HEMIPTERA— HETEEOPTERA. 



105 



rather obscure, flattened tubercles ; disc of posterior lobe with an obscure 

 central raised area surrounded by a depressed area. Scutellum about as long 

 as broad, lateral margins at base subparallel, strongly elevated ; apex depressed, 

 lateral margins ridged ; disc with a broad median longitudinal percurrent ridge 

 and a less elevated, transverse per- 

 current ridge, the two forming the 

 conventional cross. Hemielytra long, 

 extending to the eighth (sub-apical) 

 abdominal tergite ; corium very short, 

 feebly thickened, veins not well 

 marked except along costal margin at 

 apex, basal costal lobe more or less 

 obsolete, its lateral margin straight, 

 parallel to axis of body and not ex- 

 tending beyond humeral angle of pro- 

 notum ; membrane long and broad, 

 completely filling dorsal surface of 

 abdomen within the connexival regions, 

 entirely without veins, more or less 

 distinctly transversely wrinkled. Ab- 

 domen more or less parallel sided, 

 very slightly widening towards apex ; 

 posterior lateral angles of segments of 

 connexivum very slightly prominent, 



the lateral margins more or less per- ^ . , . 



1 1 1 • 1 Text-pig. 6. — Chiastoploma pt/gmaea, gen. et. 

 current ; spiracles of second and third n. : dorsal view (legs omitted). 



abdominal segments placed on lateral 



edge of connexivum near posterior angles of segment, remaining spiracles placed 

 ventrally on connexivum but close to its lateral margin ; venter convex, 

 pygophor (ninth segment) and lateral processes of eighth segment feebly 

 prominent. 



Length, 2-5 mm. Breadth across humeral angles, 1-0 mm. 

 Tutuila : — Pago Pago : 1 ^ (type), in rotten Hau bark (Hibiscus tiliaceus), 

 22.ix.1923 (Swezey and Wilder). 



