BUFFALO SOCIETV OF NATURAL SCIENCES 79 



Dorsal crest proportionately less, elevated, with a sinus at its 

 anterior base, 3. 



1. Darker with the characteristic markings distinct, 



1, fenestratus Fh. 

 Paler with the characteristic markings obscured, 2. 



2. Pale yellowish (or green in life?), immaculate or nearly so, 



2, ovatus VanD. 

 Sides of the pronotum with a transverse brown band post- 

 eriorly (Emmons), arcuatus Emm. 



3. Crest rather high, placed well forward, subtriangular, 



rounded at summit, its anterior and posterior declivities 

 nearly rectilinear, posterior process slender, sinuated, 

 and acute at apex; markings distinct; length 8 mm. ; in- 

 habits Arizona, 6, grandis VanD. 



Crest when elevated regularly arcuated superiorly, 4. 



4 Crest well elevated, beginning forward nearly to the front 

 line of the metopidium but still with a distinguishable 

 sinus at its anterior base, 5. 



-. Crest when elevated beginning above or behind the humeri, 



7- 



5. Posterior sinus wanting, the dorsal line rectilinear from the 



highest point over the humeral sinus to the apex; mark- 

 ings distinct, 7, sculpt us Fairm. 



Posterior sinus obvious but not deep, the dorsal line before 

 it rounding to the highest point at or about the middle 

 of the pronotum, 6. 



6. Color fuscous brown with the markings obsolete, margins 



of the cheeks rectdinear or slightly sinuated, 



3, fuliginosus Emm. 



Color pale ferruginous to brown; the markings represented 



by the anterior oblique vitta and a brown line bordering 



it posteriorly, 4, muticus Fabr. 



7. Larger, 9 mm. ; crest well elevated with a strong sinus at 



either end; the characteristic markings strongly dis- 

 tinguished ; the median spot connecting with the anterior 

 vitta at an angle, 5, tuber osus Fairm. 



Smaller, 7 mm. or less in length, 8. 



