226 Mr. E. Saunders' Synopsis of 



a white spot neav the apex. Antennae black, pale be- 

 neath, reachmg to about the apex of the metathorax. 

 Mesothorax dull, rather closely punctured, the intervals 

 between the punctures very finely rugose. Metathorax 

 rugose, rounded posteriorly. Abdomen black ; segments 

 rather strongly punctured, except at their extreme apices ; 

 2nd and 3rd with a lateral basal spot of white pubescence, 

 their basal region scarcely impressed ; ventral hairs very 

 short ; (for genitalia see pi. ix., fig. 2). Legs black, 

 clothed with short greyish hairs. 



$ . Head and thorax dull, punctured, &c., much as 

 in the $ ; face as long as wide across the eyes. Meta- 

 thorax somewhat rounded posteriorly, rugose at the base. 

 Abdomen black, shining, especially the basal segment, 

 which has only a few scattered punctures ; the following 

 segments are more closely and finely punctured, and 

 clothed with pale pubescence ; the 2nd and 3rd with a 

 lateral basal spot of white pubescence ; segments be- 

 neath with long whitish hairs. Legs black, clothed with 

 pale hairs. Length 6 — 7 mm. 



Hah. Very common ; the $ very variable in size. I 

 feel sure that ceratus is only a small variety. 



81. Halictus leucopus, Kirby. 



Kirby, Mon. Ap. Angl. ii., p. 59 ; Smith, Cat. Brit. 

 Hym., 2nd ed., p. 97. 



(? . Head and thorax bright bronzy green. Clypeus 

 pale at the apex ; labrum and mandibles yellow, the 

 latter rufescent at the apex. Antennae short, not quite 

 reaching to the scutellum, pale beneath. Mesothorax 

 shining, rather coarsely punctured. Metathorax some- 

 what rounded posteriorly, rugose at the base. Al)domen 

 black ; segments punctured at the base, very smooth and 

 shining at the apex, under side with very short hairs ; 

 (for genitalia see pi. ix., fig. 3). Legs black ; base 

 and apex of each of the tibiae, and all the tarsi, pale 

 yellowish. 



? . Exceedingly like riiorio, but differing in having 

 the face much wider, it being decidedly wider across the 

 eyes than long, the thorax more shining, the punctures 

 rather larger, and the intervals between them smoother ; 

 the metathorax is rather more rugose, and more widely 



