49 



row, cultrate, thick, convex on both surfaces, or very slightly flattened on 

 inner surface, nine large teeth on hind margin. 



Yellow or light brown, darker between carinae of head and thorax, 

 nearly black between carinae of face, two broken, darker medio-latefal 

 stripes down abdomen. Tegmina hyaline, yellowish, veins, concolorous 

 with membrane, granules small, sparse, with yellow hairs. 



Length 4.6 mm.; tegmcn 1.7 mm. 



One female from Diana's Peak, St. Helena (Wollaston). 



The second specimen nnder this name from the same local- 

 ity represents another species Init is not in good enough con 

 dition to describe. 



Ilburnia simulans (Walker). 



Delphax simulans Walker, List of Horn. Insects II. p. 355 

 (1851). 



Male. Head slightly narrower than thorax; vertex slightly longer 

 than width at base, perceptibly narrowed to apex, carinae normal ; length 

 of face nearly double the width, narrowest between eyes, broadest slightly 

 distad of middle, median carina simple ; antennae reaching to apex of 

 face, terete, first joint about half the length of the second; pronotum 

 tricarinate, lateral carinae straight, diverging posteriorly, reaching hind 

 margin, mesonotum tricarinate. Legs comparatively short, first hind tar- 

 sus sub-equal to the second and third together, spur small, about two- 

 thirds the length of first tarsus, cultrate, thick, both surfaces convex or 

 with the inner surface very slightly flattened, ten small teeth along the 

 hind margin. 



The form of the tibial spur places this species in Ilburnia of the Alo- 

 hini, oherwise it would be best placed in Kclisia. 



Head, thorax and legs light brown, carinae and antennae lighter, 

 abdomen dark brown. Tegmina reaching half way down the abdomen, 

 hyaline, light brown, a dark brown mark at the apex of clavus, slightly 

 brownish over basal area of tegmen. 



Length 2.2 mm. ; tegmen 1.3 mm. 



Two specimens from James Island, Galopagos Islands 

 (C. Darwin). 



Female similar to the male but the abdomen slightly lighter. 

 Length 2.6 mm.; tegmen 1.3 mm. 



Three specimens, one from Charles Island and two from 

 James Island. (C Daniin.) 



