572 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



short, seldom longer than width of head between antennal sockets. 

 Pronotum tricarmate, lateral caruase flexed out behind eyes and 

 abruptly angulate apically and reaching hind margin; scutellum 

 tricarinate; elytra setigerous on veins, large, broad at apex. Legs 

 long; calcar cultrate, with a row of 6 to 10 teeth on hind margin. 



Type of genus. — Stohaera tricarinata Say. 



Stal erected this genus in 1859 for the species Deljphax concinna,^ 

 a Mexican species. This is beyond doubt identical with DelpTiax 

 tricarinata Say (1829) and therefore, the type of Stohaera must be 

 tricarinata Sa3^ Van Duzee, in describing this genus, ascribed to it 

 the character of the head being narrower than pronotum which is 

 seldom the case in the type species and almost never in the southern 

 forms previously known as concinna Stal. Stal's African genus, 

 AmUycotis, is apparently closely related to some of the members of 

 this genus, notably S. pallida Osborn. 



Fowler's Central American genus, Goniolcium, is apparently identi- 

 cal with Stohaera, judging from his description. 



KEY TO THE SPECIES. 



fl'. FronB rectangular, Bides subparallel; vertex only slightly broader than long or 

 square; antennae compressed; caringe strong; frons usually dark above and be- 

 low, light between, markings variable, 

 fc'. Elytra long, pale, with a brown, crescent-shaped band apicstlly . .tricarinata Say. 

 b^. Elytra short, entirely brown, except anterior margin narrowly hyaline. 



nigripennis, new species. 

 a^. Frons not rectangular, broadened midway; A^ertex broader than long. 



6^ Antennas compressed, short; frons considerably broadened, narrowed below, with 

 numerous short, transverse, white markings; vertex much broader than long; 

 head sometimes broader than mesothorax; carinse strong; elytra long, square 



at apex pallida Osborn. 



b^. Antennae only slightly compressed, almost terete; frons not greatly broadened, 

 pale; vertex broader than long, weakly carinate; fourth abdominal tergite 

 with two black tubercles on each side; elytra short, not covering abdomen. 



quadriptistulata Van Duzee. 



STOBAERA TRICARINATA Say. 



Plate 45, figs. I-K, O; plate 49, fig. K. 



Delphax tricarinata Say '25: 337.— LeConte '59: 255.— Uhler '75: 352.— Van 



Duzee '90: 389.— Osborn '92: 127. 

 Conomelus tricarinatus Van Duzee '97: 191. 

 Stobaera tricarinata Van Duzee '97: 245.— Smith '99: 89.— Osborn '00: 64. — 



Forbes '00: 413. 

 Stobaera bi/ascmta Provancher '90: 337.— Van Duzee '97: 244. 

 Stobaera concinna StAl '59: 327.— Van Duzee '97: 246. 

 Stobaera minuta Osborn '05: 376. 

 Stobaera affinis Van Duzee 08: 99. 



Average length of body 3.4 mm.; width of vertex, 0.31; width of 

 frons 0.26; length of antennse, I, 0.22, II, 0.42. General color 



I Berl. Ent. Zelt., vol. 3, 1859, p. 327. 



