108 



U. S. DEPARTMENT OF AGEICrLTX'EE. 



A list of identified material taken from these stomachs follows 



KEMIPTEP.A. 



Ormenis sp — 

 Tettigonia sp. 



Lecanium sp_. 



COLEOPTERA. 



OlCbrus sp 



Scymnus roseicollis 



Scymnillus sp 



Eypera&pis apicalis 



Litargus sp 



Cryptorlwpalum sp 



Photinus sp 



Photinus vittatus 



Ptinus sp 



Leptostylus sp 



Cryptocephalus sp r_ 



Cry pyocephalus pusio 



CTdamys sp 



coleopteea — continued. 



Myochrous sp 



Ceratoma denticornis. 



Chcotocnema sp 



Zaorotes sp 



Helops sp 



Lachnopus sp 



Euscepes porcellus __. 



Pseucomus sp 



Platypus sp 



Xi/7e6o?-iv? sp 



HYMEXOPTERA. 



TTasmamiia auropunctata 



Ar.ACHXIDA. 



BLACK AXD WHITE WARBLER. 



REINITA, GrSANEBCh Trepadora. 



Tetragnatha sp. 

 Argyrodes si _- 



Mniotilta varia (Linnaeus ). 



The black and white warbler is a winter visitant to Porto Rico, Vieques, and 

 Culebra Islands. The species was common the middle of December, though 

 apparently migration was still going on, and the last bird for the spring was 

 noted at Salinas April 30. This species frequents all forest growth and shade 

 trees about houses, creeping up and down tree trunks and working through the 

 limbs after insects. 



Food. — In 11 stomachs which were critically examined animal matter amounts 

 to 100 per cent. The months from December to April, with the exception of 

 February, are represented in this small series. Earwigs were eaten by five 

 birds and come to 8.5 per cent. Orthoptera are represented in four cases and 

 make up 27.06 per cent. Walking sticks were taken twice and a grasshopper 

 once. Lantern flies, found in three birds, amount to 8 per cent, and other bug 

 remains to 0.75 per cent. Beetles form the largest portion of the food and are 

 found in larger or smaller quantities in all the stomachs examined. Longicorn 

 beetles come to 5.61 per cent, leaf beetles to 1.06 per cent, and darkling beetles 

 to 1.37 per cent. Scarred-snout weevils were eaten by three birds and amount 

 to 8.17 per cent, while other weevil remains were encountered in eight stomachs 

 and total 19.5S per cent. Engraver beetles (Platypus sp.) were taken by this 

 species, as well as by others previously mentioned. Other beetle remains come 

 to 4.92 per cent. Lepidoptera (5.63 per cent) are represented by two moths, a 

 caterpillar, and a pupa. Hymenoptera were taken in small numbers by two 

 birds, but only comprise 0.56 per cent of the total. Spiders form 8.79 per cent. 



The black and white warbler is thus a useful species. The large number of 

 weevils destroyed by the few examined is noteworthy, as are the percentages 

 denoting the quantities of Orthoptera. lantern flies, and miscellaneous beetles 

 eaten. 



The following were identified in these stomachs : 



eim:?:zea. 



Ormenis sp. 



COLEOPTZP.A. 



Endeitoma granulata. 

 Aulonium lidentatum. 

 Leptostylus sp _. 



coleoptera — continued. 



Ifrna sp 



Cryptocephalus sp 



Metachroma sp 



Platydema rirens _ 



Eelops sp 



Euscepes porcellus 

 Platypus sp 



