British Hymenoptera. 185 



The coloration of this species varies very much, 

 especially in the <? , some specimens being almost 

 entirely black (var. atrata, Smith). 



20. Nomada Fahriciana, Linn. (PI. VIL, figs. 1 — 1 h). 



Linn., Syst. Nat., ed, xii., p. 955 ; Smith, Cat. Brit. 

 Hym., 2nd ed., p. 125. 



Very like the preceding in some varieties, but at once dis- 

 tinguished by the simple antennae of the $ , and the longer antennae 

 of the $ , which have a broad black band extending across the 8th, 

 9th, 10th, and 11th joints. 



$ . Head and thorax deep black, closely and deeply punctured, 

 clothed with greyish hairs ; mandibles black, or very dark piceous ; 

 labrum and clypeus black ; cheeks between the eyes and mandibles 

 flavous ; face below the antennae clothed with silvery hairs. An- 

 tennae with the scape black ; flagellum piceous, black above, its 

 2nd joint scarcely half the length of the 3rd. Thorax with the 

 tubercles and tegulte black ; wings clouded ; scutellum entirely 

 black ; metathorax with the basal area finely rugose. Abdomen 

 ferruginous ; base of the 1st segment black, and often also the 

 bases and apices of the other segments ; the 2nd and 3rd segments 

 generally with a yellow lateral spot; sometimes, however, the 

 whole abdomen is ferruginous, with the exception of the black base ; 

 7th segment sharply emarginate at the apex ; beneath ferruginous, 

 largely and remotely punctured ; 8th segment with a very long 

 apical process, fi'inged with fine hairs at the sides, scarcely dilated 

 at the apex, which has a fine somewhat reflexed spine on each side 

 (for genitaha see PL VII., figs. 1 — 1 b). 



$ . Larger and stouter than the $ ; face entirely black, clothed 

 with black and grey hairs. Antennae rather long, scape black ; 2nd 

 joint of flagellum ferruginous-red beneath, black above, rather 

 more than half as long as the 3rd ; 8rd, 4th, 5th, and Gth ferru- 

 ginous-red; 7th to 11th black; apical joint fen-uginous. Thorax 

 with the tubercles black, tegulas testaceous ; wings as in the <y . 

 Abdomen dark ferruginous-red, base black ; the 2nd and 3rd 

 segments often with a round yellow spot on each side ; margins of 

 the segments generally more or less black, beneath ferruginous, 

 sides of the segments with a few prominent hairs. Legs black ; 

 knees and the anterior femora and tibiae in front testaceous. Length, 

 7 — 9 mm. 



Hah. Not rare, and generally distributed ; I have 

 taken it on Wandsworth Common as early as May, and 

 at Hastings as late as August 16th. F. Smith says 



