48 



On the Genus Hburnia White (Homoptera, Delphacidae), 



BY V. Ml' IK. 

 (l^KKSKNTKD IJV W. :\r, (ilFFARP.) 



Ilhuniia White 1878, Proo. Zool. Soc, Lond. p. 471. sub- 

 iienius of Lihurnia Stal. 



Ncsosydnc Ivirkaldy 1!>(»7. Piw. Haw. Ent. Soo. I. ]>. KU. 



Ill the l^i'itisli JMuseum collection there are two female 

 spec'iniciis iiiider the name of IJhurnia ignobUis White, col- 

 lected by Wollaston on Diana's Peak, St. Helena. The type 

 is in good condition but the second specimen, which is smaller 

 and darker and re])resents another species, is withont teii-mina. 

 The shape of the tibial spnr places them among the Alohini 

 and there is no structural difference to separate them from 

 NcsosijiJnc Kirkaldy. DcJphcur siniulans Walker, collected by 

 Darwin in the Galopagos Islands, also has to come into the 

 same gciius althong-h it is not quite typical. This makes the 

 present known geographical distribution for this genus, Hawaii- 

 an Islands, with many species, Galopagos Islands, with one 

 species, and St. Helena, with two species, I. ignohilis White 

 and /. simulans (Walker) are redescribed below. 



Fnfortnnately the name NesosydnCy so well known to our 

 local ('oll(H*tors, will liavc' to give ])lace to TU)urnht. 



Ilburnia ignobilis White. 



I lead nuu-li narrowrr than thorax; vortex slightly lonsor than width 

 of the l)asc, apex narrower than liase; length of face a little more than 

 twice the width, slightly narrowed between the eyes, median carina sim- 

 ple; clypeus tricarinate; antennae long, reaching to apex of clypeus, 

 terete, joints suhequal in length, second slightly thicker than the first. 

 Pronotum and mesonotum tricarinate, lateral carinae of pronotum diverg- 

 ing, straight, reaching hind margin. Tegmina not reaching to the middle 

 of abdomen, truncate at apex. Legs long, slender, first hind tarsus longer 

 tlian second and third togetlier. si)ur nearly as long as first tarsus, nar- 



Proc. Haw. Knt. Soc, IV, Xo. i. Tune, 



1919. 



