O BEES OF GREAT BRITAIN. 



Male. Length 3 lines. Black ; the face densely covered with 

 very pale ochraceous pubescence ; the thorax clothed as in the 

 female, but the abdomen is much more strongly punctured, all 

 the segments having pale marginal fasciae ; the punctures on 

 the basal segment are deep, but not very close ; beneath, the 

 segments have a fringe of white pubescence. B.M. 



This is the smallest species found in this country. I have 

 compared British specimens with the Swedish one in the Lin- 

 naean Cabinet and find them identical ; it was first captured by 

 Mr. Samuel Stevens at Little Hampton, Sussex, since which it 

 has been taken in Yorkshire, and also received from Cumber- 

 land. 



4. Collates Daviesana. 



C. nigra, pallido-villosula ; abdomine laevi, nitidissimo, punctis 

 minutis sparsiori. 



Melitta Daviesana, Kirby's MSS. ii. 



Colletes Daviesana, Smith, Zool. iv. 1278. 4<? ? . 



Female. Length 4-4| lines. Black ; the clypeus covered with 

 cinereous pubescence, becoming gradually fulvous towards the 

 vertex ; the thorax thinly clothed on the disk with fulvo-ochra- 

 ceous pubescence, on the sides it is much paler, and beneath 

 and on the legs nearly or quite white ; the wings hyaline, their 

 nervures ferruginous. Abdomen smooth and shining, delicately 

 punctured, most strongly at the base ; all the segments have a 

 fascia of pale ochraceous pubescence on their apical margins, 

 the first of which is usually interrupted. B.M. 



Male. Length 3^-4 lines. The pubescence on the head and 

 thorax similar to that of the female ; the flagellum sometimes 

 nigro-piceous beneath ; the abdomen oblong ovate, shining, 

 rather more deeply punctured than the female ; the base thinly 

 clothed with long ochraceous pubescence ; all the segments have 

 similar fasciae to the female, but the first is frequently obli- 

 terated, usually more or less so ; beneath, the fasciae curve up- 

 wards from the lateral margins to the middle of the segment, 

 but do not meet in the centre. B.M. 



The greatest difficulty in this genus is to distinguish the males 

 from each other ; that of C. marginata is the largest, its abdomen 

 most convex, and its fasciae the most white and even, with little 

 or no pubescence between ; in C. fodiens the close puncturing 

 will serve to distinguish it ; that of C. Daviesana may be detected 



