378 Col. C. T. Bingham on S. African and Australian' 



Family EUMENIDAE. 



Odynerus longstaffi, form n. 



Cape Colony : Creek on the Buffalo River, near East 

 London: Sept. 28, 1905 {G. B. Longstaff). 



$. Dull red, base of the mandibles, the clypeus, the front 

 immediately above it, the inner orbits of the eyes from the base 

 of the clypeus to the middle of the emargination in the eyes, a 

 line along the scape of the antennae in front, a transverse band 

 along the apex of the postscutellum, two obliquely placed oval 

 spots one on each side on the middle of the basal abdominal seg- 

 ment, two larger spots one on each side at the base of the 2nd 

 segment, and transverse preapical bands on the 2nd and 3rd seg- 

 ments bright yellow ; a cone-shaped large patch above the clypeus 

 extends up to the vertex including the ocelli, the mesonotum and 

 the middle of the posterior face of the median segment, black, the 

 mesonotum with a central, short, longitudinal red line. The red 

 of the antennae and legs is of a paler tint verging on orange, the 

 tibiae and tarsi of the latter still paler. Wings flavo-hyaline, the 

 radial cell and terminal edge of the forewings lightly fuscous. 

 Head above, pro- and mesonotum, scutellum, postscutellum and 

 median segment very closely and finely punctured. Head : the 

 clypeus slightly convex, its posterior and side margins above 

 rounded, the sides below straight, inclined obliquely inwards, the 

 apex truncate and circularly emarginate ; emargination of the eyes 

 deep ; antennae slender, circularly curled at their apices ; head from 

 above transversely rectangular, broader than long and as broad as 

 the thorax. Thorax massive, the median segment short, its 

 posterior face concave with a slender groove down the middle, 

 jjosteriorly the sides are rounded, and tuberculate or subdentate 

 in the middle. Abdomen : sessile, basal segment campanulate, 

 slightly strangulate before the apex, 2nd segment as broad as 

 long ; 7th broadly rounded posteriorly and fringed with brown 

 hairs. 



Length (J 13 mm. Exp. 26 mm. 



Described from one example in tlie British Museum 

 and one at Oxford : figured in " Butterfly Hunting in 

 Many Lands," Plate II, fig. 6. 



Comes nearest to 0. mutans, Sauss., from Senegambia, 

 Avhich however has two tubercles between the antennae, 

 the median segment transversely striate, the apical margin 



