360 OETHOPTEEA. 



cum angulo apicali venae ulnaris in angulum confluens. Femora antica et intermedia subtus inermia ; 



postica dimidia parte distali spinulosa. 

 5 . Ovipositor haud parvus, valde incurvus, apice potius attenuatus, margine infero regulariter arcuato. 



Lamina infra-genitalis elongato-trigonalis, apice rotundato, basi sulcata, 

 c? . Minor. Yerticis apex paulo angustior. In elytris, venae mediae ramus primus cum vena ulnari nonnun- 



quam haud confluens, sed per venulam brevissimam conjunctus. Cerci parum arcuati ac longi, apice 



breviter incurvo, acuminato ; unguiculo nigro arcuato. Lamina infra-genitalis compressa, acute incisa, 



stylis longiusculis subcompressis instructa. 

 2 . Long. corp. 27*5 ; pronot. 7*5; elytr. 47; femor. post. 26*6; ovipos. 5 millim. 

 J . Long. corp. 22 ; pronot. 5-7 ; elytr. 36-5 ; femor. post. 21-5 millim. 



Hal). Antilles, Martinique. 



This species is allied to M. pallidum, Brunn., from which it may be separated by 

 the unarmed anterior femora and the somewhat differently shaped elytra, the posterior 

 margin of the latter being arcuate and the median vein anastomosed at its angle with 

 the ulnar vein.] 



5. Microcentrum championi, sp. n. (Tab. xvi. fig. 30, e .) 



Lsete viride. Apex verticis articulo primo antennarum duplo latior, subhorizontalis, planiusculus, sulcatus. 

 Frons subtiliter sparse punctata; ejus fastigium primo articulo antennarum duplo latius, superne 

 rotundato-bilobatum. Oculi globosi. Pronotum supra velutinum, planum, retro parum dilatatum ; 

 margine antico in medio subdentato, postico valde arcuato, sulco postico vix nullo. Lobi laterales 

 latiusculi, punctati, rectangulatim inserti, canthis hebetatis. Lobi sternales producti, acuti. Elytra 

 coriacea, nitida, lata. Vena media elongata, longe ante medium oriens, apice angulatim curvata, a vena 

 principali modice remota et illi parallela ; ejus ramus secundus cum vena ulnari angulatim confluens ; 

 vena ulnaris flexuosa. Femora antica subtus inermia ; intermedia margine antico 2-3-spinulosa ; 

 postica in utroque margine spinosa. — c? . Cerci longi, teretes, apice leviter incurvi, margine apicali 

 brevissime compresso, nigro. Lamina infra-genitalis apice incisa. (In desiccatis pronotum vitta trans- 

 versa lutea, elytrorumque margo costalis a medio luteus.) 



Long. corp. 32 ; pronot. 9 ; elytr. 44, lat. 15 ; femor. post. 25 millim. 



Hab. Panama, Bugaba (Champion). 



This species has some of the characters of M. retinerve, but the vertex is broader, 

 not inclined. In M. retinerve the pronotum is marked by two strong sulci cutting 

 the edges ; the elytra are much more reticulated, more membranaceous, not hard and 

 polished ; and the spines of the hind femora are not so strong as in M. championi. 

 The present insect is also very closely allied to M. punctifrons, but it is larger ; the 

 forehead and pronotum are not strongly punctured ; the venulation of the elytra is 

 different, the median vein having the second branch anastomosed at its angle with the 

 ulnar vein ; and the pronotum has rather more acute edges, its anterior margin having 

 a sort of tooth. From M. concisum it may be distinguished by the narrower vertex. 



6. Microcentrum punctifrons, Brunn. 



Microcentrum punctifrons, Brunn v. W. Additam. zur Monogr. der Phaneropt. p. 181. 15. 



Species distincta. Frons valde punctata. Pronoti canthi subaeuti, leviter rotundati, sicut discus punctati ; 

 lobi laterales etiam crasse punctati. 



