538 FAUNA HAWAIIENSIS 



(i) Nysius mauiensis Blackburn. 



Nysius mauiensis Blackburn, 1888, P. Linn. Soc. N. S. W. (2) iii. 



I have identified a number of specimens as this species, but am hampered by the 

 fact that I do not know N. arboricola, with which Blackburn compares it. The length 

 of the labium is not stated, but I suppose it to be as in A^. arboricola. 



This species seems somewhat variable, the antennae being feebly ringed, con- 

 spicuously so, or almost entirely fuscate ; the tegmina are in some specimens principally 

 pale, in others principally dark. 



Hab. Maui, Haleakala, 4500 ft. (Blackburn), 5000 ft. (Mar., Apr., Perkins). — 

 Lanai, 2000 ft. (Jan., Sept., Perkins), 3000 ft. (Feb., Perkins). — Hawaii, Kona, 4000 ft. 

 (Aug., Perkins); Kilauea, 4000 ft. (Perkins). 



(2) Nysius arboricola White. 



Nysius arboricola F. B. White, 1878, A. M. N. H. (5) i. 368. 

 I do not know this species. Blackburn took it "high up in the mountainous 

 district," i.e. of Oahu, probably Mt. Tantalus. 



(3) Nysius whitei Blackburn. 



Nysius whitei Blackburn, 1888, op. cit. 346. 



This was obtained from Hawaii, Mauna loa, abt. 4000 ft. (Feb.). I do not 

 know it. 



(4) Nysius longicollis Blackburn. 

 Nysius longicollis Blackburn, 1888, op. cit. 344. 

 This was obtained on Oahu. I do not know it. 



(5) Nysius dallasi White. 

 Nysius dallasi F. B. White, 1878, op. cit. 367. 



This was taken on Oahu, near Nuuanu Pali. It is probably an introduced form 

 near N. delectus, but I have been unable to determine it, though it may be the species 

 I incorrectly, according to Dr Bergroth, determined previously as A^. vinitor Bergroth. 



(6) Nysius delectus White. 



Nysius delectus F. B. White, 1878, op. cit. 367 ; Kirkaldy, 1907, P. Haw. 

 E. S. I. 152. 



An introduced form, widely distributed ; near the coast it is common on 

 Bidens pilosa. 



Hab. Apparently on all the islands at almost all elevations ; not arboreal. 



