British Hymenoptera. 187 



5th segment with a tuft of dark hairs on each side. Legs ferru- 

 ginous ; femora shghtly darker beneath ; posterior tibiiE with two 

 short uneven spines near the outer angle. Length, 6 — 7 mm. 



Hah. Generally distributed. London District, Tun- 

 bridge Wells, Worthing, Hastings, Exeter, Penzance, 

 Yorkshire, Norwich, &c. 



This little species is easily known from the others 

 which have the labrum black, by its long pale antennae 

 and the great length of the 3rd joint of the liagellum. 



22. Nomadafurva, Panz. (PI. VII., figs. 3—3 b). 



Panz., Faun. Germ., 55, 33 ; Smith, Cat. Brit. Hym., 

 2nd ed., p. 122. 



Dark pitchy brown, very small ; apical joint of antennae pale ; 

 (^ with a yellow lateral spot on the 2nd and 3rd segments ; 9 with 

 the sides of the segments only slightly paler, or with paler trans- 

 verse bands. 



^ . Pitchy brown ; head and thorax closely punctm-ed, clothed 

 sparingly with pale ochreous hairs ; mandibles pale in the centre ; 

 labrum with a pale spot on each side of the base ; face almost 

 entirely black ; clypeus at the extreme sides pale, as also the cheeks 

 between the eyes and mandibles ; face below the antennae clothed 

 with silvery hau's. Antemiae with the scape black, flagellum tes- 

 taceous beneath, and with the whole of the apical joint pale 

 testaceous ; 2nd and 3rd joints subequal. Thorax vsdth the tegul^e 

 and tubercles piceous ; wings clouded, with a dark apical margin. 

 Abdomen with a yellow spot on each side of the 2nd, and sometimes 

 of the 3rd segment, and occasionally with a basal line of the same 

 colour on the other segments ; 8th segment armed with two very 

 strong recurved spines at the apex (for genitalia see PL VII., 

 figs. 3 — 3 b). Legs with the knees and the femora and tibiae in 

 front paler. 



9 . Eather paler than the ^ ; labrum testaceous, as also the 

 mandibles, apex of clypeus, and cheeks between the eyes and 

 mandibles. Antemiae with the 2nd joint of the flagellum shorter 

 than the 3rd. Thorax as in the ^ , but with a rufescent spot on 

 the mesoplem-ae. Abdomen without yellow spots, but with paler 

 lateral spots or with transverse paler bands ; 5th segment with a 

 dense fringe of very fine wliite hairs. Legs as in the ^ . Length, 

 4 — 5 mm. 



Hah. Common ; parasitic on small species of Halictus. 



