190 BEES OP GREAT BRITAIN. 



that on the tarsi beneath fulvous ; wings subhyaline, thek 

 apical margins having a narrow fuscous cloud, darkest at the 

 tips of the anterior pair. Abdomen cylindric, the apical 

 margins of the segments have a narrow fascia of short snow- 

 white pubescence ; beneath, densely clothed with glittering 

 pale yellowish-white pubescence. B.M. 



Male. Length 4-5 lines. Black ; the face densely clothed with 

 fulvo-ochraceous pubescence, the mandibles bidentate and 

 fringed beneath with long pale ochraceous hairs, the cheeks 

 forming an obtuse tooth or prominence at the base of the man- 

 dibles; the flagellum lias its intermediate joints produced or 

 subdentate beneath. Thorax thinly clothed with pale ochra- 

 ceous pubescence ; wings as in the other sex. Abdomen thinly 

 covered with pale ochraceous pubescence, the margins of the 

 intermediate segments fringed with similar hair ; the abdomen 

 is elongate, linear, and bidentate at the apex, very much in- 

 curved ; beneath, the second segment produced into the shape 

 of a horse-shoe, concave within ; the fourth segment is deeply 

 concave, the margin ciliated with bright yellow pubescence, the 

 apical segment has a bifid tubercle beneath. B.M. 



This insect is found in all parts of the country, in fact through- 

 out Europe. It is very probable that a species described by 

 Nylander, C. nigricornis, will be discovered in this country ; it 

 closely resembles the present species, but the female wants the 

 tubercle on the clypeus, and the apex of the abdomen of the 

 male is slightly rounded, and subdentate laterally; it is com- 

 mon in France. Chelostoma usually appears about the end of 

 May ; the males may frequently be found enclosed in the petals 

 of flowers, in which they pass the night. 



2. Chelostoma Campanularum, 



C. atrum, glabriusculum ; ano maris inflexo, acute bidentato, 

 ventris basi gibba. 



Apis Campanularum, Kirby, Mon. Ap. Angl. ii. 256. 50. t. 16. 



f. 14, 15 c?. 



Megachile Campanularum, Latr. Hist. Nat. xiv. 52. 2. 

 Heriades Campanularum, Spin* Ins. Lig. fasc. ii. 198. 1. 



St. Farg. Hym. 405. 2. 



Smith, Zool. iv. 1448. 2. 



Nyland. Ap. Boreal, p. 273. 6. 

 Apis florisomnis minima, Christ, Hym. 197. 1. 17. f. 18. 



Female. Length 2-2| lines. Black, shining, closely and finely 



