220 hymenoptera. 



2. Chelostoma nigricorne. B.M. 

 Heriades nigricornis, Nyland. Ap. Boreal, p. 269. 2. 



Hab. France; Switzerland; Denmark; Sweden; Finland. 



3. Chelostoma grande. 



Heriades grandis, Nyland. Revis. Ap. Boreal, p. 277- 1. 

 Hab. Switzerland. 



4. Chelostoma culmorum. 



Heriades culmorum, St. Farg. Hym. ii. 408. 2 {var. H. florisom- 



nis ?). 



Hab. France (Paris). 



5. Chelostoma Campanularum. B.M. 



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



f. 14 ? . 15 c? . 

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

 Heriades Campanulanun, Spin. Ins. Lig. fasc. iii. 198. 1. 



St. Farg. Hym. 405. 2. 



Smith, Zool. iv. 1448. 2. 



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

 Apis florisomnis minima, Christ. Hym. 197. t. 17- f- 18. 

 Chelostoma campanularum, Eversm. Bull. Mosc. xxv. 75. 4. 



Hab. Britain ; France ; Italy ; Germany ; Russia ; Denmark ; 

 Sweden and Finland. 



6. Chelostoma robustum. 



Heriades robusta, Nyland. Ap. Boreal, p. 270. 3. 

 Hab. Finland. 



7. Chelostoma albifrons. 



Chelostoma albifrons, Kirby, Faun. Boreal. Amer. p. 270. 1. 

 Hab. N. America. 



8. Chelostoma rugifrons. B.M. 



Female. Length 5 lines. — Black, the head strongly punctured ; 

 the face has some white pubescence on each side at the insertion 

 of the antennaj ; the mandibles very stout, having a tooth near 

 their base within, their apex tridentate, the middle tooth minute, 

 longitudinally grooved above. Thorax strongly punctiu-ed; its 

 pubescence, as well as that of the legs, white, the claw-joint rufo- 



