THE CANADIAN ENTOMOLOGIST. U9 



the lateral ocelli. Head very closely, coarsely punctured, the area behind 

 the superior orbits somewhat more sparsely so, the vertex with the punc- 

 tures larger. Antennae nine-jointed, the apical joint very short and 

 almost wanting ; the antennae clavate, the club, which is flattened and 

 concave below, begins with the fifth joint. The thorax closely, coarsely 

 punctured, the anterior lobe a little more sparsely so ; the posterior part 

 of the scutellum with a median carina. Venation normal. Claws with 

 an inner tooth near the apex. Sheath subparallel margined, obliquely 

 truncate at the apex. Black ; clypeus, labrum, mandibles (apices 

 piceous), posterior margin of the pronotum, propleura, anterior part of 

 the scutellum, a spot above the posterior coxae, apical margin of the basal 

 plates, apical margin of the dorsal and ventral abdominal segments (the 

 band on the first dorsal is interrupted in the middle), straw- yellow. Legs 

 black ; anterior femora beneath and at the apex, intermediate femora 

 beneath, all the tibiae and tarsi, straw-yellow ; the apex of the posterior 

 tibiae and their tarsi dusky. Wings yellowish ; venation hiteous and 

 brown, the stigma luteous. 



Type locality : Ormsby Co., Nevada (C F. Baker). 



This species is close to nigriceps, Cresson, but when compared with 

 specimens collected in the same locality by Prof. Baker, the following 

 differences are to be noted : 



nigriceps, Cress. sub?iigriceps, Roh. 



i. Lateral ocellar furrows extending i. Lateral ocellar furrows extend- 

 beyond the lateral ocelli. ing to the lateral ocelli. 



2. Cheeks and vertex shining, rather 2. Cheeks and vertex dulled by the 



finely sculptured. coarse sculpture. 



3. Labrum broader and more curved 3. Labrum narrow and at the sides 



at the sides. nearly straight. 



4. Antennae not clavate, not con- 4. Antennae clavate, the club flat- 



cave beneath, nine joints. tened and concave beneath, 



the ninth joint very small. 



5. Postscutellum with a median 5. Postscutellum and the posterior 



carina. part of the scutellum with a me- 



dian carina. 



6. Teeth of the hind tarsal claw 6. The inner teeth of the hind 



about equal. tarsal claw shorter and stouter 



than the outer, 



