MEXICAN IIYMENOPTERA. 27 



l)roadly dilated; basal foveae of second segment very deep and sub- 

 transverse. Length 5 — SV lines. 



Two 9 specimens. (Sumichrast Coll. No. 23.) Easily distinguished 

 by the bituberculate scutellum. 



(EDICEPHALUS, u. gen. 

 This genus (or probably subgenus) is formed to receive Trot/m ? 

 a/hovarius nob. from Cuba, and three species from Mexico, possessing 

 apparently constant structural characters of generic value. The head 

 is unnsually large and SiroUen, verif hroad behind the ei/es, the occipnt 

 deepJtf cmarr/inafe, mandibles very broad, antenna; generally longer 

 than the body, thorax very robust; scutellum very broad, subquadrate, 

 unituberculate, more or less prominent; metathorax short and broad, 

 broadly and rather suddenly truncated behind, lateral tubercle very 

 small or altogether wanting; wings long, areolet 5-angular ; legs long, 

 more robust than usual, posterior tibife incrassate toward the tips, the 

 inner spur longer than usual ; abdomen short, ovate in 5 , subdepressed, 

 petiole slender, apex of first segment very broadly dilated, basal fovete 

 of second segment broad, transverse and veri/ deej), this segment is gen- 

 erally longitudinally aciculate ; ovipositor exserted about the length of 

 petiole of abdomen. Seems to be intermediate between Hoplismena^ 

 and Jojypa. 



1. (Edicephalus longicornis, n. sp. 



9 . — Black, shining, with an opaline iridescence ; face, clypeus, man- 

 dibles except tips, palpi, anterior orbits, ending in an ovate spot at 

 summit of eyes, cheeks, broad annulus on antennae, collar, short line 

 before teguloe, two short lines on disk of mesothorax, sides of scutel- 

 lum, an oblique line on each side before, tegulte, transverse line at base 

 of metathorax, two large marks behind, a broad longitudinal mark on 

 flanks, two spots beneath wings, pleura beneath and extending for a 

 short distance up on each side, all white; wings hyaline, nervures and 

 stigma black ; legs yellow, cox« whitish, spot at tip of posterior pair, 

 their trochanters, line on all the femora above, line on outside of four 

 anterior tibise, the posterior pair except tips, and the four anterior 

 tarsi, black; abdomen black, petiole, narrow apical margin of first seg- 

 ment, basal fovese of second, broad apical margins of this and the fol- 

 lowing segments and the venter except base, yellowish-white ; apical 

 segments above and venter with long, thin, black pubescence. A trans- 

 verse, interrupted carina beneath ocelli; antennae longer than body, 

 slender, slightly thickened near tips; mesothorax sparsely punctured ; 

 scutellum with a long subacute spine, the lateral margin carinate ; meta- 



