British Hymenoptera. 177 



ferruginous, their basal joints more or less black above. Length, 

 8—9 mm. 



Hah. Norwich; Yorkshire; Newcastle. 



The yellow tubercles distinguish this species at once 

 from ruficornis and its allies ; the male may be known 

 besides by its black scape. 



12. Nomada ruficornis, Linn. (PI. VII., figs. 2—2 h). 

 Linn., Syst. Nat., ed. x., i., p. 578 ; Smith, Cat. 

 Brit. Hym., 2nd ed., p. 110 = lateralis, Sm. pars ?. 



Var. = signata, Jur., Smith, &c. 



Mandibles acute ; scape of antennae in the ^ flavous in front. 

 Thorax with red Hues in the J , the tegulae and tubercles piceous, 

 sometimes ochraceous in the ^ . Abdomen bright brown, with 

 yellow lateral spots or continuous bands ; femora scarcely hairy 

 outwardly in the J ; posterior tibise armed outwardly with pale 

 spines of uneven length. 



(J . Head and thorax black, closely punctured, and densely 

 clothed with brownish gi-ey hairs ; mandibles, labrum, clypeus, and 

 face at its sides, flavous ; mandibles acute, their tips piceous ; face 

 in front of the antennae clothed with silvery hairs. Antennte with 

 the scape black, flavous in front ; flagellum narrowly black above, 

 beneath fulvous; 2nd joint about half as long as the 3rd. Thorax 

 with the tu.bercles testaceous or ochraceous ; tegulse testaceous or 

 piceous ; wings slightly clouded, especially at the apical margin ; 

 scutellum with two red spots, or unspotted. Abdomen shining and 

 finely punctured, black at the extreme base ; basal segment beyond 

 the black base generally entirely brown or with two black spots on 

 the disk ; the remaining segments brown, either with lateral yellow 

 spots or with contimious yellow bands, the brown colour often 

 deepened almost into black along the marguis of the segments ; 

 beneath brown, with yellow bands ; 8th segment with the apical 

 process much curved, not widened at the apex, and finely j&ringed 

 at the sides with hairs, and with two strong reflexed apical spines 

 (for genitalia see PL VII., figs. 2 — 2 b). Legs ferruginous, the base of 

 the femora more or less black ; posterior tibiae armed at the apex 

 outwardly with fine siDines of uneven length. 



$ . Head and thorax black, clothed with short brownish hairs, 

 the former with the mandibles, clypeus, labrum, and sides of the 

 face fulvous. Antennae fulvous, with the 2nd joint of the flagellum 

 about tln-ee-fom-ths the length of the 3rd. Thorax almost entirely 

 black, or black with narrow or broad red longitudinal stripes, or 

 red with only indications of the darker lines ; tubercles and tegulie 



