British Hymenoptera. 173 



beneath, flavous ; wings smoky ; 1st transverse median ner\Tire 

 uniting with the cubital at the base of the fureature ; scutellum 

 with two large yellow spots. Abdomen finely punctured, some- 

 what shining, with an almost entire band on the 1st segment, a 

 widely interrupted band on the 2nd and 3rd, and an entire band on 

 the 4th, 5th, and 6th flavoiis ; apical dorsal valve black : beneath 

 black ; 3rd, 4th, and 5th segments widely flavous at the base, their 

 apical margins shining and imjpunctate ; 6th densely hairy in the 

 centre ; 7th smooth and shining ; 8th with the central process very 

 long, not widened at the apes, armed on each side just below the 

 apex with a very large strong spine, the sides of the process below 

 it fringed with hairs (for genitalia see PL VI., figs. 8 — 86). Legs 

 clear orange-testaceous ; coxae, trochanters, and the posterior femora 

 at the base, black ; posterior tibiae outwardly unarmed. 



$ . Very like the 3" in colour, but with the mandibles, labrum, 

 clypeus, and scape testaceous, not flavous ; the antennae with the 

 2nd joint of the flagellum longer than the 3rd ; the raetathorax 

 with a sraall flavous spot on each side; apical dorsal valve tes- 

 taceous-brown ; 5th segment beneath densely clothed with hairs at 

 the sides of the apex ; 6th with lateral spines. Legs as in the g' ; 

 posterior tibiae unarmed. Length, 10 — 12 mm. 



Hah. On Senecio in July and August ; not very com- 

 mon, but widely distributed. 



8. Nomada Lathhuriana, Kirb. (PI. VII., figs. 5 — 5 h). 



Kirb., Mon. Ap. Angl., ii., p. 183 ; Smith, Cat. Brit. 

 Hym., 2nd ed., p. 117. 



Abdomen in both sexes with continuous yellow bands, its base 

 brown; ^ with the joints of the antennae, except the four at the 

 base, with a small grain-like tubercle beneath on each ; 2 with the 

 pubescence of the thorax red. 



3 . Head and thorax black, clothed with ochreous hairs ; 

 mandibles yellow, simple, their apices brown ; labrum, clypeus, 

 a spot above it, sides of the face, and scape of the antennte in front, 

 yellow. Antennae fulvous, with the first six or seven joints black 

 above; the 5th to the 13th bearing beneath a small grain-like 

 tubercle on each. Thorax largely and very closely punctured ; 

 tubercles yellow; tegulae testaceous; wings shghtly brownish, 

 nervures testaceous. Abdomen brownish black ; the basal segment 

 with a paler brown band across the middle ; the remaining seg- 

 ments with a wide yellow basal band on each ; 8th segment with 

 the central process only slightly widened at the apex, the sides with 

 rather long somewhat reflexed hairs (for genitalia, &c., see PI, VII., 

 figs. 5 — 5b). Legs fulvous ; femora black beneath. 



