74 FAUNA HAWAIIENSIS 



(17) Agrion oahuense Blackb. 



Agrion (?) oahuense Blackburn, Ann. Nat. Hist. (5) xiv. 1884, p. 414 (^). 



Female with the abdomen black or more or less piceous, most of the segments 

 with a narrow pale basal band. Apex of labrum widely, and a transverse band behind 

 the clypeus pale. Post-ocular spots present, connected, sometimes obscure. Posterior 

 margin of prothorax slightly produced in the middle. Latero-dorsal lines of thorax and 

 median carina reddish. Legs pale. Three cellules between the quadrilateral and the 

 nodus. Post-pterostigmatic cellules at least in the posterior wings more or less duplicated. 

 This series consists of 12 — 14 cellules at least, the divided cellules, which vary from one 

 only to many, being considered as single cellules in the count. Superior appendages 

 dark, valvules and their appendages generally of an obscure colour, sometimes quite 

 pale. Size about that of the ^, and of similar slender form, the abdomen very slightly 

 stouter. (Plate V. figs. 12 & 12 a.) 



Hab. High ridges of mountains on Oahu (3000 ft.). Nymphs living between the 

 leaves of Astelia veratroides. 



(18) Agrion satelles Blackb. 



Agrion (?) satelles Blackburn, Ann. Nat. Hist. (5) xiv. 1884, p. 414. 



Hab. Haleakala, Maui (4000 ft.). (Blackburn.) I cannot identify this species 

 with any known to me. A large form of Agrion deceptor and a similar one of 

 A. calliphya are common in the locality. 



(19) Agrion deceptor M"^Lachl. 



Agrion (?) deceptor M'^Lachlan, Ann. Nat. Hist. xii. 1883, p. 235. 



A common species in most parts of the Islands. Examples from Maui, Lanai and 

 Molokai are generally larger than the Oahuan specimens, the largest attaining a length of 

 46 mm., the front wings often having as many as 22 post-cubitals. The thoracic markings 

 and the amount of red on the abdomen are variable. In Maui specimens the two basal 

 abdominal segments are often nearly entirely black above in the $. In dark-coloured 

 %% the two basal segments are black above, with or without red spots, the third black 

 at the base and apex and with a median black line in the central red portion, the 

 following segments except for a narrow pale basal band nearly entirely dark, the apex 

 of the 8th and 9th and the whole of the loth more or less red. In the ^ the small lower 



