British Hymenoptera. 201 



ham, and Mr. Bridgman takes it at Norwich ; it is very 

 like WillughUella , but the long straight basal joint of 

 the anterior tarsi in the <? and the entirely black apical 

 segments of the abdomen in the ? , as well as the want 

 of the basal impressions observable in Willughbiclla, will 

 easily distinguish it. 



4. Megachile ligniseca, Kirb. (PL IX., figs. 3 — 3 a). 



Kirb., Mon. Ap. Angl., ii., p. 243 ; Smith, Cat. Brit. 

 Hym., 2nd ed., p. 173. 



Black, clothed with dull brownish hairs ; pubescence of the face 

 brighter ; ^ front tarsi simple ; 6th segment with its apical crest 

 emarginate, 7th with its apex emarginate ; j large, with the scopa 

 beneath pale ochreons. 



(J . Head punctiu-ed ; face clothed with bright brown and golden 

 hairs ; mandibles shining, rugose, tridentate. Antennae rather long ; 

 apical joint not dilated, but flattened. - Thorax pimctnred rather 

 more closelj' than the head and duller, clothed with ochreous- 

 brown hairs, those of the metathorax and under side paler ; wings 

 with a darker apical margin. Abdomen punctured, segments 

 much impressed at the base ; 1st, 2nd, and base of the 3rd clothed 

 with pale hairs Hke the metathorax, the remainder with black ; 

 6th segment with its dorsal surface slightly carinated down the 

 middle, its apical crest emarginate, the real apical margin of the 

 segment (on its ventral surface) semicircularly excised ; 7th seg- 

 ment with its apex emarginate ; ventral segments clothed with 

 pale greyish hairs ; 5th with a large pale hairy central patch ; 6th 

 with the apical membranous portion reflexed, and slightly produced 

 in the centre ; the segment above the apical membrane is clothed 

 with long bristly hairs, which are simple, not hooked, at the apex ; 

 8th segment shaped much as in the other species (for genitalia, &c., 

 see PL IX., figs. 3— 3 a). 



2 . As large or larger than that of maritima, clothed as the ^ ; 

 mandibles deeply punctured, only narrowly flattened in front, 

 groove short, but deej) and wide. Abdomen clothed with hairs of 

 the same coloiu' as that on the metathorax on the first three seg- 

 ments, and with short black hairs on the rest ; the hahs of the 6th 

 segment adpressed ; all the segments with a fringe of pale hairs on 

 each side at the apex; beneath with the scopa of a duU ochreous 

 colour, paler at the sides and darker at the apex. Legs clothed 

 with pale short ochreous hairs. Length, 12—18 mm. 



Hah. Not a common species generally, but widely 

 distributed. Dartford, Kichmond, Hampton Court, 

 Windsor, Chobham, Norfolk, Colchester, &c. 



