137 



on the front part of the sides ; sometimes a darker stripe each side of the 

 median carina. Elytra niarlicd as in CE. pellucida, except that the yellow 

 stripes and spots are more extensive. Wings pellucid ; nervules dusky on 

 the apical half Hind femora and tibige as in that species, except that the 

 colors are paler. 



Diinensions. — Same as CE. pellucida. 



California, Montana (Thomas). 



I give this species as distinct from CE. pellucida on the authority of Dr. 

 Scudder, but I consider the two as identical, the only difference that I can 

 see being that the median carina of atrox is severed, while that of pellucida 

 is continuous. The coloration shows less difference than is often observed 

 between different specimens of the same species from the same locality. In 

 fact, my specimens of atrox agree moi'e exactly with Dr. Scudder's descrip- 

 tion oi pellucida than with that of atrox, with the exception given. 



!U.! '- ' 



/ 



<E. pellucida, Scudd., Bost. Jour. Nat. Hist., VII, 472. 



Size small. Foveola of the vertex distinct, sub-elongate, triangular ; 

 apex closed and rounded ; frontal costa narrow and convex above, expanding 

 below, impressed at the ocellus, not sulcate. Pronotum much like that of the 

 Stenobothri ; tricarinate ; median carina distinct and slightly prominent, con- 

 tinuous and solid, straight on top ; lateral carinae distinct, but not raised, 

 slightly arcuate along the posterior lobe, most convergent near the front 

 margin ; disk nearly flat ; no transverse impressions distinct on the disk ; an- 

 terior margin slightly angled ; posterior extremity also obtuse-angled. Elytra 

 and wings pass the abdomen slightly. Posterior femora about as long as the 

 abdomen in the female. 



Color. — Ash-brown. Face reddish-brown ; anteimaj yellowish at base, 

 dark-brown toward the apex ; a triangular, black spot behind the eye, apex 

 touching the eye. A quadrate, transverse, black spot on the anterior part of 

 the sides of the pronotum ; disk sometimes has a dark band along the middle. 

 Elytra fuscous-brown ; a yellow stripe along the dorsal angle ; a yellow line 

 reaches from the base along the sub-frontal nerve to a yellow spot on the 

 lower (or front) margin, near the middle ; apical half and lower margin 

 marked with yellow lines and fuscous spots. Wings pellucid, with black 

 nervules. Legs dark-brown; the hind femora yellowish or reddish-brown, 

 with two or three rather broad, oblique, dark-Iirown streaks, dark at the 

 18 A 



