184 Mr. E. Saunders' Synoi^sis of 



abdomen without a deep fovea on each side, but with a 

 slight wide depression ; all the segments beneath very shin- 

 ing and flat, each with the apical half slightly impressed ; 

 the pubescent bands interrupted in the centre ; genitalia 

 with the sagittae narrow and winged nearly throughout 

 their length ; the stipites much narrower than in 

 succincta, and longer in proportion to the length of the 

 sagittae (see pi. vii., fig. 1). Tarsi with the joints much 

 wider than in succincta, nearly as wide as long ; the legs 

 altogether much more hairy than in that species. 



The ? differs from succincta in the more brightly- 

 coloured hairs of the thorax, in the dull, much more 

 rugosely punctured, abdomen, the concolorous margins 

 of the segments (although the basal segment is some- 

 times narrowly testaceous at the apex), the wider and 

 more ochreous coloured abdominal bands, and the shorter 

 cheeks between the eyes and the mandibles, the clypeus 

 more densely clothed with hairs and slightly emarginate. 

 Length 9 — 10 mm. 



Hah. Sandy commons, &c. ; generally common. 



3. Colletes picistigma, Thorns. 



Thoms., Hym. Scand. ii., p. 165 = marginata, Schenck, 

 nee Smith. 



So like the two preceding that it is only necessary to 

 point out its distinguishing characters. 



The ^ may be known from that of succincta by the 

 shorter antennae, the absence of the small deep foveae in 

 the 6th ventral segment, and the different genitalia, as 

 shown in pi. vii., fig. 3 ; from fodiens by having the 

 segments of the body beneath with complete apical 

 fasciae, their surface less shining, and not quite so flat, 

 the 6th segment beneath largely punctured, with a large 

 shallow marginal depression on each side near the 

 apex, leaving the disk raised, and by the very different 

 genitalia. 



? differs from succincta in having the dull close punc- 

 turation of fodiens, and the concolorous margins of the 

 segments ; from fodiens it differs in the deeper black 

 colour of the abdomen, and in its slightly wider and 

 shorter form, in the absence of long pale hairs on 



