4 STREPSIPTERA 



Host list. — The following are the known habits ol the species which have been studied : 



Myrmecolax nictnevi, Westwood, parasitizes an undetermined formicid; Ceylon. 



Stylops advarians. Pierce, parasitizes Andrena advarians, Viereck; British Columbia. 



Stylops andrcnoides, Pierce, parasitizes Andrtna audi euoides, Cresson: Illinois. 



Stylops aster idis, Pierce, parasitizes Andrtna asttris, Robertson; Illinois. 



Stylops aterrima, Newport, parasitizes Andrena irimmerana, Kirby; England. 



Stvlops bipunctatac, Pierce, parasitizes Andrena bipunclata, Cresson: Nebraska. Wisconsin, Indiana. 



Alabama. 

 Stvlops bruneri, Pierce, parasitizes Andrena illinoiensis, Robertson; Nebraska, Illinois. 

 Stylops californica, Pierce, parasitizes Andrena subiilis, Smith ; Southern California. 

 Stylops cliildreni, Gray, parasitizes Andrena viciiina. Smith ; Nova Scotia. 

 Stvlops clavtoniae, Pierce, parasitizes Andrena imitairix, Cresson; and its race claytoniae, Robertson; 



Georgia, Illinois, Texas. 

 Stylops claytoniae, var. vierecki, Pierce, parasitizes Andrena imitairix. var. profunda, Viereck; Texas. 

 Stylops cornii, Pierce, parasitizes Andrena commoda, Smith : Wisconsin. 

 Stylops crawfordi, Pierce, parasitizes Andrena araivfordi, Viereck; Texas. 

 Stvlops cressoni. Pierce, parasitizes, Andrena cressoni, Robertson; Maine. 

 Stylops dalii, Curtis, parasitizes Andrena labialis, Kirby; England. 

 Stylops dominiqnei, Pierce, parasitizes Andrena flessae, Panzer; France. 

 Stylops graemcheri, Pierce, parasitizes Andrtna nivalis, Smith; Wisconsin. 

 Stylops liartfordensis, Pierce, parasitizes Andrena nasoni harttordensis, Cockerell ; Georgia. 

 Stylops hippotes, Pierce, parasitizes Andrena hippotts, Robertson; Ohio. 

 Stylops mandibulars, Pierce, parasitizes Andrena mandibular is, Robertson; Illinois. 

 Stylops melittae, Kirby. parasitizes Andrena nigro-aenea, Kirby; England, German)', Hungary. 

 Stylops multiplicatae, Pierce, parasitizes Andrena nudtiplicata, Cockerell; Wisconsin. 

 Stylops nasoni, Pierce, parasitizes Andrtna nasoni, Robertson; Pennsylvania. 

 Stvlops nassonowi, Pierce, parasitizes Andrena carbonaria, Linnaeus; Germany, Egypt. 

 Stylops nubeculae, Pierce, parasitizes Andrena nubecula, Smith; Colorado. 

 Stylops nudat, Pierce, parasitizes Andrena nuda, Robertson; Illinois. 



Stylops oklahomae, Pierce, parasitizes Andrena flavoclypeata miserabilis, Cresson ; Oklahoma. 

 Stylops packardi, Pierce, parasitizes Andrena placida. Smith ; Massachusetts. 

 Stylops pilipedis, Pierce, parasitizes Andrena ■ pilipts, Fabricius; China. 

 Stylops polemonii, Pierce, parasitizes Andrena poltmonii, Robettson; Colorado. 

 Stylops salicijloris, Pierce, parasitizes Andrena salicifloris, Cockerel]; Washington. 

 Stylops solidulae. Pierce, parasitizes Andrena ■ solid ula, Viereck; Washington. 

 Stylops sparsipilosac, Pierce, parasitizes Andrtna sparsipilosa, Viereck; Maine. 

 Stylops spencii, Pickering, parasitizes Andrena tibialis, Kirby; England, German}'. 

 Stylops subcandidat, Pierce, parasitizes Andrena subcandida, Viereck; Southern California. 

 Stvlops swenki. Pierce, parasitizes Andrena solidaginis, Robertson; Nebraska, Pennsylvania. 

 Stylops thwaitei, Saunders, parasitizes Andrena afseliella, Kirby; England, France, German)*, Switzerland, 



Hungary. 

 Stylops ventricosae. Pierce, parasitizes A ndrena venlricosa, Dours; Hungary. 

 Stylops vicinae. Pierce, parasitizes Andrena vidua. Smith; New Hampshire, Massachusetts, Connecticut, 



Canada. 

 Hyhchtkrus quercus, Saunders, parasitizes Prosopis gibba, Saunders; Epirus. 

 Hylechthrus rubi, Saunders, parasitizes Prosopis rubicola, Saunders; Epirus. 



