NO. 2031. XEW VARIETIES OF ICHNEUMON-FLIES— YIERECK. 361 



antennae 16-jointed, flagel blackish, first joint of the flagel hardly 

 more than two-thirds the length of the scape. 



Allotype. — Essentially as in the type but with the antennae more 

 than 16-jointed and with the apical foramen of the carapace having 

 its greatest diameter at least twice the length of the shortest diameter. 



The above specimens as well as three paratopotypes were collected 

 by Koebele and Branner and bear the following legends, February '83, 

 l-18-'83 No. 70, and 10/2, '83 collected on cotton. Of the paratopo- 

 types there is one specimen only 2 mm. long. A paratype from 

 San Bernardino, Paraguay, bears the label K. Fiebrig S. V. and 

 S. VI, and belongs to the Konigliche Zoologische Museum, Berlm. 



CYANCPTERUS DIVERSUS, new species. 



Type-locality. — Bahia, Brazil, No. 819, Mar€h 14, 1883, xV. Koebele. 



Type.— Cat. No. 16215, U.S.N.M. 



Female. — Length, 10 mm.; agrees with the original description of 

 Ipohracon disparatus Szepligeti except in the mesonotum which is 

 mostly black, in the mesopleurse being reddish above the furrow and 

 in the longer ovipositor which is approximately 3 mm. long; basal 

 area of the second segment triangular, its sides angulate near the 

 middle. 



Paratypes from Asuncion, Paraguay, Cape Laureles, February 4, 

 1906; Cape Oljonpo, December 11, 1904; Villa Morra, December 21, 

 30, 1904; in the Konigliche Zoologische Museum, Berlin, show that 

 this species varies in length to 8 mm. and in color, the mesopleurae 

 being entirely black below* the furrow in one case and the abdomen 

 black or blackish all over in another, the third dorsal segment is uni- 

 formly convex in some cases while in others there is a slight eleva- 

 tion of the tegument at the base in the middle. 



In the punctured apical half of the third segment this species 

 approaches Bathyaulax Szepligeti, as originally described. In the 

 suggestion of a basal area on the third segment it indicates a transi- 

 tion to Digonogastra Viereck. It may be that the males of this 

 species are typical Digonogastra Viereck, this proving to be the case 

 Digonogastra Viereck will have to be reduced to at most subgeneric 

 rank. 



This species may be the same as Bracon semifasciatus Brulle, from 

 which it can be distinguished at least by the reddish and black meso- 

 notum and the shorter ovipositor. 



ERISTERNAULAX, new genus. 



Type. — Eristernaulax leucotsRnia, new species. 



Related to AUotypus Foerster, but tangibly differs in the mesepi- 

 sternum being provided near its lower edge with an oblique foveolate 

 gi'oove extending almost all the way from the anterior to the pos- 

 terior edge of the mesopleurae, in the notauli which are prominent 



