158 f-'^''^'^' 



A NEW OENUS OF EUSTHENIN^. 

 BY E. BERGROTH, M.D. 



Mr. E. Sikora, who is now so successfully collecting in Madagascar, 

 has recently sent me a new genus of the JEusfhenince {Tessaratomincd) , 

 which is a new addition to the many aberrant Hemiptera of this island. 

 It cannot be properly placed in any of the five sections of this sub- 

 family, as defined by Stal (Enum. Hem., i, p. 60), but may, notwith- 

 standing the presence of three distinct basal areas of the membrane, 

 be included in the Haplosternina {Cyclogastrina, Stal). It differs, 

 however, so widely from the other four genera of this section, Haplos- 

 terna, Westw., Natalicola, Spin., Lipli(Bmus, Stal, and Gyclogastridea, 

 Eeut., as to render a comparison with them unnecessary. 



PL4TYTATUS, oiov. gen. 



Corpus ovatum, granulatum, et supra et subtus valde deplanatura. Caput 

 triaugulare, horizontale, lateribus ante oculos levissime sinuatis, ocellis ab oculia 

 atque a linea media capitis subseque longe distantibus, jugis acuminatis tylo paullo 

 lougioribus, apice libera prominulis, tuberculis antenniferis prominentibus, insertione 

 antennarum a supero apparente, his quinque-articulatis, articulo primo incrassato, 

 apicem capitis subattingente, articulo tertio brevissimo, annuliformi, bucculis fere 

 percurrentibus, modice elevatis, rostro longo, gracili, post coxas posticas longius ex- 

 tenso, articulo primo bucculis vix longiore, secundo longissimo duobus ultimis unitis 

 multo longiore, coxas medias subsuperante, tertio quarto paullo breviore. Pronotum 

 apice sat profunde sinuatum, lateribus rotundatum, basi retrorsum baud productum, 

 margine apicali leviter calloso-elevato, marginibus lateralibus leviter explanatis et 

 subreflexis, margine basali late levissime subrotundato, angulis anticis rotundatis, 

 latei'alibus obtusis non prominulis, posticis deletis. Scutellum triangulare, sequila- 

 terum, apicem segmenti secundi connexivi baud attingens, apice breviter spathulato- 

 producto, frenis fere ad apicem scutelli extensis. Prosternum medio planum, baud 

 sulcatum ; mesosternum prosterno medio dimidio longius, sulco lato medio profundo 

 instructum et in fundo sulci iterum anguste sulcatum ; metasternum medio pro- 

 sterno paullo longius, sexangulare, baud elevatum sed leviter concavum, orificiis 

 brevibus, marginibus in cochleam intortis. Corium scutello multo longius, margine 

 costali, ante medium obtuse angulato, ante angulum leviter explanato-reflexo, mar- 

 gine apicali levissime subrotundato ; membrana cellulis basalibus tribus oblono-is 

 contiguis instructo, his cellulis venas simplices sex vel septem emittentibus, una 

 alterave harum venarum interdum furcata. Abdomen hemelytris latius, angulis 

 posticis segmentorum leviter prominulis, ventre medio late leviter sulcato, sulco pone 

 segmentum quartum evanescente, segmento secundo medio tuberculo destituto, 

 spiraculis paullo ante medium segmentorum positis, a margine laterali quam a 

 margine postico vix longius distantibus. Pedes granulati, medii quam postici paullo 

 latius distantes, postici quam anteriores longiores, femoribus omnibus nonnihil in- 

 crassatis, inermibus, tibiis compressis, subtriquetris, tarsis biarticulatis. 



