132 ENTOMOLOGICAL SOCIETY 



Thorax with distinct apical fossa not divided in the middle; more or 

 less trivittate, vittae half or less the length of thorax; median vitta usually 

 Y-shaped, either enclosing the apical fossa or appearing as a tubercle be 

 hind it; lateral vittae oblique, divergent toward base of thorax. 



Vestiture alutaceous, profuse or scant. 



Third joint tarsi : anterior, + ; middle, ; posterior, wider than 

 first joint. 



A synoptic table of the seven species which belong to this 

 group follows : 



a Thoracic vittae and apical fossa well defined. 



b Rostrum moderately arcuate and compressed, distinctly canaliculate 

 at base. Coating scant and easily abraded, not covering lower 

 surface or sides. 



c Dorsal surface strongly and coarsely punctate. Elytral sur 

 face normally without inequalities; intervals alternately 

 strongly and less strongly elevated. Medio-basal portion 

 of thorax coarsely, moderately confluent. Lower surface 



finely, sparsely punctate. N. E. to Tex... venatus Say 



cc Dorsal surface more coarsely .punctate, usually strongly con 

 fluent. Elytral surface very unequal, interrupting striae and 

 intervals. Lower surface less finely punctate. Oregon. 



coiiftuens, n. sp. 



bb Rostrum shorter, more arcuate and compressed, at base coated. 

 Thoracic vittae narrow. Coating thin, velvety, covering most 

 of the body. Lower surface coarsely punctate. Thorax strongly 

 convex. Vittae with shallow punctures, much finer than on 



interspaces. Fla., La vestitus, n. sp. 



bbb Rostrum not coated. Thoracic vittae wide, black. 



c Mostly black but with patches on base of rostrum, thorax and 

 elytra often piceous. Thoracic vittae broad, punctures 

 deeper, scarcely finer on vittae than on interspaces and else 

 where. N. M neomexicanus, n. sp. 



cc Thorax variable, red, brown or black, elytra rufous or light 

 dull brown. Thoracic vittse still widec, finely punctate. 



Ariz., Cal .ptaemtcitnsis, n. sp. 



aa Thoracic vittae usually feebly developed. 



b Reddish, surface coating moderately dense, gray or red, thin or 

 velvety. Scutellum shining black. Pygidium 9 moderately 

 narrowed to apex. First abdominal segment $ distinctly con 

 cave. Cal., N. M., D. C., Tex reticulaticollis Boheman 



bb Black, surface coating gray or brown, thick and felt-like, covering 



v nearly the entire body. Scutellum coated. Pygidium strongly 



narrowed to apex. First abdominal segment $ flat or scarcely 



concave. Tex coacforum, n. sp. 



