British Hymenoptera. 167 



yellow ; mandibles short, curved, and pointed, their apices piceous. 

 Antennae clear rufo-testaceous ; scape flavous in front ; 2nd joint of 

 the flagellum slightly shorter than the 3rd ; 6th and 7th joints of 

 the flagellum, and sometimes the 8th, with a black spot above. 

 Thorax with two spots on the collar ; the tubercles, tegulae, and a 

 spot on the mesopleurae in front, flavous ; wings with the nervures 

 testaceous ; scutellum entirely, or with a central spot, flavous. 

 Abdomen finely punctui-ed, black ; basal segment with a brownish 

 red central band ; each of the others with a yellow band, slightly 

 narrowed in the middle ; apical dorsal valve deeply incised ; beneath 

 punctured and bancled with yellow ; 6th segment densely ciliated 

 with hairs at the apex ; 7th flattened and narrowed towards the 

 apex,' which is truncate ; 8th narrow and recurved at the apex, with 

 several spmes pointing backwards fi-om the apex, and a few smaller 

 ones on the sides pointing forwards towards it (for genitalia, &c., see 

 PL VI., figs. 3 — 3 b). Legs testaceous ; femora at the base black. 



5 . Very hke the ^ , but with the antennae of a deeper colour, 

 and not spotted above ; the scape concolorous ; markings of the 

 face of a deeper colour, more inclining to testaceous, clypeus not 

 hairy ; markings of the thorax and abdomen as in the ^ ; 5th 

 segment beneath with an apical fringe of thick stiff recurved hairs ; 

 6th flat and truncate at the apex, the sides near the ajjex with 

 thick curved testaceous spines. Legs as in the ^ . Length, 10 — 

 12 mm. 



Hah. Darenth ; Hastings, parasitic on -4 w£^rewa/i<fci- 

 crus, August, 1879 ; Eastbourne ; Sandown Bay, Isle of 

 Wight. F. Smith says that it is parasitic on Halictus 

 rubicundus and leucozonius. 



This species may be at once recognised by the brown 

 basal segment of its abdomen and the single s^Dot on the 

 scutellum. 



2. Nomada solidaginis, Panz. (PI. VI., figs. 2 — 26). 



Panz., Faun. Germ., 72, 21 ; Smith, Cat. Brit. Hym., 

 2nd ed., p. 127. 



Black. Abdomen sometimes brown. Thorax with yellow mark- 

 ings ; scutellum with a single yellow spot ; abdomen with yellow 

 lateral spots on the 2nd and 3rd segments, and entire bands on the 

 following. 



^ . Head and thorax black, largely and closely punetm-ed, 

 clothed with short pale hairs ; mandibles, labruni, clypeus, and 

 face at the sides of the clypeus, flavous ; naandibles short and 

 pointed, piceous towards the apex. Antennae short ; scape flavous 

 beneath; flagellum piceous beneath, black above, its 2nd joint as 



