AMERICAN COLEOPTERA. 145 



from whose paper I extracted what concerned our species in the short 

 review published by me in Trans. Am. Ent. Soc. 1868, p. 313. 



Surface granulate without trace of strise or punctures retasus. 



Surface not granulate, elytra striate or with rows of punctures. 

 Joints of antennal club entire. 



Body above opaque, elytra with rows of punctures only opacilS. 



Body above shining more or less metallic. 



Striae of elytra without punctures semiopacilS. 



Striae of elytra punctured. 



Sutural stria alone impressed, disc with rows of fine punctures only. 



Anterior tibiae strongly spinous posteriorly chalybseus. 



Striae all impressed. 



Thorax with very few obsolete punctures at the sides occidentalis. 



Thorax with numerous coarse punctures at sides. 



First joint of middle tarsus shorter than the next three together. 



splendidns. 

 First joint of middle tarsus equal to the next three. 



Elytral striae coarsely crenately punctured Egcriei. 



Elytral striae more finely punctured Blackburiiii. 



Second joint of club emarginate, partially concealed on one side where the 



club is closed Balji. 



G. conicoUis Jekel, is merely a variety of Blackburnii. 



PliECTRODES Horn. 

 This genus was indicated by nie (Trans. Am. Ent. Soc. 1867, p. 166), 

 on specimens obtained from Visalia, Cal. Since then two other species 

 have been discovered having considerable superficial resemblance to 

 the typical form but distiaguished by characters which seem worthy 

 of more special notice. 



P. piibesceus Horn, loc. p. 167. 



Anterior legs. — Anterior claw strongly arcuate, armed with a long subbasal 

 tooth a little longer than half the apical portion. Posterior claw feebly curved 

 except at tip, at base a moderate dilatation not dentiform in character. 



Middle legs.— Anterior claw as above. Posterior claw with a more abrupt 

 dilatation but not dentiform. 



Posterior legs. — Anterior claw as above. Posterior claw with a still more 

 abrupt dilatation, rectangular in front and dentiform at its tip. 



The claws on the three tarsi are shown on PI. Ill, fig. 7 a. 



Last joint of maxillaiy palpi not wider than the third, as long as the pre- 

 ceding joints together, form oblong obtuse at tip and moderately excavated 

 on its outer face. It is a little less in length than half the antennal club. 

 PI. Ill, fig. 7d. 



P. Carpenter! Lee, Wheeler's Rep. 1876, App. H, 10, p. 516. 



Anterior legs. — Anterior claw strongly arcuate, armed at base with a slender 

 acute tooth one-third the length of the apical portion. Posterior claw moder- 

 ately arcuate, scarcely dilated at base. 



Middle legs. — Anterior claw as above. Posterior claw slightly dilated at base 

 with a minute tooth. 



THANS. AMER. ENT. SOC. VIII. (19) MAY, 18S0. 



