156 



INSECTS OF SAMOA. 



Family Nabidae. 



57. Arbela * costalis Stal. 



Arbela cosl.alis Stal, Kongl. Svensk. Vet.-Ak. Handl., XI, 2, p. Ill, 1873. 



Upolii : — Apia : 1 specimen, 28.X.1923 (Armstrong) ; 2 specimens, 12.ix.l923, 

 1 larva, 13. ix. 1923 (Swezey and Wilder) ; 4 specimens, ii. 1924, 1 specimen, 2. iii. 1924, 



1 specimen, v. 1924, 2 specimens, vi.l924, 2 specimens, 8.ix.l924, 2 specimens, 

 iv.l92o ; Tuaefu : Sliding Rock, 5 specimens, 16.ix.l923 (Swezey and Wilder); 

 Vaea : 1,100 ft., 4 specimens, 25. iv. 1924 (Bryan) ; Vailima : 3 specimens, 

 25.X.1924 ; Lalomanu : 3 specimens, xi.l924 ; Malololelei : 2,000 ft., 2 speci- 

 mens, 12. iii. 1924, 1 specimen, iv.l924. 



Savaii : — Salailua : 2 specimens and 1 larva, 21.V.1924 ; Lowlands to 



I, 000 ft., 3 specimens, 16.V.1924 (Bryan) ; Lower Forest, 1,000-2,000 ft., 1 

 specimen, 17.V.1924 (Bryan) ; Rain Forest, 2,000-4,000 ft., 1 larva, 17.V.1924 

 (Bryan); Safune : 5 specimens, 4.V.1924 (Bryan); Lowlands to 1,000 ft., 2 

 specimens, 30.iv.l924 (Bryan) ; Lower Forest, 1,000-2,000 ft., 2 specimens, 



II. V.1924 (Bryan) ; Tuasivi : 5 specimens, 9.ii.l924. 



Tutuila :— 760-900 ft., 4 specimens, iv.l918 (Kellers); 1,100-1,200 ft., 



2 specimens, iv.l918 (Kellers) ; Pago Pago : 0-300 ft., 4 specimens, iv.l918 

 (Kellers) ; 1 specimen, 10.ix.l923 (Swezey and Wilder), 3 specimens, 12.iv.l924 

 (Bryan), 1 specimen, 14.xii.l925 ; Fagasa : 4 specimens, 9.ix.l923 (Swezey and 

 Wilder) ; Leone Road : 7 specimens, 7.ix.l923 (Swezey and Wilder) ; Amauli : 

 6 specimens, 5.ix.l923 (Swezey and Wilder). 



Manua Is. : — Tau : 6 specimens, 17.ix.l923 (Swezey and Wilder), 1 specimen, 

 27.ix.I923 (Swezey and Wilder). 



Recorded only from Fiji. The sexual dimorphism of the hind tibiae 

 exhibited in the Philippine A. nitidula Stal is absent in this species, the hind 

 tibiae in the male being without a basal thickening. 



Arbela costalis Stal flavicollis, var. n. 



There are three specimens of Arbela costalis in which the posterior lobe of 

 the pronotum is entirely yellow. These I propose to regard as a distinct variety. 



Savaii :— Safune : Rain Forest, 2,000-4,000 ft., 1 $ (type), 8.V.1924 (Bryan) ; 

 Tuasivi : 1 specimen, 9.ii.l924. 



Tutuila : — Pago Pago : 1 specimen, 9.ixJ923 (Swezey). 



* Acanthohrachys (Fieber 1861) Breddin 1905, nec Jekel 1857 (Coleoptera), vide Reuter, Mem. 

 Soc. Ent. Belg., XV, p. 125, 1908. 



