92 AMERICAN HYMENOPTERA. 



Thorax with the dorsum slightly leathery, not shining ; mesothorax 

 oblongate, in the female trilobate, pleurae with a raised ridge ; scutel- 

 lum elongate-triangular, almost entirely emarginate, punctate ; meta- 

 thorax gradually sloping towards the apex, finely rugose, spiracles elon- 

 gate, located near the base. 



Abdomen compressed ; first segment straight, a little shorter than 

 the thorax, postpetiole nearly half as long as the petiole ; the second 

 segment about equal in length to the first, towards the base slightly 

 curved ; the remaining segments compressed, pubescent, noticeably 

 shorter ; ovipositor very short. 



Wings moderately broad ; externalradial well curved, internal incras- 

 sate before the base ; discocubital cell with two membranous maculae — 

 yellow in the female — of which the interior is somewhat larger, sub- 

 triangular, the exterior large, circular ; the transverse discoidal vein 

 broken, the anal below the middle, the latter giving off a distinct vein 

 from the fracture ; the interior cubital vein interstitial, very little curved. 



Feet slender ; tarsal claws thickly and distinctly pectinate. 



Female. — Head entirely fiavous ; antennae rufous, apex ferruginous ; 

 thorax rufous, pleural sutures pale; abdomen rufous, segments 4 to 7 

 more or less fuscous. Wings hyaline, stigma and membranous maculae 

 flavous; radix and squamula rufous. Feet fulvorufous. 



Male. — Similar to the female, but the apex of the abdomen not fuscous. 



I have not seen a specimen of this species, and can only 

 give a free translation of the original description. 

 Types. — 9 and cf. Location unknown. 

 This species has hitherto been retained in the Genus 

 Ophion, but the thickening of the base of the radial vein and 

 presence of maculae place it at once in the Genus Enicospilus. 

 The description, though long, is a little indefinite, and it has 

 not been referred to since the original description except in 

 catalogues. 



Distribution. — Buenos Ayres, Argentina. 

 Genus OPHIOPTEKUS Br. 



Ophiopterus Brulle, Hist. Nat. Ins., Hym., IV, p. 153 1846. 



Cresson, Proc. Acad. Nat. Sci. Phila., p. 380 1873. 



" Cameron, Biol. Centr. Amer., Hym., I, p. 296 1886. 



Ophionopterus Ashmead, Proc. U. S. Nat. Mus., No. 1206, pp. 



87, 180 (Vol. 23, 1901) 1900. 



Ophiopterus Dalla Torre, Cat. Hym., Ill, p. 180 1901. 



Szepligeti, Gen. Ins., Hym., 34me Fasc, p. 37 1905. 



Schulz, Spolia Hym., p. 96 1906. 



" Schmiedeknecht, Opusc. Ichn. Fasc, XVIII, p. 1424, 



n. 81 1908. 



