290 pentatomidjE. 



Cressona ; head usually broad and foliaceous, or elougate and 

 triangular, with the lateral lobes much longer than the central 

 lobe. 



A small subfamily, well represented in the Ethiopian and 

 Oriental Eegions, apparently unrepresented in the Nearctic and 

 Neotropical Eegions, occurring in the extreme Eastern area of the 

 Palsearctic Eegion, and represented in Australasia. 



Synopsis of Genera. 



I. Head small, narrowed anteriorly, lateral 



lobes not much longer than central lobe : 

 first joint of autennne passing apex of 

 head. 



a. Lateral angles of pronotum directed 



forward in long processes Cressona, p. 291. 



II. Head large, long or broad, lateral lobes 



much longer than the central lobe ; first 

 joint of antennae not reaching apex of 

 head. 

 A. Posterior margin of pronotum not 

 broader than base of scutellum. 

 a. Anterior angles of pronotum not 

 produced. 



b. Lateral angles of pronotum not, or 



only slightly, produced, 

 ai. Head about as broad as long ; 



scutellum and corium without 



pale margins or submargins .. Dalsira, p. 291. 

 h^. Head longer than broad ; 



scutellum and corium with pale 



margins or submargins ScHizops, p. 293. 



c. Lateral angles of pronotum angularly 



produced. 

 «-. Scutellum of medium size, 



distinctly narrowed posteriorly. Mercatus, p. 294. 

 b-. Scutellum elongate, gradually 

 (not suddenly) narrowed. 

 d^. Head narrowed, not acu- 

 minate anteriorly SALviANrs, p. 294. 



Z<3. Head triangular, acuminate. Gonopsis, p. 295. 

 c'. Head as long as pronotum or 

 longer. 

 or. Head as long as pronotum, 



lateral lobes widely separated. Uiplorhikus, p. 297. 

 b". Head longer than pronotum, 



lateral lobes contiguous .... Eandolotus, p. 298. 

 b. Anterior angles of pronotum lami- 

 natelj" produced. 

 a^. Lateral margins of head straight 



in front of eyes Tetroda, p. 298. 



b^. Lateral margins of head incised 



and ampliated in front of eyes. Gellia, p. 301. 

 J3. Posterior margin of pronotum broader 



than base of scutellum Megarhynchus, p. 301. 



