W6 GEORGE H. HORN, M. D. 



margin (the lafctei- may be accidental) I retain this species in G-roup 

 3, Leconte, on account of the very shallow antennal fossae. It differs 

 from all our species to which it is allied by the outer marginal thor- 

 acic stria being short and scarcely extending one third from the an- 

 terior angle toward the basal margin. The elytra have no trace of 

 subhumeral stria, the first three dorsals are entire, the next two short, 

 the fourth having the anterior half obliterated, the fifth the anterior 

 two-thirds. At the base opposite the fifth stria, on one elytron, are 

 two punctures and on the other a very short stria. 



This species must be referred to Marseul's Group 7. 



One specimen, somewhat injured, collected at Fort Yuma, Cali- 

 fornia. 



The description of our species of Group 3, Lee, are widely scattered 

 and as those with red elyti-a resemble each other closely in description, 

 the following table is offered as a guide to our students of this family. 

 The arrangement of Marseul is so widely different from that of Dr. 

 Leconte that our nine species are spread in four groups. The num- 

 bers in parenthesis indicate the latter groups. 



Marginal stria of thorax entire. 

 Elytra without subhumeral stria. 



Hind tibiae compressed, biseriately spinulose, spinules 



distant; margin of thorax sparsely fimbriate biplagiatus, Lee. (7). 



Hind tibiae stouter, spinules very irregularly biseriate ; 



margin of thorax fimbriate with long hairs sellatus, Lee. (7). 



Elytra with distinct subhumeral stria. 



Subhumeral stria internal, and with humeral arcuate 

 appendage. 

 Form broadly oval; femora rufous, hind tibife robust, 



fourth dorsal stria very short or wanting arcuatus, Say, (4). 



Form oblong; femora piceous ; fourth dorsal stria ex- 

 tending three fourth to base Ulkei, Horn, (4). 



Sub-humeral stria internal, not appejidiculate at hu- 

 merus. 

 Outer edge of anterior tibia not dentate, color entire- 

 ly black laevipes, Er. (2). 



Outer edge of anterior tibia bidentate ; elytra in 



great part red Arizonae, Horn, (2). 



Sub-humeral stria external, short, visible only at hu- 

 merus. 



Body entirely black, form robust, convex Gloveri, Horn, (5). 



Elytra red in great part, less convex, broader instratus, Lee. (5). 



Marginal stria of thorax short, visible only in front militaris, Horn, (7). 



The above mentioned species have the thoracic margin more or less 

 fimbriate, and with the exception of laevipes the anterior tibiae are 

 bidentate. Two are entirely black the others have red elytra with a 



