398 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxui. 



The term interplical ridge has been applied to the summit of the radial 

 convexities of the wing- and interplical groove the bottom of the alter- 

 nating concavities. (Fig. 4, i? and (r.) For convenience the branches of 

 2d and od A in Plate XXI the wing have been referred to as radiate 

 veins. 



In indicating the relationship of Ti'mierotropix. to the allied genera 

 it has been necessary to characterize two new genera. Metator is 

 based upon Mestobregma pardalina Saussure and will probably include 

 Me^tohrcgma maculosa Saussure. Tr<'j)lduhij< has for its type a new 

 species from San Bernardino, California (Coquillet collection), which 

 may be called Trep'ididns romcevs. 



KEV TO THE .SI'ECIE8 OF TRIMEROTROPIS. 



A^. Tegmina plain isabelline, not banded and with spots? not segregated into groups 

 extending across the wing. Frontal costa^ sulcate as 

 strongly above as below the ocellus, its carin&e continuous 

 with the carinte of the vertex. Pronotum with the disk 

 flat. Area of the cubital forks narrow and with few 

 exceptions occupied wholly or in part by a single row of 

 quadrate cells. Wings always long with the disk greenish 

 yellow or hyaline throughout. Posterior tibiae never blue. 



Agonozoa, new subgenus. 

 u^. Lateral lobes of tlie pronotum with a dentation on the posterior part of the 

 lower border. 

 /<'. Cfoneral color pale testaceous, very plain. Wings transparent without a trace 

 of a fuscous band. Tegmina without bands and with a very 

 few spots restricted almost entirely to the middle field. 

 PovSterior femora light on the inner face with the usual 



black bands obsolete H v alixa group. 



hyalina, new species 

 b'\ General color isabelline. Wings with a definite fuscous band, or at least with 

 plain indications of such a band in the infuscated nerves 

 of the region usually occupied by the band. Pronotum 

 with a definite stripe extending along the sides of the disk, 

 or at least with the edges lighter than the middle. 



Texana group. 

 c'. Prozone of the pronotum bilobate when seen from the side. Median carina " 

 a raised line on the metazone. 

 d^. Process of the metazone acute angulate. Metazone twice as long as the 

 prozone. Fuscous band of the wings broad. Posterior 



tibife dull orange texana Bruner. 



(J-. Process of the metazone obtuse angulate. Metazone not more than one 

 and three-quarter times as long as the prozone. Posterior 

 tibia? obscure greenish. 

 e^. Smaller, male 15 mm., female 22 mm. long. Crest of the prozone 



divided into dentiform lobes rebellls Saussure. 



e'^. Larger, 19 to 23 mm., female 27 to 30 mm. long. Crest of the prozone 

 divided into rounded lobes. 



^ Tnmerotropis coquiJletti has the frontal costa inostly solid abo\'e the ocellus. 



