Briefly characterized as follows: Form of a long Issus. Vertex 

 short, transverse, lunately emarginate behind, the apex slightly 

 angularly produced. Frons oblique, just in front of junction with 

 vertex, decidedly and angularly projected backwards, making the 

 base of the frons plainly visible from a dorsal view of the insect, 

 the sides gradually enlarging to near the apex, an ocellus placed at 

 apex of the median carina. Clypeus. triangular, convexly elevated 

 longitudinally. Pronotum very narrow, entering deeply into the notch 

 of the head, the lateral carinae curved out behind the eye and reach- 

 ing the lateral margins. Scutellum long, tricarinate. Brachypterous 

 elytra scarcely longer than the abdomen, bluntly rounded at tip, the 

 veins coarse, granulate, the medial areoles few, long, narrow, the apical 

 series composed of rather short areoles which widen apically, the 

 clavus large, long, and acutely triangular. Legs short, stout, the 

 anterior femora grooved and carinate beneath, tibiae flattened on the 

 outer surface and margined with carinate lines. 



Haplotype of the genus: Monorachis sordulentus Uhl. 



Fig. 17 Monorachis sordulentus Uhler, brachypterous male, 

 greatly enlarged. (Original). 



Monorachis sordulentus UHLER 

 (1901 Proc. Ent. Soc. Wash., iv, No. 4, pp. 509-510) 



General color dark brown, somewhat clouded with obscure fulvous. 

 Vertex short, transverse, rather lunately emarginate behind, apex 

 slightly angularly produced, testaceous-yellow. Frons soiled yellowish- 

 brown, the sides gradually enlarging to near the apex, oblique. Pro- 

 notum and scutellum pale fulvous on disc, piceous on sides outside 



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