110 GEO. H. HORN, M. D. 



Body above yellow or pale castaneous: head yellow, except in atriceps : elytra 



vittate in bivittatus .'. 2. 



Body above bicolored or metallic; head black 3. 



2. — Elytra with the suture and a vitta piceous bivittatus. 



Elytra not vittate. 



Head never black, legs testaceous, or with the tibite darker; surface 



shining variooriiis. 



Head, legs and underside black ; surface subopaque atriceps. 



3. — Thorax yellow 4. 



Thorax blue or black 8. 



4. — Form oval ; thorax twice as wide as long; prosternum not visible between 



the coxfe 5. 



Form oblong; thorax not much wider than long 6. 



5. — Elytra piceous, sparsely punctate ; legs almost entirely yellow. 



tlioraoicns. 



Elytra dull blue, densely punctulate; legs entirely black luteicollis. 



6. — Prosternum not visible between the coxse ; second joint of antenuse very 



small texaiius. 



Prosternum quite distinct between the coxse; second joint of antennae a 



little shorter than the third 7. 



7. — Elytra at most obsoletely punctate, usually nearly smooth. 



All the tibiae yellow traiisitns. 



Anterior tibige alone yellow latieeps. 



Legs piceous, all the knees slightly paler Wickliami. 



Elytra very evidently punctate. 



Anterior knees alone yellow torqtiatns. 



8. — Antennae entirely yellow : legs yellow, or more yellow than piceous 9. 



Antennae in great part piceous: legs black, or with but little yellow (except 



in spretus) 10. 



9. — Legs entirely yellow; elytra minutely alutaceous, without punctuation. 



Liccoutei. 

 Legs more or less varied with piceous. 

 Elyti-a punctate and alutaceous; hind angles of thorax dentiform; all 



three femora more or less piceous nieraca. 



Elytra very obsoletely punctate, scarcely alutaceous; hind angles of 

 thorax not dentiform; middle and posterior femora partly piceous. 



cyaiielliis. 



10. — Legs entirely black 11. 



Legs bicolored 12. 



11. — Body blue; surface punctate and alutaceous; antennae bicolored at base. 



smaragclinus. 

 Body above black, sparsely punctate, not alutaceous; antennae black. 



moriiliis. 



12. — Legs in great part yellow, the femora piceous at base spretus. 



Anterior tibiae and knees, middle and posterior knees also yellow. 



Morrisoiii. 

 Anterior tibiae and knees yellow Taripes. 



L.. bivittatus Lee, Proc. Acad. 1859, p. 81 ; loc. cit. 1865, p. 209.— Form 

 elongate, beneath piceous, above yellow, each elytron with the suture and a vitta 



