172 APID-E. 



of Saudown "Bay in great numbers ; but I have not found it burrow- 

 ing in wood. This bee is frequently seen on the flowers of the 

 mallow, Malva sylvestris ; and where that plant is not found it ap- 

 pears to choose the common bramble. 



Megachile circumcincta is a ground-burro wer, and sometimes forms 

 colonies of considerable extent. M. ligniseca is, as 1 believe, exclu- 

 sively a wood-burrowing species, preferring trees that are more or 

 less in a decaying state ; the elm, oak, or ash appear equally to 

 answer its purposes. 



Div. I. Anterior tarsi of the males simple. 



1. Megachile centuncularis. 



M. cinerascenti pubeseens : abdomine femince subcordato, segmen- 

 torum marginibus albidis ; abdomine maris subgloboso, coxis 

 anterioribus inermibus. 



Megachile centuncularis, Latr. Hist. Nat. Crust, et Ins. iv. 160. 



Spin. Ins. Ligur. i. 142. 



St.-Fary. Hym. ii. 337, tab. 21. fig. 3 $ . _ 



Guer. Icon. Hey. Aram. 449, tab. 73. fig. 7. 



Smith, Zool ii. 695 tf $ : Bees Great Brit. 174. 



Nyland. Notis. ur Stilish, pro Faun, et Flo. Ftnn. i. 258. 



Schench, Xass. Bien. 330. 



Thorns. Hym. Scand. ii. 227. 

 Apis centuncularis, Linn. Syst. 2\at. i. 953 $. 



Scop. But. Cam. 300. 



Fabr. Fnt. Syst. ii. 337. 



Schrank, Bis. Austr. 404. 



Rossi, Faun. Etrus. 927. 



Kirby, Man. Apum Any!, ii. 237 J $ . 

 Anthophora centuncularis, Fabr. Syst. Piez. 378. 



Panz. Frit. Be vis. 242. 



Zett. Ins. Lapp. 405. 



Beaum. Ins. vi. Mem. iv. tab. 10. figs. 2, 3, 4. 

 Megachile parvula, St.-Farg. Hym. ii. 340, var. minor. 



Female. Length 3|-5^ lines. — Black ; head, the front covered with 

 pale fulvous pubescence, that on the vertex is less dense and 

 fuscous ; mandibles quadridentate, the two apical ones acute, closely 

 punctured. Thorax, the pubescence on the sides and beneath pale 

 fulvous ; on the metathorax, which is closely punctured, the pubes- 

 cence is less dense and more or less fuscous ; the legs have a short 

 cinereous pubescence, on the tarsi beneath it is fulvous ; the calcaria 

 and claws rufo-testaceous ; wings subhyaline, their apical margins 

 slightly clouded. Abdomen subcordate ; the margins of the basal 

 segments depressed : the apical margins of all the segments with a 

 narrow fringe of pale pubescence, which is usually more or less 

 interrupted in the middle ; beneath, densely clothed with bright 

 fulvous pubescence. B.M. 



Var. p. The legs dark rufo-piceous. 



