AMERICAN HYMENOPTERA. 



143 



Genus MYGNIMIA. Smiili. 

 For this genus, Mr. Smith (^Bril. JJiis. Oat. IL/m. iii, p. 182) gives 

 tlie following characters: "The superior wings [Fig. 16] with one 

 Figure 16. elongate marginal cell and three 



.submarginal cells; the first re- 

 current nervure uniting with the 

 second transverso-cubital ner- 

 vure ; the second recurrent ner- 

 vure entering the third submar- 

 ginal cell about one-third from its base; the legs strongly serrate or 

 spinose, the claws having a tooth beneath more or less developed, in 

 some species as stout as the claws themselves." All the species de- 

 scribed are from the Old AVorld, except the following : — 



1. Mygnimia mexicana, n. sp. 



Femole. — Large, deep black, without any violaceous or purplish re- 

 flection ; head and thorax opaque, abdomen shining ; antennae pale- 

 yellowish, the scape and base of flagellum, black; wings deep bright- 

 yellow, the anterior pair tinged with bright ferruginous; the extreme 

 apex of both wings fuliginous ; metathorax transversely rugose, trun- 

 cate behind. Length 10^ — -12] lines. 



Hah. — Vera Cruz, Mexico, (Coll. Am. Ent. Soc., from Mr. Chas. 

 Sartorius). 



Four 9 specimens. DiiFer from the description, given below, of natii- 

 lata by the mucli larger size, by the color not being violaceous-black, 

 and by the yellow antennae. 



2. Mygnimia ustulata. 



Hemipep.'sis ustulata, Dahlb., Hym. Eur. i, p. 123. 

 Mygniviia ustulata, Smith, Brit. Mus. Cat. Hym. iii, p. 189. 

 '"■Female. — Medium (f inch long), violaceous-black; wings fulvous, 

 somewhat golden, base and apex dark fuliginous." 

 Hab. — " Mexico." Not seen. 



Genus PEPSIS, Fabr. 

 This genus is characterized by having the wing-cells arranged as 

 in Fig. 17. The antennee are convolute in the 9; long, porrect and 

 Figure 17. incrassate in the % ; the four pos- 



terior tibia3 are serrated in the 9 , 

 simple in tlie % , which have the 

 posterior legs very long in propor- 

 tion to the two anterior pairs, and 

 have the joints of their tarsi flat. 

 The species are of large size, and most of them are very handsome. 



