SUBFAMILY I. — PENTATOMIN^. 109 



more regularly oval than semivittata, and belongs more particu- 

 larly to the north and west of North America than that 

 species." Van Duzee (1916d, 231) mentions it as "found oc- 

 casionally on rank weeds about the lower end of Fallen Leaf 

 Lake, Cal., July 17." Stoner found it at Iowa City, la., July 9, 

 on wild carrot, Daucus carota L., growing within the city limits. 

 The black antennae and more widely rounded apex of head 

 readily distinguish it from semivittata. 



. III. Rhytidolomia Stal, 1872, 33. 



Medium or large elongate-oval or broadly oval subdepressed 

 species having the head as long or slightly longer than wide, 

 porrect or a little declivent ; cheeks broad, slightly concave 

 above, equalling or feebly surpassing tip of tylus (fig. 18, d) ; 

 tubercles at base of antennae ending in a short curved spine ; 

 bucculse narrow, parallel, their front edge dilated into a small 

 rounded lobe (fig. 18, a) ; beak reaching base of second ventral ; 

 pronotum with front half on a slightly lower plane, humeral 

 angles broadly rounded, side margins straight, entire; scutel- 

 lum with apical half rapidly tapering to a rounded apex; con- 

 nexivum narrowly or not at all exposed ; osteolar canal short, 

 tapering, not reaching the middle of its supporting plate. Three 

 of the six species recognized in the Van Duzee Catalogue occur 

 in the eastern states. 



KEY TO EASTERN" SPECIES OF RHYTIDOLOMIA. 



o. Second joint of antennae but slightly longer than third, side mar- 

 gins of pronotum not reflexed; second joint of beak almost as long 

 as third and fourth united; smaller, not over 11 mm. 67. SAUCIA. 

 na. Second joint of antennae distinctly longer than third; side margins 

 of pronotum narrowly sharply reflexed; second and third joints 

 of beak subequal, each one-half longer than fourth; larger, 14 

 or more mm. 

 b. Form elongate-oval; color dark olive brown, the margins paler; 

 width 8 mm. 68. senilis. 



bb. Form broadly oval; color olive-green, the costal border of elytra 

 beyond the middle blackish; width, 10 mm. 69. belfragii. 



67 (101). Rhytidolomia saucia (Say), 1831, 6; I, 318. 



Elongate-oval, subdepressed. Dull olive-green, costal border of 

 elytra dull yellow bordered within by a blackish line; pronotum and 

 scutellum with a narrow median dull yellow line; first and second joints 

 of antenna? and basal half of third, reddish-brown, remainder fuscous; 

 legs greenish-yellow to fuscous, the basal half of femora paler. Entire 



