Biological Papers. 



383 



Empidid^. 



Drapetia flavida Will. 



latipennis Mel. (Homotype.) 

 flaviceps Will. (Cotype.) 



Paralhalassius aldrichi Mel. 



Thinodromis inchoata Mel. 



Hilara nugax Mel. 



Rhamphomyia sociabilis Will. 



PHORIDiE. 



Aphiochaeta halictorum Mel. & Brues. 



longifrons Brues. (Metatype.) 



Platypezid^. 

 Callimyia venusta Loew. 

 Calotarsa calceata Snow. 



ornatipes Towns. 

 Platypeza abscondita Snow. 



cinerea Snow. 



pulchra Snow. 



tEeniata Snow. 



umbrosa Snow. 



unicolor Snow. 



PlPUNCULID^. 



Pipunculus fuscitarsis Adams. 



Syrphid^. 

 Microdon lanceolatus Adams, 

 melanogaster Snow, 

 pallipennis Snow, 

 violens Towns, 

 xanthophilus Towns. 

 Callicera montensis Snow. 

 Nausigaster scutellaris Adams. 

 Chilosia chalybescens Will. 



lucta Snow. 



nigrripennis Will. 



tarda Snow. 



willistonii Snow. 

 Chalcomyia serea Loew. 

 Baccha bella Will. 

 Platychirus palmulosus Snow. 

 Melanostoma coerulescens Will, 

 concinnum Snow, 

 kelloggi Snow. 

 Syrphus creper Snow. 



disgregus Snow. 



montivagus Snow. 



puUulus Snow. 



ruficauda Snow. 

 Xanthogramma habilis Snow. 

 Sphserophoria melanosa Will. 

 Brachyopa cynops Snow. 

 Volucella apicifera Towns. 

 Eristalis montanus Will. 

 Tropidia incana Towns. 

 Helophilus dychei Will. 

 Mallota albipilis Snow. 

 Criorhina lupina Will. 

 Spilomyia kahlii Snow. 

 Ceria snowi Adams. 



CONOPID^. 



Conops bellus Adams. 



fumipennis Adams. 



semifumosus Adams. 



gracilis Will. 



sylvosus Will. 



xanthopareus Vv'ill. 

 Physocephala affiniS Will. 



burgessi Will, 

 fureillata Will. 

 Zodion abitus Adams. 



bieolor Adams. 



parvum Adams. 



pictulum Will. 



pygmseum Will. 



scapulare Will. 

 Stylogaster neglecta Will. 

 Dalmannis picta Will. 

 Oncomyia baroni Will, 

 modesta Will. 



modesta, var. melanopoda Will, 

 propinqua Adams. 

 Myopa pictipennis Will. 



pilosa Will. 



plebeia Will. 



tectura Adams. 



Tachinid^. 

 Phorantha occidentis Walk. 

 Alophora senoventris Will. 

 Euscopolis dakotensis Towns. 

 Trichopoda subcilipes Towns. 

 Ceratomyiella conica Towns. 

 Rhinophora mexicana Towns. 



valida Towns. 

 Anisia vanderwulpi Towns. 

 Euryceromyia robertsonii Towns. 

 Hypostena floridensis Towns. 



indecisa Towns. 

 Hyalurgus johnsoni Towns. 

 Polidea americana Towns. 

 Eumyothyria illinoisensis Towns. 

 Leucostoma atra Towns. 



?neomexicana Towns. 



senilis Towns. 

 Clytiomyia flava Towns. 

 Xanthomelana atripennis Say. 

 Epigrymyia floridensis Towns. 



geniculata Towns. 



lucens Towns. 



polita Towns. 



robertsonii Towns. 

 Ginglymyia acrirostris Towns. 

 Plagiprospheryas floridensis Towns. 



parvipalpos Van der W. 

 Plagia aurif rons Towns. 

 Siphoplagia anomala Towns. 

 Goniochaeta plagioides Towns. 

 Chsetoglossa picticornis Towns. 



violas Towns. 

 Pachyophthalmus aurifrons Towns, 

 floridensis Towns. 

 Pseudotractocera neomexicana Towns. 



