BEES OF GREAT BRITAIN. 177 



3. Megachile versicolor. 



M. cinerascenti-pubescens, abdomine subcordato, segmentorum 

 marginibus albidis ; ventre lana versicolori dense vestito. 



Megachile versicolor, Smith, ZooL ii. 697. 9 ? . 



Female. Length 5 lines. Black ; on each side of the face a 

 little bright pale yellow pubescence ; the mandibles very large, 

 produced, the teeth of one fitting into the interstices between 

 those of the opposite mandible ; on the cheeks, thorax, and 

 legs the pubescence is cinereous, intermixed with fuscous on the 

 disk of the thorax ; wings subhyaline, the nervures black ; the 

 tarsi fulvous beneath, the claws ferruginous. Abdomen sub- 

 cordate, the intermediate segments have laterally a white mar- 

 ginal fringe, the margins of the four basal segments depressed ; 

 beneath, the second, third and fourth segments are densely 

 clothed with bright fulvous pubescence, that on the fifth and 

 sixth is black. B.M. 



This species very closely resembles M. centuncularis, the 

 colour of the pollen-brush being the principal distinctive dif- 

 ference, but it is certainly more than a variety : one specimen 

 occurred at Byfleet near Weybridge : the male will probably be 

 found to be very different from that of M. centuncularis. Mr. 

 Walcott has a specimen taken near Bristol. 



4. Megachile pyrina. 



M. pallide pubescens, thoracis dorso fusco ; abdominis segmentis 

 marginibus fulvis. Abdomine marls incurvo, ano emarginato ; 

 tarsis runs. 



Megachile pyrina, St. Farg. Hym. ii. 334. 8 $ $ . 

 Megachile rufitarsis, Smith, Zool. ii. 695. 2 J . 

 Megachile fasciata, Smith, Zool. ii. 694. 5 $ . 



Female. Length 5-6 lines. Black ; the face on each side has 

 some rich yellow pubescence, that on the vertex is black. Tho- 

 rax : the pubescence on the disk short, sparing and black, that 

 on the sides and beneath pale fulvous, the metathorax has a 

 short pale pubescence ; the apical joints of the tarsi are ferru- 

 ginous; the wings subhyaline, their apical margins clouded. 

 Abdomen : the two basal segments thinly clothed with pale ful- 

 vous pubescence, on the following segments it is short and fus 



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