1928] 
Arthropod Fauna of Coniferous Leaders 
217 
THE ARTHROPOD FAUNA OF CONIFEROUS LEADERS 
WEEVILED BY PISSODES STROBI (PECK).* 
By Raymond L. Taylor. 
An interesting feature of a study of the bionomics of the 
white pine weevil, Pissodes strohi (Peck), is the varied fauna 
found associated with it under the same general ecological con- 
ditions. Many of these forms bear the very definite relation- 
ship of parasite and host or predator and prey, but there remains 
a number of coexistent species which show no obvious connection 
with the weevil. This paper deals with the latter group. 
In the course of dissecting a large number of the weeviled 
terminal shoots of the white pine, Pinus strohus, Scotch pine, P. 
sylvestris, and Norway spruce, Picea excelsa , but principally 
while breeding out parasitic forms, an incidental series of 90 
spiders, mites and insects was obtained. The majority of the 
miscellany treated herein represent the captures on or near a 
scrim screen in the window of a room in which 2602 leaders 
weeviled the previous summer were confined. The primary pur- 
pose of this breeding room was to obtain a large number of the 
insect parasites of Pissodes with a minimum of labor and breeding 
apparatus. Most of the fauna from this room were taken under 
conditions which, perhaps, do not establish conclusively that 
they were from the shoots, but it may be said that the breeding 
room was empt}^ except for the shoots, and all doors and cracks 
were sealed with gummed paper strips. It was, in general, made 
tight to prevent the escape of the desired parasites. It would 
seem, at least where species were numerous, that origin in the 
leaders is indicated. Fauna obtained from smaller cages, with 
no possibility of other origin, are noted as from localities other 
than Massachusetts. 
This list is presented for what value and interest it may be 
worth. All specific determinations were made by specialists in 
the various groups. The following key will show by whom the 
determination was made, the abbreviation being enclosed in 
brackets in each case after the specific name. 
Contribution from the Entomological Laboratory of the Bussey Institu 
tion, Harvard University, No. 301. 
