60 BIRDS OF CALIFORNIA AFFECTING FRUIT INDUSTRY. 
HEMIPTERA. 
Sinea diadema. Naissetia oler,. 
Remains of insects belonging to the following families were found, 
but not further identified : 
COLEOPTERA, 
Carabidee. Bruchide. 
Hydrophilidie. Tenebrionide. 
Staphylinidre. Anthicidee. 
Coccinellidre. Curculionidie. 
Elateridie. Scoly tide. 
Scarabeidi. Other Rhynchophora. 
Chrysomelide. 
DIPTERA. 
Muscidae. Tipulide. 
HEMIPTERA. 
Emesidee, Corimelenide. 
Reduviide. Scutellerids. 
Aradide. Jasside. 
Capside. Membracide. 
Lygeide. Psyllidee. 
Pentatomide. Coccide. 
WESTERN HOUSE WREN. 
(Troglodytes acdon subspp. ) 
The western house wren, like its eastern relative, is a common 
resident about outbuildings and other structures that offer suitable 
nesting sites and good foraging ground. In its general appearance 
and habits it is so like the Bewick wren that the casual observer is 
likely to confuse the two. Like other members of the family, it is 
largely insectivorous and rarely eats vegetable food. 
Only 36 stomachs of this species from California are available for 
examination, but the character of the food agrees so nearly with that 
of the eastern form that the general results obtained from the study 
of that subspecies may be applied to the western bird. 
Animal food.—In the 36 stomachs examined animal matter, con- 
sisting entirely of insects and spiders, formed 97.5 percent, and vege- 
table food 2.5 percent. Beetles, as a whole, amount to about 20 per- 
cent; caterpillars, aggregating 24 percent, are taken in ‘the earlier 
months of the year; and Hemiptera, amounting to 33 percent, are 
eaten chiefly in the last of the season. Grasshoppers amount to about 
5 percent, and different insects, mostly ants and other Hymenoptera, 
aggregate 15 per cent. 
Vegetable food.—The vegetable matter consists of rubbish and one 
grass seed, probably all of it swallowed accidentally. 
