, the scutellum 

 piceous; elytra a fourth longer than wide, feebly inflated posteriorly, 

 much more than twice as wide as the prothorax, the sides finely 

 reflexed; striae fine, not impressed, finely, very obsoletely and 

 irregularly subpunctulate; intervals flat, the two discal punctures 

 at the third stria; scutellar stria short. Length 4.0 mm.; width 

 1.8 mm. Mississippi (Vicksburg) marginicollis Dej. 



Pronotum uniform in color throughout its extent, black, bluish or 

 greenish 3 



3 — Head and prothorax deep black, without metallic color, except a 

 feeble trace in truckeensis 4 



Head, prothorax and elytra uniformly bluish, greenish or in part viola- 

 ceous in color 6 



4 — Elytra black, with the feeblest obscure metallic lustre, polished, the 

 under surface and legs shining, greenish-black. Head slightly nar- 

 rower than the prothorax, with moderate and not very prominent 

 eyes, the tempora rather long; front smooth, with very few fine 

 rugulae laterally; at the centre there is a deep foveiform puncture; 

 antennae half as long as the body; prothorax barely three-fourths 

 wider than long, peculiarly narrowed anteriorlj^ with broadly 

 arcuate sides, parallel in basal half, the angles right; median lobe 

 and sulcus moderate; surface very feebly rugulose; sides rather 

 narrowly reflexed, broadly flat and explanate at base; median stria 

 distinct; elytra oblong, inflated behind, fully a third longer than 

 wide, much more than twice as wide as the prothorax; striae fine, 



