6 THE ENTOMOLOGIST. 



C. simplex, Ni/l. Revis. Apum Boreal. 279, female ; Smith, 

 Bees Great Brit. 147 ; Sc/tenck, Bees Nassau, 369. 



C. sponsa, Smith, Bees Great Brit. 147, male. 



This is the most abundant s; ecies of the genus in the 

 London district. I have received it from all parts of the 

 country. It is parasitic u])on Megachile ligniseca, VVillugh- 

 biella, and also upon M. circumcincta. 



3. CCELIOXYS RUFESCENS. 



CcElioxys rufescens, St. Farg. Hym. ii. 519 ; Blanch. Hist. 

 Nat. des Ins. iii. 413 ; Smith, Bees Great Brit. 149 ; 

 Schenck, Bees Nassau, S66 ; Nyl. Revis. Ap. Boreal. 

 279. 

 C. apiculata, N?/l. Ap. Boreal. 282, female (var.) 

 C. hebescens, Jd. 251, male, female. 



This is a local species, but very plentiful in some localities; 

 in the Isle of Wight it is common, particularly so along the 

 UnderclifF. I suspect it is parasitic upon Megachile niari- 

 tima, having repeatedly found them in the same situations. 

 I have obtained specimens from Suffolk, Norfolk, Devonshire, 

 Kent and Hants ; it is scarce in the London district. 



4. CCELIOXYS UMBRINA. 



Coelioxys umbrina, Smith, Zool. iii. 1153; Bees Great 

 Brit. 148 ; Sclienck, Bees Nassatr, 367. 



In 1839 I first took this species in Hampshire, entering 

 the burrows of Saropoda bimaculata; subsequently, in the 

 year 1851, I found it in abundance in Sandown Bay, Isle of 

 AVight, in company with the same species, which abounds in 

 that locality ; I have not found it in any other situation, lis 

 time of appearance is about the middle of July : it frequents 

 the flowers of the bramble. 



5. CCELIOXYS MANDIBULARIS. 



Coelioxys mandibularis, Nylaitd. Man. Ap. Boreal. 3, 



female. 

 C. simplex. Smith, Bees Great Brit., var. ? 

 ^ This species 1 have received from Carlisle; I also took a 

 single specimen in Yorkshire. 



