AMERICAN COLEOPTERA. 245 



The species A — b group themselves as follows : 



n. Winged species with strongly curved claws: (decens, sinuatus, hlandiis Ac.) 

 h. Winged species with regularly curved claws ; {angusticollis of Europe.) 

 c. Apterous species with regularly curved claws : {angustatus &c..) 



Those of A — c may be oroupecl thus : according as the tarsi have a 

 middle groove besides the lateral ones, and the mentum tooth is longi- 

 tudinally impressed at tip, so as to appear slightly divided, or altogether 

 simple and pointed : 



Series I. Tarsal joints without medial groove; iipper surface of body pubes- 

 cent : 

 Group A. With lateral grooves on the first three joints of the middle and 

 hind tarsi : 

 a. Mentum tooth broad, obtuse, and simple. — {Orthotrichus Peyr.) [P. 

 cymindoides of Egypt.) 

 Series II. Tarsal joints without medial groove ; upper surface of body glabrous : 

 Group A. Lateral grooves of the first three joints of middle and hind tarsi 

 always evident: 

 a. Mentum tooth somewhat cleft. — {hicoloratus Zhwiw. =^bicolor || Lee; 



hrunneomarginatus.) 

 h. Mentum tooth smooth and simple. — {extensicoHis, decorus.) 

 Group B. Lateral grooves of all the tarsi very feeble, in some specimens 

 not apparent : 

 a. Mentum tooth smooth and simple. — (prasinus of Europe.) 

 Series III. All five tarsal joints with a medial groove; upper surface of body 

 glabrous : 

 Group A. First four joints of hind and middle tarsi with lateral grooves: 



a. Elytra with 3 dorsal punctures. — {funebris Lee.) 



b. Elytra with 2 dorsal punctures. — {albipes of Europe.) 



The species of division B — d have for the most part only lateral 

 grooves on the basal joints, though sometimes the middle groove is also 

 present. By this character and by the form of the claws, aided by the 

 color of the elytra, they may be grouped as follows : 



Series I. Tarsi with a medial groove; claws regularly curved : 



Group A. First three joints of middle and hind tarsi with lateral. grooves: 

 a. Elytra with three dorsal punctures. — (subcordatus Lee.) 

 Series II. Tarsi without medial groove ; claws regularly curved ; 



Group A. First three joints of middle and hind tarsi with lateral grooves; 

 elytra margined with yellow: 



a. Elytra with 4 or more dorsal punctures. — (macuHcollis, variolatus.) 



b. Elytra with only 3 dorsal punctures. — {marginatus of Europe.) 

 Group -B. First three joints of middle and hind tarsi with lateral grooves, 



elytra without yellow margin : 



a. Elytra with 4 or more fovese on the 3rd interval. — {S-punctatus.) 



b. Elytra with 4 or more dorsal punctures. — {deplanatu.s,placidus, chal- 



ceuH.) 



c. Elytra with 3 dorsal punctures. — {excavatus, cupripennis, metallescens.) 



TRANS. AMER. EST. SOC. (32) FEBRUARY, 1869. 



