POOD HABITS OF THRUSHES. 



15 



except by flycatchers and swallows, which take their food upon the 

 wing. The flies eaten by the olive-back are mostly crane flies 

 (Tipulidse) or March flies (Bibio), both in the adult and larval 

 state. Crane flies are slow of wing and frequent shady places. The 

 larvae of both groups are developed in moist ground, and often in 

 colonies of several hundred. With these habits it is not surprising 

 that they fall an easy prey to the thrushes. 



Hemiptera (bugs), a small but rather constant element of the 

 food, were found in the stomachs collected every month, and in July 

 reach 11.11 per cent. They were of the families of stinkbugs (Penta- 

 tomidse), shield bugs (Scutelleridse), tree hoppers (Membracidae), 

 leaf hoppers (Jassidse), and cicadas. Some scales were found in one 

 stomach. The total for the season is 3.76 per cent. A few insects 

 not included in any of the foregoing categories make up 0.48 per 

 cent of the food. Spiders, with a few millipeds, amount to 2.22 per 

 cent, the lowest figure for this item of any bird of the genus Hylo- 

 cichla. Snails, sowbugs, angleworms, etc. (0.32 per cent) , complete 

 the animal food. 



Following is a list of insects identified and the number of stomachs 

 in which found : 



HYMENOPTERA. 



Camponotus pennsylvanicus. 

 Tiphia inomata 



COLEOPTERA. 



Cychrus nitidicollis 



Cychrus stenostomus 



Notiophilus ceneus 



Pterostichus sayi 



Pterotichus lustrans 



Amara interstitialis 



Triwna longula 



Agonoderus pallipes 



Silpha ramosa 



Staphylinus cinnamopterus — 



Tachyporus californicus 



Chilocorus orbus 



Scymnus sp . 



Eister americanus 



Ips quadriguttatus 



Cytilus sericens 



Agriotes stabilis 



Podabrus flavicollis 



Podabrus modestus 



Silis lutca 



Telepliorus carolinus 



Telephones bilineatus 



Telepliorus divisus 



Onthophagus hecate 



Onthophagus striatulus 



Onthophagus tuberculifrons . 



Onthophagus sp 



Atwnius abditus 



Aphodius hamatus 



Aphodius fimetarius 



Aphodius inquinatus 7 



Aphodius sp 6 



Geotrupes sp 1 



Dichelonycha elongata , 2 



Lachnosterna hirticula 1 



Lachnosterna sp__. 12 



1 



1 



1 



1 



1 



1 



1 



______ 1 



1 



1 



1 



1 



1 



1 



1 



1 



1 



1 



1 



1 



1 



1 



1 



Anomala undulata 



Anomala sp 



Euphoria fulgida 



Donacia emarginata 



Hmmonia nigricornis 



Syneta pallida 



Leptinotarsa decemlineata _ 



Gastroidea sp 



Galerucella decora 



Diabrotica soror 



Diabrotica sp 



Gonioctena pallida 



Luperodes bivittatus 



Opatrinus notus 



Blapstinus metalllcus 



Blapstinus mcestus 



Dlcpstinus sp 



Otiorhynchus ovatus 



Thinoxenus sp 



Cercopeus chrysorrhwus 



Barypithes peUucidus 



Sitones flavescens 



Sitones sp 



Phytonomus punctatus 



Pachylobius picivorus 



Conotrachelus posticatus 



Micromastus elcgans 



Acalles clavatus 



Cryp torhynchus bisignatus- 

 Rhinoncus pyrrhopus 



