1905.] 



NATURAL SCIENCES OF PHILADELPHIA. 



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the cephalic width in the female; fastigium moderately declivent, 

 slightly (male) or considerably (female) shorter than the proximal 

 width, apex subtrimcate, broadly and shallowly sulcate and rounding 

 without demarkation into the frontal costa and sulcus, lateral view 

 of the fastigium regularly rounded, blending imperceptibly into the 

 face immediately ventrad of the median ocellus, the projection of the 

 fastigium more pronounced comparatively in the male than in the 

 female; lateral ocelli placed near the base of the fastigium on the supra- 



Fig. 36. — Rhachicreagra nothra n. gen. and sp. Lateral view of male type. 



antennal margin; frontal costa slightly expanded dorsad, extending to 

 the clypeal margin, slightly constricted immediately below the ocellus, 

 sulcus distinct, moderately deep, narrower dorsad than ventrad ; eyes 

 subovate, quite prominent in the male and elevated above the vertex, 

 very much (male) and distinctly (female) longer than the infra-ocular 

 portion of the gense; antennce as long as the caudal femora. Prono- 

 tum tectate, the median carina elevated, on the metazona developed 



Fig. 37. — Rhachicreagra nothra n. gen. and sp. Female type, lateral view. 



into a dentate crest, which is more apparent in the female than 

 in the male; cephalic margin produced arcuate, the median section 

 truncate; caudal margin emarginato-truncate ; no lateral carinas 

 present, but humeral angles distinct in the male; lateral lobes 

 of the pronotum distinctly longer than deep, particularly in the 

 male, cephalic margin sinuate with a distinct postocular emargi- 

 nation, ventral margin with a distinct cephalic emargination, subarcu- 



