168 Mr. E. Saunders' Synopsis of 



long or longer than the 3rd and following joints, transverse. 

 Thorax with two spots on the collar, the tubercles, tegulae, and an 

 oval spot on the mesopleurae, flavous ; wings dusky, nervures 

 pitchy ; sciitellum with a single flavous spot. Abdomen black or 

 rarely brown, shining, finely punctured, except at the extreme apex 

 of each segment ; 1st segment immaculate, 2nd and 3rd with a 

 large yellow spot on each side, ith with an entire yellow band, and 

 5th and 6th almost entirely yellow ; 7th black, rounded at the apex ; 

 beneath black, shining, and punctured, except at the apex of each 

 segment; 7th segment smooth and convex, and narrowly rounded 

 at the apex ; 8th shaped much like the 7th, but flatter, and armed 

 at the apex on each side with a long upcurved spine and several 

 shorter ones along the sides of the segment (for genitalia, &c., see 

 PI. VI., figs. 2 — 2 6). Legs testaceous-red, flavous at the knees; 

 posterior femora black at the base ; posterior coxse with a yellow 

 spot. 



2 . Very like the ^ , but with the ground colour of the abdo- 

 men often brown, the labrum and scape of the antennae ferruginous, 

 the clypeus not hairy and of a more ferrugmous colour, the 

 mandibles flavous only at the base, the thorax and abdomen 

 coloured as in the ^ ; 5th ventral segment with a fringe of strong 

 black curved hairs on each side at the apex ; 6th flat and impressed 

 in the centre, truncate at the apex, with three or four curved spines 

 at each side of the truncature. Legs coloured much as in the ^ , 

 but posterior femora with only a black stripe on their inner surface. 

 Length, 8 — 9 mm. 



Hah. Common on Senecio, &c., in July and August, 

 and widely distributed. F. Smith says that it is para- 

 sitic on Halictus leucozonius, and probably also on H. 

 cylindricus. 



This little species can hardly be confounded with any 

 other ; it is most like Jacohcece, but its single spotted 

 scutellum will distinguish it at once. 



3. Nomada sexfasciata, Panz. (PL VI., figs. 4 — 46). 



Panz., Faun. Germ., 62, 18; Smith, Cat. Brit. Hym., 

 2nd ed., p. 130. 



Black ; clypeiis produced so as to give the head a rostrate 

 appearance ; mouth, tegulae, and two spots on the scutellum, an 

 interrupted band on the first three segments of the abdomen, and 

 an entire band on the others, yellow ; legs yellow in the (? , testa- 

 ceous in the J . 



^. Head and thorax dull, closely and rugosely punctured, 

 rather densely clothed with brownish grey hairs ; the portion in 



