179 
Frena exceeding mid-scutellum; diffusion area well developed. 
Osteolar prolongation short, reaching about 1/3 the distance from orifice 
to lateral margin of metasternum; juga not surpassing tylus..... 
Bre Lan Oeil ceeteint, Sele pie eietane meee. cekae wie Sic Oiiaks oe (Pentatoma Auct.) 
Sides of pronotum with distinctly reflexed margin. 
Third rostral shorter than second and about equal to fourth....... 
Se freee Eee Mais Git Crete ee eis cee New EUS Moroes 5. Chlorochroa. 
Third rostral about equaling second, and longer than fourth....... 
IE User tein ia AL whedon lacie ears We. aS oS ae 6. Rhytidolomia. 
Sides of pronotum with margin acute but not refiexed (Atlantic 
states, Col., Mont., Lower Cal.).........2..,-2+-+. Liodermion Kirk. 
Osteolar prolongation reaching half-way or more to lateral margin of 
metasternum. 
IMEAIOt SULPASSINE LING) anise Seater Fess Seles eee eee 7. Thyanta. 
Juga surpassing tylus and meeting in front of it......... 8. Peribalus. 
Frena not reaching mid-scutellum; diffusion area very small and ill- 
LSE he be teetet Ta he ooctaitay a) ocargaey diaeayt atuersvnia Sloe btiatetals Seal oialaswie'~' ss 9. Trichopepla. 
Osteole with the rounded—rarely elongate—orifice on the outer side of a 
low elevation, which extends around its anterior side and outwardly, 
usually as a short raised auricle with a more or less free obtusely 
rounded apex. 
Head at least 7.8 as wide as scutellum. [Prothorax with a sharp plate 
like production of anterior margin on each side ventrally which 
ecurves ridgelike mesad of coxa but does not extend caudad beyond 
the latter.] 
Pronotum with median ridge only; [lateral extension of prothorax on 
venter not extending beyond anterior margin of eye].10. Neottiglossa. 
Pronotum 3-ridged, sides straighter; [lateral extension of prothorax on 
venter extending much beyond anterior margin of eye] (Col. and 
Neb, nortiiward inte Camas oo. Ses oo ass oles ten se be eee Aelia Fabr. 
Head less than 7/8 as wide as scutellum. 
Osteole with inner end nearly in line with outer sides of adjacent 
~ eoxae, without evident raised auricle or canal or the usual large 
GPAGUCHALEAa tarde set is eee eeialc afte aaah aise s Steinle = a's 11. Murgantia. 
Osteole about as far laterad of the outer sides of the coxae as the coxal 
diameter; an evident raised auricle and a well-defined large opaque 
area present, rarely one or the other not developed. 
Hind tibiae smoothly rounded above, at least on basal half. 
Bucculae strongly arcuate, much exceeded behind by first rostral. 
Scutellar breadth at apices of frena fully twice length of frena.. 
atc Ne EET Ne teeta oct ie ep ete ate Sola Schateo 0 4 12. Cosmopepla. 
Scutellar breadth at apices of frena at most little more than 
NONE UIDE DB RWEPON ce ferret aie eicicice chalets Soe cetele areata sis ie ore 13. Mormidea. 
Bucculae nearly straight-edged, not exceeded behind by first rostral. 
Tylus rounded at apex, not surpassing juga; eyes and pronotum 
COO) TS SET CELT IEL Srey 5 oy ARNE Re REIS RRR OV ORION Sr) IEEE 14. Solubea. 
Tylus acute at apex, strongly surpassing juga; eyes distant from 
pronotum about as far as their diameter............ 15. Prorys. 
