1^15. REVISION OF THE GENUS TRIMEROTROPIS—M^'NEILL. 395 



rosta contracted below the ocellus and at the vertex. Sulfate alwaj's 

 below and sometimes above the ocellus. Scutellum of the vertex ncn'er 

 much shorter and g-enerally longer than ))road, usually plainly suleate 

 with or without a median carina. Central foveoliB generally distinctly 

 separated from the frontal costa and the scutellum of the vertex. Lat- 

 eral foveolfB distinct and triangular. Pronotum with the disk only 

 moderately wrinkled on the prozone and quite smooth on the meta- 

 zone, except for granulations. Median carina cristate or rarely only 

 a raised line on the prozone, less elevated on the metazone, especially 

 posteriorly; cut by the principal sulcus nuich in advance of the middle, 

 so that the metazone is from one and a half to more than twice as long 

 as the prozone, and by the iirst sulcus behind the middle of the pro- 

 zone. Shoulders well marked, liut lat(M"al carina^ visually absent except 

 occasionally on the front of metazone and prozone. Process of the 

 metazone acute, right, or obtuse-angular with the sides sinuate, arcu- 

 ate, or straight. Lateral lobes with the posterior boi'der straight or 

 slightl}" siimate and nearh' vertical, lower border sinuate anteriorly 

 and arcuate posteriori}^ with the posterior angle well rounded or less 

 conuuonlv with a dentation extending downward. 



Tegmina plain; isabelline or maculate; in the last case the spots 

 are annular or solid and pretty evenly scattered over the whole sur- 

 face or much more freciuently arranged in three well-marked groups, 

 one each at the end of the first and second quarters and one on the 

 distal third. The first two are generally much better defined than the 

 last and may become solid ])aiids, as in IIadrotetti,r. The intercallary 

 vein is curved forward distally, where it is always much closer to 21 

 than to Cu (Plate XXI, fig. 1, /). Area J/^ is filled with a reticulation 

 of irregular cells, i?., has from two to five branch(\s, separated by 

 spurious veins, which are bordered on either side by quadrilateral cells, 

 which become irregular and smaller near the middle of the tegmina. 

 J/j & 2 ^^^ ^^z & i '11'*? present without branches. (J>/i has one or two 

 anterior accessory branches. Wings sometimes hyaline, but usually 

 colored yellow, green, or blue at the base, hyaline at the apex, with a 

 fuscous band between, varying in width from one-eighth to two-thirds 

 the length of the wing. This fuscous l)and may include more or less 

 completely the whole outer part of the wing, and it always has a sub- 

 marginal spur which extends inward toward the base, and it is gen- 

 erally continued around the posterior margin to or toward the posterior 

 angle. ^., is ahvays present, and has one or two branches (Plate XXI, 

 fig. 2). J/j &2 and Jlf^&i are present and eml)ranched, as in the t(\g- 

 mina. C\ and Isf A are simple. 2d A^ is unusually prominent, and 

 runs near the middle of the second lobe, where it is accompanied by 

 ?'/ A,, which has one slender branch occupying the first interplical 

 uioove and one strong branch, which forms the axis of th(> third fold 

 and is the second interplical ridge, as the branches of Jd ^L form the 



