182 Mr. E. Saunders' Synopsis of 



metathorax as in the $ . Abdomen rather more brightly coloured, 

 but similarly marked ; the 5th segment with a large quadrate white 

 spot; beneath with the basal segments ferruginous, the apical 

 black. Legs as in the $ . Length, 6 — 7 mm. 



Hah. Rare. Blackwater, Hants ; Chobham, Surrey ; 

 Carlisle ; on Senecio and other yellow Composite flowers 

 in June and July. 



17. Nomada ohtusifrons, Nyl. (PI. VII., fig. 8). 



Nyl., Not. Sallsk., pro Faun. Flor. Fenn., Forh., i., 

 p. 184 = xanthosticta, Smith, Cat. Brit. Hym., 2nd ed., 

 p. 124 (not xanthosticta, Smith, 1st ed.) = mistura, 

 Smith. 



Small; labrum black; both sexes without a shai-p carina be- 

 tween the antennse ; <? with the abdomen piceous, with a yellowish 

 white spot at each side of the 2nd and 3rd segments ; $ with the 

 abdomen ferruginous, spotted as in the S > but with a large quadrate 

 spot on the 5th segment ; the spots are sometimes obsolete. 



3' . Head and thorax black, clothed with greyish brown hairs, 

 largely and closely punctured; mandibles short and thick, tes- 

 taceous, piceous at the apex ; labrum black ; clypeus with the 

 extreme margin piceous. Antennae black ; face between the 

 antennte with an obtuse elongate tubercle ; flagellum testaceous 

 beneath, its 2nd joint longer than the 3rd. Thorax with the 

 tubercles pale, the tegulse piceous; wings slightly dusky; 1st 

 transverse median nervure uniting with the cubital before the fur- 

 cature ; scutellum entirely black ; metathorax nearly smooth on 

 its basal area. Abdomen punctured, piceous-black, the apices of 

 the segments paler, the 2nd and 3rd with a yellowish white lateral 

 spot ; the 4th and 5th with white transverse lines, that on the 4th 

 often obsolete ; apical segment rounded at the extremity ; beneath 

 pitchy black, the apices of the segments paler ; 6th segment with a 

 small pale apical spot, but not densely hairy as in most of the 

 species (for genitalia see PI. VII., fig. 8). Legs piceous ; base 

 of the femora and a cloud across the tibiae black or nearly so. 



$ . Like the $ as to the head and thorax, both in colour and 

 puncturation, but with a much shorter, hardly conspicuous, pube- 

 scence. Abdomen ferruginous ; 2nd and 3rd segments with a 

 yellowish white spot on each side ; 5th with a square white central 

 spot, the spots are sometimes wanting ; 3rd and 4th segments 

 piceous towards the apex ; beneath ferruginous. Legs as in the 

 $ , but paler. Length, 6 mm. 



Hab. Eare. Norwich ; Ilfracombe ; Yarm, York- 

 shire; Scotland, 



