296 AGRICULTURAL REPORT. 



40. Genus MniotUta, (Vioill., 1816.) 



1. M. raria, (Linn.,) Vicill., black and white creeper. Migratory, frequent ; 

 insectivorous. " It lives principally on .small ants and their larvae," which it 

 mostly gleans from the rough bark of orchard and forest trees. 



41. Genus Parula, (Bon., 1838.) 



1. P. amtricana, (Linn.,) Bon., blue yellow-backed warbler. Migratory, 

 frequent ; insectivorous ; somewhat of a creeper ; very active and useful in 

 destroying small insi^cts during the opeuing bloom of spring. 



42. Genus Protonoturia, ^Bd., 1858.) 



1. P. ciirea, (Bodd.,) Bd., prothonotary warbler. Summer resident, ex 

 tremely rare ; insectivorous ; feeds on small insects, worms, caterpillars, &c. 



43. Genus Geoikli/jns, (Cab., 1847.) 



1. G. tricJias, (Linn.,) Cab., Maryland yellow throat. Summer resident, 

 frequent ; insectivorous. Lives secluded in thickets and coarse tangled grass 

 near streams where it feeds on small insects. " Caterpillars and spiders form 

 its principal food." (Aud.) 



2. G. Philadelphia, (Wils.,) Bd., mourning warbler. Summer resident, 

 extremely rare ; insectivorous ; habits resemble the former. 



44. Genus Oporornis, (Bd., 1858.) 



1. O. agilis, (Wils.,) Bd., Connecticut warbler. Migratory, very rare ; 

 insectivorous. Audubon saw them " chasing a species of spider which runs 

 nimbly over the water, and which they caught by gliding over it." 



2. O. tephrocoiis, (Kutt., 1840,) Michener's warbler. Migratory, very rare ; 

 insectivorous ; affects margins of woods, thickets, and old fences ; keeps near 

 the ground when seeking insects. 



Observation. — The type of this species was obtained by the -writer in the autumn 

 of 1839 in Chester county. It was described and published by Nuttall in the 

 following year. Some have doubted it being a good species, it being too near 

 O. agilis ; others suppose it to be genuine. I shall retain it for the present 

 Several specimens have been obtained. 



3. O. formosus, (Wils.,) Bd., Kentucky warbler. Migratory, very rare, 

 north of Maryland ; insectivorous. " This species destroys great numbers of 

 spiders." All the species are active insect-hunters, and affect the woods and 

 neighboring fields, orchards, and gardens. 



45. Genus Icteria, (Vieill., 1790.) 



1. I. viridis, (Gmel.,) Bon., yellow-breasted chat. Summer resident, fre 

 quent; insectivorous; affects thickets, near water, and feeds on shelly-winged- 

 beetles, sometimes on berries and seeds. 

 4G. Genus Htlmitherus, (Raf., 1819.) 

 1. H. verniivorus, (Gmel.,) Bon., worm-eating warbler. Migratory, or very 

 rare in summer; insectivorous. " They are very active and indefatigable in 

 sect-hunters." (Nutt.) 



47. Hchninthophaga, (Cab., 1S50-'51.) 



1. II. pinus, (Linn.,) Bd., blue-winged yellow warbler. Summer resident, 

 rare, and very secluded ; insectivorous, " They feed on the eggs and larvae of 

 various insects, as well as flies, caterpillars, ants, aud coleoptera." (Kutt.) 



2. II. chrysopiera, (Linn.,) Cab., golden-winged warbler. Migratory, quite 

 rare ; insectivorous. This scarce bird is only seen in spring, Avhen it frequents 

 the tops of forest trees, and collects its food among the leaves and branches. 



3. II. rvjicapilla, (Wils.,) Cab., Nashville warbler. Summer resident, very 

 rare ; insectivorous. " Its food consists of insects and larvre, which it procures 

 by searching actively and diligently among the leaves and buds of low trees." 

 (Aud.) 



4. //. peregrina, (Wils.,) Cab., Tennessee warbler. Migratory, very rare; 

 insectivorous ; " an expert catcher of flies." 



