363 



Types. — Two females on a tag, male and female head, 

 antennae, and hind legs on a slide. # 



ACANTHENTEDON, n. g. 



9 . Head wide, very transverse, wider than the thorax, 

 the occiput concave; eyes large. Pronotum short, produced 

 semi-acutely laterally in the form of a stout tooth ; scutum 

 large, the parapsidal furrows complete but not distinct on 

 account of the coarseness of the sculpture, just in front of 

 the tegulae and far laterally is a short blunt projection; 

 scutellum large, convex, without grooves ; axillae abruptly 

 declivous, scarcely advanced ; propodeum from lateral aspect 

 situated much below scutellum, rather long, with a median 

 carina bounded by sulci and a long sulcus or groove running 

 obliquely from anterior margin just inside spiracle to lateral 

 margin near apex of median carina. Propodeum covering 

 petiole and base of abdomen, the abdomen thus appearing 

 sessile, the petiole visible only from the side, inserted 

 perpendicularly; body of abdomen almost flat above, faintly 

 convex beneath ; pointed long-conical but only slightly longer 

 than head and thorax united ; segment 2 occupying less than 

 one-fourth of surface, its posterior margin gently convex, 3 

 shortest, 3-7 gradually lengthening, 7 almost as long as 2, 8 

 slightly shorter. Mandibles deeply bidentate. Forewings 

 ample; submarginal vein distinctly broken ; marginal vein 

 long, the stigmal very short, the postmarginal scarcely 

 developed. Antennae 10-jointed, scape, pedicel, three ring, 

 three funicle, and two club joints, ring joints small; funicle 

 joints all longer or as long as wide; club with a short terminal 

 nipple. 



This genus seems distinct from any of the many 

 Australian genera recently described by Girault. Of the 

 genera of the tribe with three ring and two club joints, 

 Pleurotropomyia, Girault, Zaommomentedon, Girault, and 

 Horismenella, Girault, bear a median sulcus on the scutum ; 

 Pseudacrias, Girault, Omphalentedon, Girault, Pleurotrop- 

 popis, Girault, and Epentedon, Girault, bear true lateral 

 carinae on the propodeum; and Entedonella, Girault, has a 

 median carina only without any lateral sulci. Like Uracrias, 

 Girault, of the Pediobini, but the parapsidal furrows present, 

 lateral sulci of propodeum not continued along posterior 

 margin. The wide head, acute pronotal angles, and the long 

 pointed abdomen will serve to distinguish the genus from its 

 allies. 



ACANTHENTEDON LATICEPS, 11. Sp. 



9 • Length, 2*50 mm. Dark metallic-green, the 

 propodeum bright blue-green ; abdomen dull purple, segments 



