214 OETHOPTERA. 



The two inferior valvulae of the anus (visible in fig. 10) bear the anal appendages {a 10). Under these 

 organs are visible the four corneous valvae of the short ovipositor, which have been separated from each 

 other : the two inferior valvae (8 u) formed by the membranous appendix of the 9th ventral segment ; and 

 the two superior valvae (9 b, 9 0) formed by the appendix of the 8th ventral segment. — Fig. 9. Shows the 

 same parts seen from the side — 8 i, the infra-genital plate, an appendage of the 8th ventral segment. — 

 Fig. 10. Shows the same parts seen from above as in fig. 8, but opened and dissected. The three parts of 

 the 10th dorsal segment are removed from each other ; the basal part (s) surrounding the base of the 

 cerci is parted in the middle ; the median part (the true supra-anal plate or telson) is opened, and shows 

 its real ovoid shape. The anal appendages (a), removed outwards, show at the base the inferior valvulae 

 of the anus ; they appear as if biarticulated, but they are only incompletely so ; i, the intestinal tube. — 

 Fig. 11. The same parts as in fig. 8, seen from below, the four valvae of the ovipositor being separated. — 

 Fig. 12. The extremity of the abdomen of £he male seen from the side : 9?, the 9th ventral segment or 

 infra-genital plate. — Fig. 13. The same as fig. 12, seen from above : vs, the supra-anal plate (separated 

 into three parts). — Fig. 14. The same as fig. 12, seen from beneath. — Fig. 15. The head of the female 

 seen from in front. — Fig. 16. The head of the male, to show the curious swelling which occupies the 

 face between the antennae. — Figg. 17-19. The parts of the mouth : 17, labium ; 18, part of a maxilla ; 

 19, mandible. 



Hah. Mexico, Oaxaca (Saussure). 



The following forms are difficult to separate from this, and they may perhaps be 

 regarded as mere varieties. R. mexicana is somewhat smaller and more slender than 

 either of them, and it has the posterior metatarsus a little longer ; except this difference, 

 which may be due to the fact that our typical specimens are from a more northern 

 region (plateau of MexicoJ, the following differ from each other only by their 

 coloration : — 



8 a. R. fkaterna, n. n. — R. mexicance simillima at paulo major ; nigra, citrino-picta. Pedes antici latere 

 interno flavicante ; tibiae posticae subtus, calcaribus supra, flavidis. Metatarsus posticus crassior, magis 

 fusiformis, calcaribus paulo brevior. — Var. Antennarum pictura leviter variabilis. 



Var. rufescens. Color insecti toti ad rufum vergens, vel ipse omnino rufus, picturis tamen illis typi similibus. 



Antennae rufae, articulis intermediis luteis. — Long. corp. 5-3, cum alis 6-7 millim. 

 $ . Facies ut solitum plana, utrinque macula flava. 



cJ . Facies (fig. 16) vittam transversam tumidam, scrobiculatam flavam, obferens, impressionibus 3 nigris. 

 (Frons inferius ad scutellum faciale prominula, utrinque per impressionem vel sulcum infra-ocularem 

 delineata, in medio margine pago minimo subexcavato. Scutellum faciale superne vitta transversa tumida 

 flava subtus utrinque sinuata, in medio leviter producta ac impressione nigra notata.) 



Hob. Mexico, Atoyac in Vera Cruz (II. H. Smith, Schumann), Orizaba (F. D. 

 Godman) ; Guatemala, Purula in Vera Paz (Champion). 



8 b. E. tricolor, n. n. — R. mexicance staturae et illi formis simillima, pictura tamen valde discrepans : — Nigra, 

 antennae ejusdem picturae quam in R. mexicana. Palpi, orbitae partim, maculaque utrinque faciei, albidi. 

 Pronotum circumcirca albido-limbatum, vitta longitudinali postice incompleta rufo-aurantia. Elytra 

 angustissime alarumque campus opacus subtiliter, luteo-limbata. Pedes aurantiaci, genibus intermediis, 

 tibiis 1, 2 apice, nee non tarsis, nigris. Coxae 1, 2 antice luteae vel luteo-maculatae. Femora postica in 

 concha vitta arcuata nigra ; tibiis et tarsis flavis ; metatarso quam calcaria leviter breviore. Appendices 

 anales primo articulo gracili, secundo ovato, apice puncto nigro. — <$ . Facies infra antennas vitta trans- 

 versa scrobiculata flava. — Long. corp. 5-6, cum alis 6-2 millim. 



Yar. a. Tibiae 1, 2 apice haud nigrae. — b. Pronoti discus immaculatus. Tibiae intermediae subtus nigro- 

 limbatae. Femora postica apice maculis 2 nigris. — c. Abdomen subtus rufescens. 



Var. saltator. — Pronoti discus immaculatus. Antennae totae nigrae, articulis 2°-4° flavo maculatis. (Costa 

 Rica.) 



