HANCOCK 67 



3. Vertex in dorsal view with anterior border convex ; 



frontal costa viewed in profile not at all sinuate. 



subspec. liiggeri, Hanc. 



4. Pronotum distinctly incrassate ; superior lateral sinus 



of lateral lobes shallow; frontal costa in profile 

 moderately sinuate; face retreating. brmicri, Bol. 



ORNATUS GROUP. 



5. Vertex in dorsal view obtuse angulate; median carina 



distinctly projecting as a tooth at the middle of the 

 front border; frontal costa protuberant opposite 

 lower part of eyes. acadicus, Scudd. 



6. Body rather slender; median carina of pronotum dis- 



tinct, percurrent, in profile a little elevated anteri- 

 orly; front margin of vertex convex; superior 

 lateral sinus of pronotum quite deep. oniatiis, Harr, 



6A. Pronotum and wings more or less abbreviated. 



var. (). triangularis, Scudd. 



7. Pronotum anteriorly between and before the shoulders 



with the median carina arcuate, compresso-elevated; 

 middle femora enlarged, in the male nearly or 

 quite one-half as broad as long; body more robust. 



hancocki, Morse. 

 7A. Pronotum and wings abbreviated. 



Ii. ahhrcviatus, Morse. 

 7. 7. Middle femora of moderate proportions; body 



robust. crassiis, Morse. 



7. 7A. Pronotum and wings abbreviated. c. affiiiis, var. n. 



ARENOSUS GROUP. 



I. I. Median carina of pronotum not at all or very little 

 elevated, in profile barely undulate or anteriorly 

 gibbose; dorsum transversely flattened or subcon- 

 vex. 

 8. Frontal costa narrowly sulcate, rami closely approx- 

 imate; vertex distinctly depressed anteriorly; eyes 



