EUACEIS. 441 



<£ cJ . Cerci teretes, crassi, arcuati, apiee acuminata, unguiculati. Lamina infra-genitalis elongata, subtus 

 valde carinata, basi elevato-lamellari-compressa, marginibus superis valde sinuatis ; ejus pars posterior in 

 processum angustum producta ; stylis foliaceis, lanceolatis, lateralibus. 



This genus is somewhat intermediate between the groups Cocconotites and 

 Cyrtophyllites. It must be included in the Cocconotites as it has the intermediate coxae 

 not tuberculated beneath at the base, and the ulnar vein reaching to the tip of the 

 elytra, but it forms a transition to the Cyrtophyllites by its green colour. In the 

 coloration of the wings Euacris is also intermediate between the two groups, the wings 

 being brown, as in the Cocconotites, but with very differently shaped whitish-hyaline 

 markings. 



1. Euacris pictipennis, sp. n. (Tab. XXI. figg. 3-8.) 



Viridis. Statura magna. Antennae concolores. Pronotum totum verruculoso-scabrum ; metazona postice 

 minus granulata ; lobis lateralibus margine infero in medio leviter arcuato. Elytra angusta, venis 

 expressis. Vena media longe ante medium oriens ; venae ulnares leviter undatae; venulae transversae 

 paucae, invicem valde remotae. Alas quam latiores paulo longiores, disco toto (basi excepta) fusco, campo 

 anteriore et limbo toto, externo, postico, et interno latiuscule albido-hyalino ; campo intermedio plus 

 minus luteo-tessellato, necnon campo anteriore maculis nonnullis fuscis ornato. Femora anteriora et 

 intermedia subtus spinis 7 ; postica multispinosa, basi tantum inermia. Tibiae intermediae margine 

 postico spinis 4-5. 



<j> . Ovipositor rectus, in dimidia parte apicali fusco-rufus, vitta longitudinali viridi ; valvis superioribus 

 superne obsolete granulosis, inferne tuberculis nonnullis instructis ; margo inferior parum arcuatus, 

 superior in medio leviter subangulatus. 



<J. Segmentum anale transversum, in processum minutum quadratum productum. Cerci crassi, teretes, 

 apice arcuato, attenuato, depresso, subtus excavato, in unguiculum acutum nigrum terminato. Lamina 

 infra-genitalis (figg. 6, 7) miraculosa, vix describenda : basi valde compressa, elevato-lamellari-carinata, 

 apice planata, inter stylos producta, rotundata, apiceque in processum angustum excurrens ; hie apice 

 trigonali-dilatatus, truncatus; subtus ante processum terminalem insuper processum alterum in forma 

 floris quadripetalae gerens (figg. 7, 8). Styli (fig. 6, i) in medio margine laterali laminae infra-genitalis 

 exserti, maxime foliacei, basi lati, acutissime lanceolati. 



2 . Long. corp. 41 ; pronot. 10 ; elytr. 52, lat. 11 ; femor. post. 38 ; ovipos. 23 millim. 



J . Long. corp. 37 ; pronot. 9-5 ; elytr. 50"5, lat. 10 ; femor. post. 34'5 millim. 



Figttbes : — Fig. 3, tbe female insect. — Fig. 4, the ovipositor, magnified. — Fig. 5, the apex of the abdomen of 

 the male, from above : s, supra-anal plate ; c, cerci. — Fig. 6. the infra-genital plate, from beneath : i, its 

 basal part, much carinated (comp. fig. 7, i) ; e, its second depressed part ; d, its apical termination ; 

 /, its cruciform inferior process (comp. figg. 7, /, and 8) ; c, styli.— Fig. 7, ditto, in profile, with the 

 same letters: u, the last two ventral segments. — Fig. 8, the corneous appendage (/). terminating the 

 inferior subapieal process, from beneath, much magnified. 



Hab. Costa Eica, Volcan de Irazu, 7000 feet (Rogers). 



The male insect is distinguishable by the extraordinary structure of the anal pieces 

 and cerci (comp. figg. 5-8), which are completely different in form from those of any 

 known species of Locustidse. It will be noticed that the infra-genital plate bears on 

 the underside, near the tip, a small additional process, which, seen from beneath, 

 expands in the form of a Maltese cross : 



biol. CENTK.-AMEE., Orthopt., December 1898. 3 l1 



