236 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



ACANTHOSCELIO Ashm., gen. iiov. 

 (Type .(. ((mericoiius.) 



Head lar.ije., siibquadrate. with a tVoutal ledge as in Sparasion^ the 

 occiput rounded, maigiued; ocelli 3, in a triangle, the lateral not quite 

 touching the margin of the eye; eyes very large, rounded. 



Antenna' as in Scelio. 



Maxillaiy palpi 3-joiuted. 



Thorax ovoid, prothorax visible from above, only at the sides; trun- 

 cate anteriorly; mesonotum convex, without furrows; scutellum large, 

 quadrate, the posterior margin slightly arcuately emarginate, the an- 

 gles acute; postscutellum produced into a large erect spine; metano- 

 tum short, abrupt, the angles prominent. 



Front wings with the submarginal vein remote from the costa and 

 curving and joining a punctiform marginal vein at about the middle of 

 the wing; stigmal vein rather long, oblique, with a long radial branch, 

 that forms a long, lanceolate marginal cell. 



Abdomen sessile, oblong-oval, depressed, strongly carinated along 

 the sides and composed of G segments, the first and second nearly 

 equal, the third the longest. 



Legs as in Seelio, the tibial spurs well developed. 



The affinities of this remarkable genus are with Scelio and Sparasion; 

 it agrees with the former in all the essential characters, except in hav- 

 ing a frontal ledge, the structure of the meso- and meta-scutellum, and 

 in venation; with the latter it agrees only in its cephalic characters. 

 It is at once distinguished from both by the shape of the scutellum and 

 the strong erect postscutellar spine, the shape of the scutellum being, 

 indeed, unique in the family. 



The genus is founded upon a male specimen, collected by Mr. Her- 

 bert Smith, at Chapada, in South America, and a female specimen in 

 the Berlin Museum, labeled "Bogota." 



Acanthoscelio americanus sp. nov. 



(Pl.x,Fig.6, <?.) 



$. Lengths™™ Opaque, coarsely rugose; antennae, post-scutel- 

 lar spine, legs, except the black coxae, and the lateral margins of the 

 abdomen, brownish-yellow; wings fuscous, yellowish-hyaline at base. 



Habitat. — Chapada, Brazil, South America. 



Type in Coll. Ashmead. 



Acanthoscelio flavipes, sp. uov. 



9 . Length, 3.4™™. Black, coarsely, deeply punctate ; antenna?, except 

 the 0-jointed club, the i)alpi, the legs, including coxitb, metathorax, first 

 abdominal segment and the lateral margins of the second and third, red- 

 dish-yellow. Head subglobose, as wide as the thorax, Avith a frontal 

 ridge, coarsely rugoso-punctate. Eyes very large, round. Mandibles 



