(45) Malcolm Burr. — essai suk les eumastacides. 259 



1. Eumastax tenuis (Perty). 



Statura minore, flavo-virescens. Caput fuscum; fastigium 



ang - ustissimum , tricarinatum ; frons fulva; oecipite nig-ro- 

 maculatum; oculi magmi, nigri; antennae atrse, segmentis 

 basalibus duobus exceptis albidis. Pronotum antice subrectum, 

 postice subrotun datum , disco virescenti , utrinque fascia an- 

 g-usta nigra ornato; cannula media subtili, sulco transverso 

 vix disting'uendo. carinula quoque ante sulcum sinuata obso- 

 letissimo instructum; lobi defiexi fulvi, long-iores quam altio- 

 res, ang-ulo antico rotundato, ang-ulo postico rectang-ulo. Ely- 

 tra et alae perfecte explicata; ilia ang-usta, virescentia, venulis 

 infuscatis, venis radialibus a basi per dimidiam long-itudinem 

 contiguse, dehinc vena radiali postica retrorsum diverg-enti, 

 furcata, area discoidali vena intercalata recta, apice sinuata 

 instructa; hae amplae, hyalinae. Pedes g-raciles, testacei; femo- 

 ra postica testacea, nigro-carinata , genubus infuscatis; tibiae 

 posticae infuscatse, prope basin pallido-annulatae, vel testacea}. 

 Abdomen fuscum vel testaceum; cerci conici, fusci, incurvi; 

 lamina supraanalis margine integro; lamina subg-enitalis pro- 

 funde fissa. 0* *?• 

 Long-, corporis ,-/ 11-13 mm. 9 20 mm. 



— pronoti 1,8-2,5 



— elytrorum 9-11 13 



— femorum posticorum 10.5-12 



Mastax tenuis Perty. Delect. Anim. Brasil. 123, tab. xxiv, 

 fig. 3. 

 Serv. Orth. 750. 1839. 



Burin. 183!). Handb. 11. 653. 



Walk. 1870. Cat. Derm. Salt. iv. 791. 



Gerst. 1888. Mitth. Neuvorp. Rug-en. xx, six, 47 (88). 



Karsch. 1881). Ent. Xacli. xv, 31, & 36. 



Mastax mrescens Westw. 1841. Arc Ent. 1, p. 100. 

 Mastax minuta Bol. 1881. An. Soc. Esp. x. 481. 



Bol. 1884. «Viaje al Pacifico*31. 



Karsch. 1889. Ent. Nach. xv. 36. 



Giglio-Tos. 1898. Boll. Mus. Tor. xm, 11" 311, 88. 



Patria. Brazil, province Piauhiensi (Perty): Brezil (Serv.); 



