British Hymenoptera. 175 



with the apical process winged on each side nearly to its apex, 

 which is widened and armed on each side with fine pale spines (for 

 genitalia see PI. VI., figs. 7 — 7 b) . Legs rufo-testaceous ; intermediate 

 and posterior femora black at the extreme base ; posterior tibiae 

 armed outwardly at the apex with five long nearly equal pale 

 spines. 



2 . Eather darker than the <? ; mandibles, clypeus, sides of the 

 face, and antennae rufo-testaceous ; 2nd and 3rd joints of flagellum 

 subequal ; prothorax and tubercles testaceous ; mesothorax with a 

 rufo-testaceous vitta at each side, and two others down its disk ; 

 mesopleurae with a large riTfo-testaceous spot ; tegulae testaceous ; 

 scutellum testaceous; metathorax with two small rufo-testaceous 

 spots at the base in the basal enclosure, and two larger ones below, 

 its sides clothed with shining silvery hairs. Abdomen bright rufo- 

 testaceous, black at the extreme base ; each segment slightly darker 

 towards the apex ; a large spot on each side of the 2nd segment, a 

 smaller one on each side of the 3rd, a transverse narrow spot on 

 each side of the 4th, almost extending to the centre, and a square 

 spot on the 5th, cream-coloured ; beneath rufo-testaceous. Legs 

 nifo-testaceous ; femora at the extreme base more or less black ; 

 posterior tibiae armed at the apex outwardly with five equally long 

 curved black spines. Length, 7 — 9 mm. 



Hah. On heaths, and parasitic on Andrena argentata. 

 Woking, Sandhurst, Farnborough, Bournemouth, &c. 



This species varies considerably in the extent of the 

 testaceous colour. On the Continent a large form of it 

 is known, the 5-spinosa of Thomson ; but, so far as I 

 know, the small form only has hitherto occurred in this 

 country. 



10. Nomada guttulata, Schenck. 



Schenck, Jahr. Ver. Herz. Nassau, xiv., p. 388 = ruji- 

 lahris, Thoms. 



I have only a single 2 of this species without locality, 

 and therefore I introduce it with some hesitation ; it 

 would naturally pass as a small ochrostoma, but the 

 mandibles are sharp at the apex, and the posterior tibiae 

 have outwardly three very short blunt spines, a character 

 quite peculiar to itself ; the 2nd and 3rd joints of the 

 flagellum of the antennae are subequal. 



Thomson finds this species in Sweden, and has de- 

 scribed it under the name of rufilahris. 



TRANS. ENT. SOC. LOND. 1884. PART II. (jULY.) N 



