Dll'Tl'.KA ()!<■ .M1NN1-:S()T.\. i:,!) 



DEXIIDAE. 



Sniall. slender flies closely allied to the 'racliiiiichh\ and. like that 

 f.i'.rilv, parasitic upon various insects, notahlx' the beetles. 



Aldrich lists 165 North American species. We have taken in 



Fig. 154. Ptilodr.vici tibialis. Orisjinal. 



Minnesota: Dcxia icrfcbrata. Say.; Dc.via crciiiidcs. Walk.; Ptilodcxia 

 tibialis, Dcsz\ 



lilPPor.OSCIDAE. 

 Louse Flics. 



l'"ig. liiS. I'sKcdutfcrsia iiiaciilata. Lugger. 



When a l)oy the writer was much interested in ( )rnitholog^y. 

 and occasionalh- in his bird collecting" he would secure a si:)ccimen 

 ( particularh- would this be true of horned owls, as he r.'calls it) 



