108 BULLETIN 326, U. S. DEPARTMENT OF AGRICULTURE. 



A list of identified material taken from these stomachs follows : 



HBMIPTERA. 



Ormenis sp 



Tettigonia sp_ 

 Lecanium sp 



COLEOPTERA. 



OWirus sp 6 



Scymnus roseicollis 5 



Scymnillus sp 8 



Hyperaspis apicalis 2 



Litargus sp 1 



Cryptorhopalum sp 5 



Photinus sp 3 



Photinus vittatus 1 



Ptinus sp^ 1 



Leptostylus sp 7 



Cryptocephalus sp 20 



Cryptocephalus pusio 9 



Chlamys sp 2 



coleoptera — continued. 



Myochrous sp 



Ceratoma denticornis. 



Cliwtocnema sp 



Zabrotes sp 



Helops sp 



Lachnopus sp 



Euscepes porcellus 



Pseudomus sp 



Platypus sp 



Xyleoorus sp 



HTMENOPTERA. 



Wasmannia auropunctata 



ARACHNIDA. 



Tetragnatha sp. 

 Argyrodes sp — 



BLACK AMD WHITE WARBLER. Mniotilta varia (Linnaeus). 

 REINITAj Gusanero, Trepadora. 



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. Longieorn 

 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 19.58 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 : 



hemiptera. 



Ormenis sp. 



GOLEOPTERA. 



Endeitoma granulata. 

 Aulonium oldentatum. 

 Leptostylus sp 



coleoptera — continued. 



Lema sp 



Cryptocephalus sp. 



Metachroma sp 



Platydema virens 



Helops sp 



Euscepes porcellus . 

 Platypus sp 



