MICKOCENTKUM. 363 



Elytra latissima, submembranacea. Vena principalis valde flexuosa ; vena media illi parallela ac valde 

 propinqua ; ejus rami fere rectangulatim deflexi ; ramus primus per venulam brevissimam cum vena ulnari 

 conjunctus. Femora anteriora et intermedia subtus margine antico spinuloso; posteriora extus tota 

 longitudine, intus a medio remote, spinosa. 



$ . Ovipositor longiusculus, apice valde dilatatus et truncatus. (Brunner.) 



3 . Elytrorum vena media ramos tres, vena discoidalis ramos 2, vena ulnaris ramos 3, transversos formantes ; 

 venae mediae ramus secundus bis angulatim fractus, ejusque angulis per venulam bre^em cum vena ulnari 

 et cum ramo tertio venae mediae conjunctis. Campus discoidalis fasciis 6 in venis transversis positis et 

 apice imo, byalinis ; bae fasciae punctis fuscis nnmerpsis conspersae. Cerci teretes ; apice breviter incurvo, 

 acuto. Lamina infra-genitalis apice carinata et ad carinam utrinque exarata, apice subsinuata ; stylis 

 gracilibus, brevibus, remotis instructa. 



$ . Long. corp. 25 ; pronot. ? ; elytr. 49, lat. 20 ; femor. post. 23 ; ovipos. 7 millim. 



<S . Long. corp. 28 ; pronot. 8 ; elytr. 45, lat. 17 ; femor. post. 21 millim. 



Figures : — Fig. 9, the male insect. — Fig. 10, ditto, from above, showing the structure of the elytron. 

 Hab. Panama, Bugaba {Champion : <s ). — Colombia, Santa Marta {Brunner : $ ). 



The female only was known to Brunner v. Wattenwyl. The male here described 

 also presents peculiar characters in the elytra (hyaline bands and numerous brown 

 spots), and it seems to agree perfectly with the female in this respect. M. colosseum 

 is nearly allied to M. erosum, Brunn., from the Upper Amazons, but may be distin- 

 guished from it by the spinose hind femora. 



13. Microcentrum otomium, Sauss. (Tab. XVII. figg. 11, 12, 6 .) 



Phylloptera {Orophus) otomia, Sauss. Rev. et Mag. Zool. (2) xi. p. 204 (1859). 

 Microcentrum otomium, Brunn. v. W. Monogr. der Phaneropt. p. 342. 13. 



Statura majuscula. Viride. Verticis apex articulo primo antennarum duplo latior, perpendicularis, cum fastigio 

 frontis in lineam arcuatam sinuatam conjunctus. Oculi globosi. Pronotum velutinum, retro dilatatum, 

 margine antico medio subproducto, margine postico arcuato ; disco haud rugoso, sulco postico transverso, 

 recto, subplicato, profundo, utrinque abbreviato ; sulco intermedio nullo ; area postica velutina, haud 

 rugata. Lobi laterales valde altiores quam latiores. Lobi sternales producti, acuti. Elytra coriacea, 

 lanceolata, margine suturali arcuato, vena media longe ante medium venae principalis oriens, flexuosa, 

 prope basin furcata ; ejus ramus anterior indivisus ; ramus posterior fractus vel per ipsum ejus angulum 

 cum vena ulnari per venulam conjunctus. Yena ulnaris recta, apice obtusangulatim fracta, dehinc obliqua, 

 postice ramos 2 obliquos ad marginem suturalem emittens. Femora antica subtus inermia ; intermedia 

 margine antico apice spinulis 2-3 ; postica subtus utrinque fere tota longitudine crassiuscule spinulosa. 

 Tibiae posticae a latere basin versus dilatatiusculae. Cerci d 1 teretes, apice nigro-mucronati. (Color 

 capitis, pronoti, thoracisque in desiccatis, flavescens, elytrorumque margine costali basi eburneo.) 



<$ . Long. corp. 29 ; pronot. 7 ; elytr. 51, lat. 16 ; femor. post. 24 millim. 



Figuees: — Fig. 11, the head of the male, from in front, magnified. — Fig. 12, pronotum, elytron, and wing, in 

 profile. 



Hab. Mexico, Cordova {Saussure). 



14. Microcentrum aztecum, sp. n. (Tab. XVII. fig. 13, 6 .) 



<3 . Statura minore, pallide viride. Verticis apex articulo primo antennarum fere duplo latior, valde declivis, 

 cum fastigio frontis liuea subarcuata conjunctus. Oculi oblongi, elliptici. Pronotum nitidum, retro 

 dilatatum, margine antico sinuato, postico medio arcuato ; disci sulco intermedio angulato, postico parum 

 expresso ; area postica rugulosa, punctata ; canthis lateralibus totis acutissimis. Lobi laterales aeque 

 longi ac alti, postice rotundati, margine infero leviter sinuato, angulo antico recto, hebetato. Lobi meso- 



3Aa 2 



