148 BEES OF GREAT BRITAIN. 



clypeus rounded, and having on each side a short slightly 

 curved tooth ; the apical segment of the abdomen armed at the 

 base on each side with a slender acute spine, the lateral angles 

 of the fifth segment slightly produced ; the apex terminating 

 in two bifurcate appendages, the upper tooth of the bifurca- 

 tion very short and obtuse, the lower tooth more elongate and 

 acute. B.M. 



This is very probably the male of C. simplex, being equally 

 abundant in the London district. 



4. Ccelioxys umbrina. 



C. atra; capite thoraceque punctulatissimis, scutello utrinque 

 dente incurvo armato, margine postico rotundato. 



Ccelioxys umbrina, Smith, ZooL iii. 1153. 4. 



Female. Length 4-5 lines. Black ; the pubescence on the 

 face, sides of the thorax, and the fasciae of the abdomen, yel- 

 lowish-white ; the scutellum rounded posteriorly, and having 

 on each side a short incurved tooth ; the wings fusco-hyaline, 

 their apical margins having a broad fuscous cloud. Abdomen 

 shining, the punctures coarse, but not very close ; the apical 

 segment has a slight longitudinal carina, the apex is closely 

 punctured, opake, and sublanceolate ; the inferior plate pro- 

 duced a little beyond the upper one, its lateral margins nearly 

 parallel, its apex angular. B.M. 



Male. Length 3-4 lines. The head and thorax as in the other 

 sex, the sides of the abdomen slightly curved, the apex divided 

 into two bifurcate processes, the upper teeth being short and 

 obtuse, the lower teeth more elongate and acute ; on each side 

 of the segment an acute spine or tooth, and the extreme lateral 

 apical margins of the sixth segment produced into a short 

 tooth. B.M. 



This species occurs in the greatest abundance in Sandown Bay, 

 Isle of Wight, in the month of July, in company with Saropoda 

 bimaculata. A single specimen of the male was taken some 

 years ago in Hampshire, in the nest of Saropoda. When very 

 recently disclosed the pubescence has a yellow tint, but it will 

 usually be found cinereous from exposure. 



