British Hymenoptera. 189 



into a wing-like appendage. See pi. vii., fig. 4. Length 

 6 — 7 mm. 



Hab. Very rare. Eeigate ; Hastings ; Cove Common, 

 Hants, &c. 



The black face of the 3' , with its pilose scape 

 and the extraordinary genitalia, and the spinose face 

 of the ? , distinguish this species from all the others 

 of the genus. 



2. Prosopis dilatata, Kirby. 



Kirby, Mon. Ap. Angl., vol. ii., p. 39 ; Smith, Cat. 

 Brit. Hym., 2nd ed., p. 8 ; Fig. Smith, Trans. Ent. Soc. 

 Lond., iv., pi. iii., fig. 1. 



Black ; t? with the face below the antennae, the dilated 

 portion of the scape in front, the flagellum, except a line 

 at the back, yellow ; ? with the antennae fulvous beneath, 

 and a round yellow spot just under the insertion of each 

 antenna ; tegulae and tubercles in both sexes, apices of 

 the femora, and the whole of the tibiae and tarsi in 

 the 3 , and the base of the tibiae in the ? , yellow. 



Head and thorax dull, deeply and closely punctured. 

 Antenna in the <? with the scape flattened, deeply punc- 

 tured, and much dilated, its posterior margin largely 

 rounded at the base, then nearly straight to the apex, 

 the apical margin forming with it a slightly obtuse 

 angle ; the anterior margin is largely rounded, especially 

 at its juncture with the apical margin, and then ap- 

 proaches the base in a line convergent with the posterior 

 margin ; ? with the antennae simple ; the face rounder 

 than in most of the species. Wings slightly dusky. 

 Abdomen dull, and rather largely punctured in the 3 , 

 somewhat shining and finely punctured in the ? ; 2nd 

 segment in the <? with an impressed line near the base ; 

 tibiae slightly hairy ; <? genitalia with the stipites short 

 and simple, but narrowly rounded at the apex ; apical 

 hairs short ; sagittae short and somewhat triangular. 

 See pi. vii., fig. 11. Length 5 — 6 mm. 



Bare. Hawley, Hants ; Arundel ; Hayling Island, on 

 Hieracinm and Euphorbia, &c., both sexes ; Hastings. 



