BEES OF GREAT BRITAIN. 189 



than once been bred from its nests. The parasite enters the 

 burrows; it does not introduce its ovipositor, or its abdomen, 

 but enters and disappears in search of its victim. Chrysis ignita 

 and C. cyanea have been reared from the nests of this bee. 

 Mr. Kirby mentions, in connexion with his description of the 

 bee, Ichneumon femorator, which his friend Mr. Trimmer found 

 in the nest of Chelostoma ; and he also observes, that Bergman 

 records the fact of Ichneumon (Fanus) jaculator being parasitic 

 upon these bees ; it may be frequently observed about the bur- 

 rows of Chelostoma. 



1. Chelostoma florisomne. 



C. atrum, glabriusculum ; mandibulis prominentibus,*intus bar- 

 batis, abdominis segmentis marginibus albis. Mas, cinereo-vil- 

 losus ; abdomine incurvo, ventre basi cornuto, ano bidentato. 



Apis florisomnis, Linn. Faun. Suec.p. 413 (1704) ; Syst. Nat. i. 954. 

 13, fy Cab. Mus. Linn. Sac. <J . 



Scop. Ent. Cam. p. 299. 796. f. 796. 



Fabr. Syst. Ent. p. 387. 55. 



Kirby, Mon. Ap. Angl. ii. 253. 49. 



Apis maxillosa, Linn. Syst. Nat. i. 954. 11 ? , 8f Calf. Mus. Linn. 

 Soc. 



Fabr. Mant. i. 305. 86. 



Kirby, Mon. Ap. Angl. ii. 251. 48. 



Hylaeus florisomnis, Fabr. Ent. Syst. ii. 304. 5 ; Syst. Piez, 

 p. 319. 3. 



Panz. Faun. Germ. 46. 13. 

 Hyteus maxillosus, Fabr. Ent. Syst. ii. 303. 4 ? . 



Panz. Faun. Germ. 53. 17. 



Anthophora truncorum, Fabr. Syst. Piez. p. 379. 29, var. $ . 

 Megachile maxillosa, Latr. Hist. Nat. xiv. 51. 1 $ $ . 

 Megachile florisonmis, Spin. Ins. Lig. fasc. i. 134. 1. 

 Cheiostoma maxillosa, Latr. Gen. Crust, et Ins. iv. 162. 



Brulle', Eccped. Sc. de More'e, iii. 342. 757. 



St. Farg. Hym. ii. 407. 1. 

 Chelostoma florisomnis, Curtis, Brit. Ent. xiv. t. 628 < . 



Smith, Zool. iv. 1445. 1. 

 Heriades maxillosa, Zett. Ins. Lapp. p. 467. 1. 



Nyland. Ap. Boreal p. 268. 1 ; Revis. Ap. Boreal, p. 277. 2. 



female. Length 3 5 lines. Black, shiningand punctured; the 

 face having a little white pubescence on each side, the anterior 

 margin of the clypeus produced, forming a flattened projecting 

 plate or tubercle ; the thorax has a few pale scattered hairs 

 at the sides; the legs have a short silvery-white pubescence, 



