586 PROCEEDINGS OF THE NATIONAL MUSEUM. 



LIBURNIELLA ORNATA Stal. 

 Plate 45, fig. T.; plate 47, fig. E; plate 49, fig. N. 

 Delphax ornata Stal '6;?: 315. 



Liburnia ornata Osborn '9^:127.— Van Duzee '.9.^:191; '.97:247.— Smith '.99:89.— 

 Forbes '6)0:413.— Osborn 'Oi:3G. 



Average length of body 2.1 mm.; to tip of folded elytra 3.9; width 

 of vertex 0.19; width of frons 0.20; antennae, I, 0.15, II, 0.31. General 

 color light brown, abdomen dark brown to black with whitish mark- 

 ings; frons and clypeus between carina? and breast black or dark, 

 frontal carinse pale; with a conspicuous white stripe along median 

 carina of vertex, pronotum and scuteUum lineated on each side nar- 

 rowly with black; legs and antennae pale brown, latter black at tip 

 of I and a black stripe above on II; elytra ornamented conspicuously 

 with brown maculae across apex of corium and around posterior 

 portion of membrane. Body slender. 



Head about as broad as prothorax, strongly carinate; vertex 

 slightly longer than broad, slightly narrowed anteriorly; frons elongate, 

 narrow, sides subparallel; antennae longer than to clypeus, I half as 

 long as II. Pronotum moderately long, roundly emarginate behind, 

 carmae strong; legs typical; hind tibiae longer than femora; calcar 

 small, margin scarcely dentate. 



Male pygofers somewhat compressed, aperture elliptical; anal 

 tube large, short; genital styles rather long, approximate at base, 

 then slightly divergent, acute at tip, cultrate. 



Redescribed from numerous specimens of both sexes from Missis- 

 sippi (Weed), Alabama (Baker), Louisiana, Texas (Tucker), Mis- 

 souri (Baker), Kansas, Pemisylvania, Washington, District of Colum- 

 bia, Massachusetts, Nebraska, Iowa. 



Genus KORMUS Fieber. 



Related to Megamelus at the " Kelisia" end of the series. Head as 

 broad as prothorax; with all carinae and thorax obsolete, or scarcely 

 visible; vertex broad, rounded in front, slightly produced before eyes; 

 frons broad; antennae terete, as long as to clypeus, I shorter than II. 

 Thorax broad. Calcar thick, tectiform, margin scarcely dentate. 



Type of genus. — Kortnus artemisise Fieber. 



Some species in Megamelus at one end of the series resemble some- 

 what this genus, but they have the carinae stiU easily visible. 



KORMUS CALIFORNICUS, new species. 



Length of body 3.1 mm.; width of vertex 0.36; width of frons 0.50; 

 antennae, I, 0.11; II, 0.23. General color dark chocolate brown; 

 apex of head, tip of abdomen, legs and breast paler; brachypterous 

 elytra dark brown. Body robust. 



Head about as broad as prothorax, rounded in front; vertex as 

 broad as long; frons a little longer than broad, convex, sides evenly 



