and Characters of undescribed Species. 381 



Male. — jEneous black, thinly pilose. Head a little broader 

 than the thorax. Eyes prominent. Antennae with long pubescent 

 branches. Scutum transversely striated ; 'parapsides almost smooth, 

 with distinct sutures; scutellum ending in two striated, slightly 

 curved and converging spines, which extend beyond the tip of 

 the abdomen. Petiole much longer than the abdomen. Ab- 

 domen black, smooth, fusiform, much compressed, much shorter 

 than the thorax, and less than half its breadth. 



Villa Nova. Discovered by Mr. Bates. 



Female. — Deep black, slightly pilose. Head very short, a little 

 broader than the thorax ; front with oblique striae on each side. 

 Eyes very prominent. Palpi whitish. Antennae filiform, longer 

 than the thorax ; scape whitish. Thorax gibbous. Prothorax 

 extremely short. Scutum transversely striated, with a purplish 

 tinge; sutures of the parapsides slight; scutellum flat above, 

 longitudinally striated, ending in two slightly curved and con- 

 verging spines, which extend a little beyond the tip of the abdo- 

 men. Petiole linear, slender, striated, as long as the abdomen. 

 Abdomen purplish-black, smooth, elliptical, keeled and whitish 

 beneath, not longer than the thorax and little more than half its 

 breadth. Legs whitish. Wings limpid ; veins whitish ; ulna 

 nearly as long as the humerus ; radius obsolete. 



Length of the body 3 lines ; of the wings 5 lines. 



Santarem. Discovered by Mr. Bates. In the British Museum. 



Thorucantha inexagens. 

 Foem. — ^neo-nigra ; facies substriata ; antennae piceae, filifor- 



mes, basi fulvss ; thorax gibbus ; scutum transverse striatum ; 



parapsidum suturae parallelae ; scutellum sub-laeve, spinis 



duabus striatis sub-arcuatis abdomen pauUo superantibus ; 

 . petiolus brevis, robustus ; abdomen nigrum, altum, thorace 



multo brevius ; pedes pallide flavi ; alae limpidae. 



Female. — .Slneous-black. Head very short, hardly as broad 

 as the thorax; face with extremely minute striae, almost smooth. 

 Antennae piceous, filiform, shorter than the thorax ; scape tawny. 

 Thorax gibbous. Prothorax extremely short. Scutum trans- 

 versely striated ; parapsides almost smooth, their sutures parallel 

 to each other ; scutellum almost smooth, ending in two striated 

 slightly curved spines, which extend a little beyond the tip of the 

 abdomen. Metathorax vertical. Petiole short, stout. Abdomen 

 black, smooth, much higher than long, keeled beneath, much 

 shorter than the thorax, and little more than half its breadth. 



