432 PSYCHE. [October .S<35. 



b^. Tip of ovipositor serrate or dentate; last joint of maxillary palpi almost 

 transversely excised at apex. 



c'. Ovipositor distinctly (at least a tenth) longer than hind femora. 



d'. Blackish ; dark and light colors of tegmina of 9 feeblv con- 

 trasted longitudinally above (Northern) . . . fasciatus. 

 d'. Grayish; dark and light colors of tegmina of 9 stronglv con- 

 trasted longitudinally above as on sides (Southern) . canus. 

 c". Ovipositor barely as long as, or slightly shorter than, hind femora, 

 d^ Pronotum distinctlv tapering, fully twice as broad posteriorly 

 as long ; teeth of ovipositor exceptionally fine. . . melleus. 

 d'-. Pronotum scarcely tapering, less than twice as broad posteriorly 

 as long; teeth of ovipositor relatively coarse. 



e'. Teeth of ovipositor blunt, little elevated; wings generallv 

 veiy long. ........ socius. 



e^. Teeth of ovipositor sharp, well elevated, well separated ; 

 wings wanting. 



f '. Tegmina of 9 nearly or quite twice as long as prono- 

 tum ; of $ strongly rounded ajjically, feebly margined with 

 pallid at sides of dorsal field oidy, if at all utahensis. 



f ^. Tegmina of 9 scarcely longer than pronotum ; of $ 

 broadly rounded apically, with the dorsal field distinctlv 

 m.irgineJ with pallid throughout except at base. 



ambitiosus. 

 A-. Ovipositor distinctlv (at least one-fourth) shorter than the hind femora, 

 u^uallv a little arcuate. 



b'. Tegmina of 9 nearly or quite as long as the abdomen ; wings geneially 

 twice as long as tegmina. 



c'. Ovipositor no longer, or scarcely longer, than head and pronotum 

 together. 



d'. Face without vertical pale stripes; lateral field of 9 tegmina 

 tapering only on the apical third, subequal before it. 



neomexicanus. 

 d'-. Face with a pair of narrow, vertical, percurrent, pale stripes 

 next the inner margin of the eyes ; lateral field of 9 tegmina regu- 

 larlv tapering almost from the base. . . . trinitatis. 



C-. Ovipositor distinctly longer than head and pronotum together. 



d^ Tegmina of 9 apically truncate, a little shorter than the 

 abdomen ; wings wanting ..... aterrimus. 



d'^. Tegmina of 9 apically rounded, as long as the abdomen ; wings 

 generally present and then very long. . . . cubensis. 



