121 



<E. gracilis, Thos., Geol. Siirv. Terr., 1871, 461. 



Male. — Small size, slender. Vertex narrow ; the central foveola elon- 

 gate, open in front ; the sharp margins continuous with the likewise sharp 

 margins of the narrow and deeply-sulcate frontal costa. Pronotum tricari- 

 nate ; median carina slightly prominent, twice notched, front portion most 

 elevated, middle section very short, tuberculiform ; posterior incision a little 

 in advance of the middle ; lateral carinse distinct ; apex right-angled. Elytra 

 and wings long and narrow. Antenu£e slender, passing the pronotum. Eyes 

 sub-globose, prominent. 



Color (dried after immersion in alcohol). — Ash-gray, mottled with fus- 

 cous, which pervades nearly uniformly head, thorax, and elytra ; sometimes 

 two yellowish stripes are more or less distinct on the disk of the pronotun>, 

 one along each lateral carina.. Wings pale transparent-yellow next the base 

 (possibly pale-red when living) ; apical half dusky, the inner portion darkest, 

 and forming a rather narrow, irregular band, whicli curves but slightly on the 

 lateral margin, approaching but very little toward the anal angle ; the rest of 

 the apical portion clouded ; the intermediate portion between the band and 

 apex somewhat transparent. Lower channel and inside of the posterior 

 femora black ; a pale ring near the apex. Antennae fuscous, with yellow 

 annulations. 



Dimensions. — Length, 0.85 inch ; elytra, a little longer than the body, 

 0.9 to 0. '5 inch ; hind femora, 0.46 inch; posterior tibige, 0.4 inch. 



Colorado, Wyoming (Thomas). 



I have specimens which are probably females of this species, but am in 

 doubt in regard to them. 



€E. kiovra, Thos., Geol. Surv, Terr., 1871, 461. 



Size small, and the top of the head convex and elevated, as in CE. lon- 

 gipes, Charp. Vertex broad ; central foveola quadrate or sub-hexagonal, with 

 a channel in front, connecting with the sulcus of the frontal costa; lateral 

 foveolse distinct ; frontal costa rather narrow, distinctly sulcate throughout. 

 Eyes very prominent, slightly oblong. Pronotum more than usually con- 

 tracted a little in advance of the middle, tricarinate ; the median carina dis- 

 tinct, but not very prominent, twice notched, the posterior notch about the 

 middle ; lateral carinse distinct on the posterior lobe, indistinct on the front 

 portion ; disk somewhat rugose ; angle of the hind border a little larger than 

 a right angle. Elytra and wings rather narrow, passing the abdomen. 

 16 A 



