442 PROCEEDINGS OF THE NATIONAL MUSEUM. vou 64. 



Group 9. 



26. swenki Pierce, 1909 ; Nebraska, Pennsylvania ; parasite of Andremi 

 soUdaginis Robertson. 



Group 10. 



27a. claytoniae, var. claytoniae Pierce, 1909; Georgia, Illinois; para- 

 site of Andrena imitatrix Cresson {claytoniae Robertson). 

 h. var. imitatrix Pierce. 1909; Texas; parasite of Andrena imi- 

 tatrix Cresson. 

 <?. var. vierecki Pierce, 1909 ; Texas ; parasite of Andrena imitatrix 

 Cresson (texana profunda Viereck). 



Group 11. 



28. hni7ier'i Pierce, 1909; Nebraska, Illinois; parasite of Andrena 



illinoiensis Robertson. 



29. ohlahomae Pierce, 1909; Oklahoma; parasite of Andrena falvo- 



clypeata miserabilis Ci-esson. 



30. salictariae Pierce, new species ; Illinois ; parasite of Andrena salic- 



taria Robertson. 



31. andrenoides Pierce, 1911; Illinois; parasite of Andrena andre- 



noides Cresson. 



32. medionitans Pierce, new species; Colorado; parasite of Andrena 



medionitans Cockerell, 



Group 12. 



33. sinuatus Pierce, new species; Illinois; parasite of Andrenn man- 



dihularis Robertson. 



34. grandlor Pierce, new species; Montana; parasite of Andrena 



grandior multiplicatiformis Viereck. 



35. nudae Pierce, 1911 ; Illinois; parasite of Andrena nuda Robertson. 



36. coimil Pierce, 1909; Wisconsin; parasite of Andrena commoda 



Smith. 



37. calif ovmica Pierce, 1909 ; southern California ; parasite of Andrena 



suhtilis Smith. 



38. vicinae Pierce, 1909; New Hampshire, Connecticut, Canada, Mas- 



sachusetts, Colorado; parasite of Ajidrena vic'ma Smith. 



Group 13. 



39. saliciforis Pierce, 1909; Washington; parasite of Andrena sali- 



cifloris Cockerell. 



Group 14. 



40. gracniehcri Pierce, 1909 ; Wisconsin ; parasite of Andrena nivalis 



Smith. 



