REVISION OF STREPSIPTERA PIERCE. 91 



Triungulinid. Body oblong, slightly narrowing posteriad. Tenth 

 segment medianly cleft, forming two tubercles, each bearing a long 

 stylet (Nassonow, 1893 a). 



The genus contains the following species: 



1. melittse Kirby (1802), parasitic on Andrena nigro-senea Kirby; 



England, Germany, Hungary. 



2. dalii Curtis (1828), parasitic on A. labialis Kirby; England. 



3. cMldreni Gray (Griffith, 1832), parasitic on .4. victima Smith; 



Nova Scotia. 



4. spencii Pickering (1835), parasitic on A. tibialis Kirby; England, 



Germany. 



5. aterrima Newport (1847), parasitic on A. trimnn ratia Kirby; 



England. 



6. thwaitei Saunders (1872), parasitic on A. afzeliella Kirby; Eng- 



land, France, Germany, Switzerland, Hungary. 



7. advarians Pierce, parasitic on A. advarians Viereck; British 



Columbia. 



8. bipunctatse Pierce, parasitic on A. bipunctata Cresson; Nebraska 



Wisconsin, Indiana, Alabama. 



9. bruneri Pierce, parasitic on A. illinoiensis Robertson; Nebraska, 



Illinois. 



10. calif ornica Pierce, parasitic on A. subtilis Smith ; Southern Cali- 



fornia. 



11. claytonise Pierce, parasitic on A. claytonise Robertson; Georgia, 



Illinois. 



12. cornii Pierce, parasitic on A. commoda Smith; Wisconsin. 



13. craivfordi Pierce, parasitic on A. craiqfordi Viereck; Texas. 



14. cressoni Pierce, parasitic on A. cressoni Robertson; Maine. 



15. dominiquei Pierce, parasitic on A.Jlessse Panzer; France. 



16. grsenicJieri Pierce, parasitic on A. nivalis Smith; Wisconsin. 



17. hartfordensis Pierce, parasitic on A. hartfordensis Cockerell; 



Georgia. 



18. hippotes Pierce, parasitic on A. hippotes Robertson; Ohio. 



19. imitatrix Pierce, parasitic on A. imitatrix Cresson; Texas. 



20. multiplicatse Pierce, parasitic on A. multiplicata Cockerell; Wis- 



consin. 



21. nasoni Pierce, parasitic on A. nasoni Robertson; Pennsylvania. 



22. nassonowi Pierce, parasitic on A. carbonaria Linnaeus; Germany, 



Egypt. 



23. nubeculse Pierce, parasitic on A. nubecula Smith; Colorado. 



24. packardi Pierce, parasitic on A. placida Smith; Massachusetts. 



25. polemonii Pierce, parasitic on A. polemonii Robertson; Colorado. 



26. salicijloris Pierce,- parasitic on A. salicijloris Cockerell; Wash- 



ington. 



27. solidulse Pierce, parasitic on A. solidula Viereck; Washington. 



