STUDIES IN THE AMERICAN BUPRESTID^ 5 1 



Outer antennal joints with the sensory fossae single and intero-terminal, 

 very rarely obsolete 7 



7 — Elytra very irregularly sculptured; pronotum always sulcate; epistoma 

 unusually narrowly and deeply emarginate 8 



Elytra with regular sculpture, never having the large, uneven and interrupt- 

 ing depressions of the preceding group; pronotum generally without a 

 median sulcus though sometimes impressed along the median line; 

 epistoma more broadly and feebly sinuate as usual; legs slender. 

 Holarctic f aunal region 9 



8 — Pronotum bisulcate, the median line more or less evidently costuliform; 

 elytra with deep irregular depressions, the side margins never more 

 than feebly serrulate posteriorly, the apex generally obtusely angulate; 

 antennae with the setigerous pores scattered and perforate, the sensory 

 fossa obsolete; labrum corneous; mentum very transverse, truncate, 

 wholly corneous; presternum bisulcate. Holarctic regions. [Type 

 Buprestis mariana Linn.] Chalcophora 



Pronotum unisulcate; antennae rather thick, the outer joints with close- 

 set impressed setigerous pores and with well developed intero-apical 

 sensory fossae, the latter irregular in form; labrum coriaceous; mentum 

 less transverse, trapezoidal, corneous in more than basal half, the apical 

 part coriaceous; elytra irregularly punctured, very unevenly costulate 

 and with very large and shallow interrupting areolae, the lateral edges 

 strongly serrate posteriorly, the apex not truncate; presternum and 

 first ventral impressed along the median line. Nearctic regions. [Type 

 Buprestis campestris Say] Texania 



9 — Scutellum large, the remaining characters nearly as in Buprestis, the 

 elytra regularly striate. Europe. [Type Buprestis austriaca Linn.]. 



* Eurythyrea 



Scutellum small; elytra striate; labrum generally wholly coriaceous and 

 pale in color but becoming corneous and metallic basally in some 

 aberrant species ; elytral apices rounded or truncate, sometimes bispin- 

 ulose, the sides not serrulate posteriorly; presternum convex or flat- 

 tened along the middle; first ventral convex to deeply sulcate; basal 

 joint of the hind tarsi more or less considerably elongate. Holarctic 

 regions. [Type B. octoguttata Linn.] Buprestis 



Elytra not striate but regularly costate, with densely cribrate and broadly 

 concave intervales, without trace of serial punctures; labrum always 

 corneous and metallic basally ; presternum impressed and punctured 

 along the middle; elytra rounded or truncate at tip. Nearctic re- 

 gions. [Type Ancylocheira lauta Lee] Cypriacis 



Elytra densely and subevenly cribrate, without striae, but having regular 

 series of large perforate punctures; remaining characters nearly as 

 in Cypriacis. Atlantic Nearctic regions. [Type Buprestis decora 

 Fabr.] Stereosa 



10 — Hind coxae strongly dilated within as usual, their hind margin thence 

 strongly oblique to the sides; antennal fossae antero-internal, small and 



