64 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



subdorsal expanded anteriorly, the expanded part smooth, punctate 

 only along its upper margin; the black areas of meso thorax coarsely 

 but not very closely punctate; sides of thorax with a broad-margined 

 black triangle, which would be open on the inferior posterior side 

 but for a large black patch placed before the opening; scutellum 

 honey-yellow; metathorax broadly black at base, with also a broad 

 black median band, expanded apicall}^, and the sides broadly black; 

 wings strongly brownish, the apices dilute fuliginous, areolet large and 

 transversely elongate, briefly petiolate; anterior and middle legs light 

 ferruginous, yellow basally; hind legs with the first trochanters 

 black, ferruginous at the pointed apex above, second trochanters 

 ferruginous above and broadly yellow beneath; femora very black, 

 except at apex and extreme base, but a dark red narrow stripe 

 above and most of the under side broadly dark red, the single tooth 

 very strong, placed as usual; liind tibiiB reddish yellow, broadly 

 black at base and apex, their tarsi black; abdomen with a black 

 stripe above; basal half of first segment reddish-yellow; sixth and 

 seventh segments with a large black or blacldsh saddle; lateral plates 

 of genitalia large, elongated, parallel sided, the basal half red, the 

 apical half black. 



Female. — Similar to the male except in the usual generic characters; 

 areolet smaller; subapical abdominal segments black above but 

 without the broad saddle-like patches. 



Habitat. — Mexico, one of each sex, the female labeled 384. The 

 male is the type. No other data are available. 



Type.— C&t. No. 15681, U.S.N. M. 



Eiphosoma Cresson has been altered to Xiphosoma by certain 

 authors,^ but this is contrary to the rules, and also impossible on 

 account of the long prior use of the name Xiphosoma by Spix for a 

 reptile, 



I am much indebted to Mr. S. A. Rohwer of United States Bureau 

 of Entomology for references to literature and other assistance. 



1 See Krieger, Zeitschr. Hym. Dipt., vol. 3, p. 291; Sz6pligeti, Genera Insectoram, Hymenoptera, 

 Ophionoidae, p. 4. 



