MCNEILL REVISION OF THE TRUXALINiE OF NORTH AMERICA. 247 



StenobotJu-us occipitalis, Bruner, 1884. Biil. 4 Div. Ent., 58. 



Oxycoryphvs occipitalis, Thos., 1876. Proc. Dav. Acad. Nat. Sci., 

 I, 251. 



Orchri/idea occipitalis, Bruner, 1889. Pro. U. S. Nat. Mus , XII, 52. 



Orchriliilea occipitalis, Townsend, 1893. Insect Life, VI, 31. 



Orchrilidea occidentalis, Bruner, 1893. XII, Proc. U. S. Nat. 

 Mus., 5 1. 



Stenobothrus occidentalis, Bruner, 1893. XII, Proc. U. S. Nat. 

 Mus., 51. 



Hab. Both slopes of the Rocky Mountains, extending from New 

 Mexico and Arizona to Idaho and Montana and as far east as western 

 Nebraska and Dakota. According to Bruner this and the following 

 species are "frequenters of the mountain slopes and foot-hills and 

 especially so when these localities are somewhat sandy. Like crenulata 

 they are partial to the bare surfaces, and are very active in their move- 

 ments. " The National Mu>eum contains what appears to be Thomas' 

 type as well as other specimens from Colorado, Wyoming, Montana, 

 and Nebraska. 



2. Alpha ciNEREA, Bruner. 



Orchrilidea ci/ierea, Bruner. Proc. U. S. Nat. Mus., XII, 51. 

 Hab. Wyoming, Idaho, Western Dakota, and Nebraska. 



3. Alpha crexul.ata, Bruner. 



Orchrilidea crenulata, Bruner. Proc. U. S. Nat. Nat. Mus., XII, 51. 



Hab. Both slopes of the Rocky Mountain?, from the southern to 

 the northern boundaries of the United States, as far east as western 

 Dakota and Nebraska. 



XIX. PHLIBOSTROMA, Scud. Fig. 19. 



Body robust, with the head unusually large. The occiput is strongly 

 convex. The vertex convex, declivent, and not sulcate, advanced in 

 front of the eyes only half as far as the distance between them, with 

 distinct lateral carinae which are nearly straight and meet in a rounded 

 angle. There is sometimes a trace of a median carina. The lateral 

 foveolae are scarcely separated from the front by a carina which is al- 

 ways weak, sometimes wanting. The frontal costa is nearly plain or 

 sulcate with heavy lateral carinae which are very moderately divergent 

 downward. The face is gently arcuate and very moderately oblique. 

 The antenna; are filiform, longer (female) or considerably longer (male) 



