MCNEILL REVISION OF THE TRUXALIN^ OF NORTH AMERICA. 249 



Phlibostroma picta, Scud., 1875. Cent. Orth., 29. 



Phlibostroma picta, Bruner, 1883. 3rd Rept. U. S. Ent. Com., 57. 



Phnbostrotna picta, Bruner, 1885. Bui. Wash. Col. Lab. Nat. Hist., 

 No. 7, 199. 



Phlibostroma parva, Scud., 1876. U. S. Geol. Surv. W. 100 Mer., 

 App. J J, 510- 



Phlibostroma parva, Bruner, 1883. 3rd Rept. U. S. Ent. Com., 57. 



Phlibostroma parva, Bruner, 1885. Rept. Com. Agr., 307. 



Phlibostroma parva, Bruner, 1885. Bui. Wash. Col. Lab. Nat. Hist., 

 No. 7, 199. 



Stenobofhrus laetus, Uhler, 1877. Bui. U. S. Geol. and Geog. Surv. 

 Terr., HI, 792. 



^ot Philobostroma parva, McNeill. Psyche, VI, 64. 



Hab. The eastern slopes of the Rocky Mountains from Texas to 

 British America and eastward to Kansas and Nebraska. 



The study of a considerable number of specimens from numerous 

 localities and an examination of Scudder's type of Phli. pictum and of 

 what appears to be Thomas' types of St. qiiadrimaculatus in the Na- 

 tional Museum has led me to the conclusion that there is but a single 

 variable species of this genus in the United States. The United States 

 National Museum contains specimens from Colorado, Nebraska, Wyom- 

 ing, British America, and Texas. 



XX. BOOPEDON, Thos. Fig. 20. 



Vertex declivent, convex and not separated from the front by dis- 

 tinct carinse and not forming an angle with the front, but united with 

 it in a curve. The foveoht of the vertex and of the tempora are indi- 

 cated by punctures or sometimes by very shallow sulcations. The 

 latter are dorsal. The front is nearly perpendicular. The frontal 

 costa is very broad, about equal to half the width of the vertex be- 

 tween the eyes, convex with the sides very little parallel, only a little 

 constricted at the vertex, vanishing before reaching the clypeus. The 

 antennae are filiform, much (male) or somewhat (female) longer than 

 the head and pronotum. The disk of the pronotum is more or less 

 elevated toward the median carina. This is unusually prominent and 

 is cut near the middle by the principal sulcus only. The lateral 

 carina are nearly parallel or very moderately sinuate and on the met- 

 azone divergent. They are most distinct on the anterior margin of 

 the prozone, obsolete on the metazone. The posterior margin of the 



