British Hymenoptera. 199 



of hairs of a somewhat orange-red colour on the 3rd and 4th, and 

 of nearly black hairs on the 5th and 6th. Legs black, clothed with 

 golden brown hairs ; coxae, femora, tibia, and tarsi simple, except 

 that the basal joint of the posterior tarsi is enlarged and flattened, 

 as in most of the Anthophila. Length, 14 — 15 mm. 



Hah. Common in most places along our coasts ; also 

 at Norwich, Weybridge, &c. ; but I do not know if it 

 occurs frequently in the north. 



Thomson says, 6th segment "acute 4-dentato." 



2. Megachile Willughhiella, Kirb. (PI. IX., figs. 1—1 a). 



Kirb., Mon. Ap. Angl., ii., p. 233 ; Smith, Cat. Brit. 

 Hym., 2nd ed., p. 178. 



Very like the preceding, but smaller, and differing in 

 the following particulars : — 



^ . With the pubescence less brightly coloured, and that of the 

 abdomen less dense ; 6th segment with the emargination of the 

 apical crest wider and deeper, its real apex deeply emarginate, the 

 sides of the emargination angularly produced ; 7th segment just 

 visible, with a central tooth, which is visible through the emargi- 

 nation of the 6th (this gives the appearance of the 7th segment 

 being tridentate, as recorded by Smith) ; 6th ventral segment with 

 the apical wing angularly produced in the middle of its anterior 

 margin, besides being angulated at the sides (for genitalia, &c., see 

 PL IX., figs. 1 — 1 a). Front legs with the tibiae pale in front only at 

 the apex ; tarsi largely dilated and fringed ; 1st joint nearly as 

 broad as long ; 2nd joint not spotted beneath ; posterior tibiae not 

 thicker than the femora; basal joint of the tarsi not unusually 

 dilated, nearly three tinaes as long as wide. 



2 • Very like that of maritmia, but rather smaller, with the 

 mandibles more rugose and less shining, and the groove less 

 strongly marked and shorter; puncturation of the thorax rather 

 less close, giving the surface a slightly less dull appearance. Ab- 

 domen with the 1st, 2nd, and 3rd segments clothed with short pale 

 hairs, the remainder with black, the 4tli and 5th having a pale 

 apical fringe ; segments deeply impressed at the base ; beneath 

 with the scopa orange-red, the haii's of the 5th and 6th segments 

 black ; legs with pale hairs. Length, 12 — 14 mm. 



Hah. Generally common and widely distributed. 



