394 PROCEEDINGS OF THE NATIONAL MUSEUM. 



f ' Intercalary vein considerably or much in advance of the middle of the 

 median area distally, with a single row of cells on either side. Color- 

 ation of the wings-and tegmina very like Hipplscus (Plate XXI, fig. 3). 

 Size, medium or large. Posterior femora unusually slender. 



Metator new genus. 



f ^ Intercalary vein but little in advance of the middle distally, 1)ordered 



t)y several rows, at least posteriorly, of irregular cells. Coloration of 



tegmina similar to Conozoa (Plate XXI, fig. 5) or Deroimeiiia (Plate 



XXI, tig. (5), but never recalling Hippiscii)^. Posterior femora not 



uimsually long. Size, small or medium Mc'ftobregnia Scudder. 



e- Head not at all swollen but very strongly elevated above the disk of the 

 pronotum. Cranium between the eyes much less than their diameter 

 seen from abo\e. Eyes very prominent, in the male, at least, longer 

 than the genal groove. Median carina of the pronotum linear except 

 in front of the first sulcus. Wings transparent, rosaceous at the base, 

 hyaline Ijeyond with no trace of a fuscous band . . Trepidnlus new genus. 



d'* Posterior angle of the lateral lobes of the pronotum broadly rounded and 

 not extended backward and downward so as to make the lower 

 margin straight. Cranium between the eyes with a transverse carina. 

 Crest of the prozone of the pronotum very high and strongly bilobate 



or bidentate Derotmema Scudder. 



b'^ Intercalary vein decidedly curved distally where it is nmch in advance of the 

 middle of the median area (Plate XXI, fig. 1 /), which is occupied 

 almost entirely by a reticulation of irregular cells. Scutellum of the 

 vertex as long as and general!}' longer than broad. Median carina of 

 the ijronotum cut by the principal sulcus mui'h in front of the middle 

 so that the metazone is at least one and a half times as long as the 

 prozone. 

 c ' Pronotum with the median carina cristate on the metazone or at least as high 

 as on the prozone. Tegmina with two solid dark spots alternating 

 with two light spots, the former about the end of the first and second 

 quarters, the latter just beyond, all confined to the anterior half of 

 the tegmina ( Plate XXI, fig. 5 ) . Posterior angle of the lateral lobes of 

 the pronotum extencUng downward so as to make the lower border 



nearly straight Conozoa Saussure. 



c'' Pronotum with the median carina linear or slightly cristate on the metazone 

 but generally less elevated than on the prozone. Posterior angle of 

 lateral lobes of the pronotum well rounded or with a downward jiro- 

 jecting tooth. 



d^ Radiate veins (branches of second and third A) of the anal field of the 

 wings not swollen, so that they are not much larger medianly than 

 near the base Trimerotropis Stal. 



d ^ Radiate veins much swollen, so that they are much stronger medianly than 

 near tlie base (Plate XXI, fig. 4); wings short and broad and fre- 

 <]uently strongly lobate on the outer border (Plate XXI, fig. 4). 



CinvMtiv Scudder. 



a" Less than half of the cells of the distal half of the middle field of the tegmina 



regularly quadrilateral. Inner edge of the fuscous band much Ijeyond 



the middle of the wing Iladwiettiv Scudder. 



Tr'uneTotrojns mti}^ be brieflj^ defined as follows: Head of moderate 

 size, slightly exceeding the prozone in v^idth, but always exceeded by 

 the metazone, which is considerabh" expanded. Antennae filiform, of 

 variable length. Eyes rarely equal to the genal groove. Frontal 



