HEMIPTERA 151 



Subfam. PLOIIARIINAE. 

 ( = Emesidae Leth. and Sev.) 



Ploiariodes F. B. White. 



Ploiai'iodes White, 1881, Ann. Mag. Nat. Hist. (5) vii. p. 58. 



Ploiai-iola Renter, 1S88, Act. Soc. Sci. Fenn. xv. p. 711. 



Ploiariodes differs from Ploiariola only by the unreflexed lateral margins of the 

 pronotum ; the tuberculate posterior margin of the pronotum (mentioned in the original 

 description) is only a specific character. 



The typical forms are confined to the Hawaiian group, but the genus as a whole is 

 distributed over the palaearctic and nearctic Regions, Central America and Ceylon. 



1. k prominent tubercle on the posterior margin of the pronotum in the middle; 



elytra whitish variegated with fusco-cinereous (/) whitei. 



\a. Pronotal tubercle absent 2. 



2. Elytra whitish variegated with dark grey ; a more or less bright crimson spot or 



streak on the costal margin of the membrane (2) ruhromaculata. 



2a. Elytra whitish variegated with fuscous ; no reddish spot {f) pidchra. 



( I ) Ploiariodes tu/iilei F. B. White. 



Ploiariodes K'/^/Ztv' (Blackb. MS.) White, 1881, Ann. Mag. Nat. Hist. (5) vii. p. 59. 



Hab. Hawaii, Kilauea (July, August, September), Perkins ; Kona, 3500 ft. 

 (June), Perkins. — Oahu, N. W. Koolau (August), Perkins. — Mauna Loa, 4500 ft., on 

 dead branches of trees (Blackburn). — Maui, jao Valley, Perkins. I have examined 

 22 e.xamples. 



(2) Ploiariodes rubroniaeitlata Blackb. 



Ploiariodes nibroinacnlata Blackb., 1S89, Proc. Linn. Soc. N. S. W. (2) iii. p. 349. 



Hab. Hawaii, Kona, 3000 — 3500 ft. (June, October), Perkins, "beaten from a 

 species of 0/iia at an elevation of about 4000 feet on Mauna Loa" (Blackburn); 

 Kilauea (August), Perkins. — Maui, Haleakala, 5000 ft. (April, May, October), Perkins. 

 — Molokai, 3000ft. (September), Perkins; Olaa (December), Perkins. — Oahu, Kaala 

 Mts., 2000 ft. (April), Perkins ; Waianae Mts., 2000 ft., beaten from dead Koa bough 

 (April), Perkins. I have examined 10 specimens collected by Mr Perkins, and 

 Mr Blackburn has kindly lent me his type for comparison. 



F. H. III. 20 



