222 Mr. E. Saunders' Siinopsis of 



and all the following segments are punctured, their apical 

 margins widely testaceous. Length 6 mm. 



Hah. Chobham, Shere, Hayling Island, &c. 



I do not know the <? of this species. 



25. Halictus atricornis, Smith. 



Smith, Ent. Ann., 1870, p. 26 ; Cat. Brit. Hym., 2nd 

 ed., p. 100. 



Very like minutus, but larger, differing in the following 

 particulars : — 



(? . ' With the puncturation of the thorax less regular 

 and rather stronger ; the brow of the metathorax not so 

 smooth and shining, and rather more largely rounded. 

 Abdomen very polished ; the puncturation at the base of 

 the 2nd and following segments much less close and 

 shallower, that of the basal segment scarcely observable ; 

 tarsi paler. Genitalia very distinct, each apex of the 

 stipites being produced into two elongate processes (see 

 pi. ix., fig. 19) ; whereas in minutus the outer process is 

 turned backwards under the body of the stipes. 



? with the face longer than in minutus, the mesothorax 

 more convex, the metathorax more widely rounded, as in 

 the (? , the abdomen much more convex and ovate, the 

 margins of the segments almost concolorous ; 1st seg- 

 ment with scarcely visible punctures ; the 2nd and 

 following with an extremely fine puncturation at the 

 base ; sides and apex of the abdomen with a few 

 greyish hairs. Legs with greyish yellow hairs. Length 

 6|- — 7| mm. 



Hah. Cheshire (B. Cooke). I know of no other 

 locality. 



26. Halictus minutissimus, Kirby. 



Kirby, Mon. Ap. Angl. ii., p. 63 ; Smith, Cat. Brit. 

 Hym., 2nd ed., p. 102. 



(? . Black ; the extreme apex of the clypeus white ; 

 mandibles piceous. Antennae reaching to the base 

 of the metathorax, piceous beneath ; mesothorax dull, 

 strongly punctured ; metathorax rather long, finely 

 rugose at the base, shining and polished beyond the 

 rugosities. Abdomen largely and distinctly punctured 



