N0.2242. MORPHOLOGY OF THE STREP81PTERA— PIERCE. 441 



The elytra have a strong marginal vein and at base have a small 

 rounded flap. 



Type.— Cat. No. 21438, U.S.N.M. 



The remaining species are to be retained in Stylops until the male 

 characters are known. 



Unplaced as to Geoup. 



12. asteridis Pierce, 1911; Illinois; parasite of Andrena asteris Kob- 



ertson. 



Group 1. 



13. bipv/nctatae Pierce, 1909; Indiana, Nebraska, Wisconsin, para- 



site of Andrena hipunctata Cresson. 



14. moestae Pierce, new species; Washington; parasite of Andrena 



moesta Smith. 



Gboup 2. 



15. mandibularis Pierce, 1911; Illinois; parasite of Andrena mandi- 



bularis Eobertson. 



Group 3. 



16. nubeculae Pierce, 1909; Colorado; parasite of Andrena nuhecvla 



Smith. 



Group 4. 



17. subcandidae Pierce, 1909; Southern California; parasite of An- 



drena subcandida Viereck. 



Group 5. 



18. krygeri Pierce, new species; Denmark; parasite of Andrena, 



species. 



Group 6. 



19. multiplicatae Pierce, 1909 ; Wisconsin ; parasite of Andrena mul- 



tiplicata Cockerell. 



20. advarians Pierce, 1909; British Columbia; parasite of Andrena 



advarians Viereck. 



21. bisalicidis Pierce, new species; Alabama; parasite of Andren/i 



bisalicis Viereck. 



22. aparsipilosae Pierce, 1909; Maine; parasite of Andrena sparsi- 



pilosa Viereck. 



Group 7. 



23. erigeniae Pierce, new species; Maryland, Illinois; parasite of 



Andrena erigeniae Robertson. 



Group 8. 



24. hippotes Pierce, 1909; Ohio; parasite of Andrena hippotes Rob- 



ertson. 



25. nasoni Pierce, 1909; Pennsylvania; parasite of Andrena nasoni 



Robertson. 



