THE INSECTS OF NEW JERSEY. 
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MONARTHRUM Kirsch. 
M. fasciatum Say. Throughout the State V-VIII; bores into healthy and 
sick trees in great variety; deciduous and coniferous. 
IV!. mali Fitch. With the preceding, but more rare and with an even larger 
range of food plants, including apple; Anglesea IV, 23, brood found 
emerging from oak and other trees (W). 
GNATHOTRICHUS Eich. 
G. materarius Fitch. Grenloch, Iona V, 17, entering dying white pine 
(W); probably occurs wherever this tree grows in the State. 
PITYOPHTHORUS Eich. 
P. bell us Eich. Iona IV, 30, entering pine (W). 
P. minutissimus Zimm. Throughout the State in oak twigs, doing little 
or no damage. Adults may be cut out any time during the winter. 
P. pul I us Zimm. New Jersey (Jiil); Atco, rare on pine (W). 
P. fagi Hopk. New Brunswick, boring in oak twigs (Coll). 
P. sparsus Lee. Orange Mts., rare (Bf); mines in green bark of injured 
or dying pine trunks or branches and hastens death (Hpk). 
P. pulicarius Zimm. Bamber VI, 3 (W); Cape May C. H. VIII on pine 
(Sz); breeds in pine twigs (Hpk). 
P. puberulus Lee. New Brunswick (Coll); Bamber VI, 3, Anglesea IV, 
27 (W); Cape May C. H. VII (Sz); infests dying terminal twigs of 
pine. 
P. querciperda Sch. Hemlock Falls, rare (Bf). 
P. frontalis Hopk. Eagle Rock, rare (Bf); New Brunswick in oak twigs 
(Sm). 
There are at least four other undetermined and probably new species 
in collections. 
HYPOTHENEMUS Westw. 
H. ruficollis Hopk. Gloucester V, 13, Grenloch X, 15, Lahaway III, 26, 
cut out of peach, cherry, etc. (W). 
H. atomus Hopk. Westville II, 5, cut out of oak bark (W). 
H. eruditus Westw. Orange Mts. (Bf); New Brunswick (Sm); Anglesea 
VII (Sz); breeds in pith and wood of dead vines and twigs in great 
variety. 
H. hispidulus Lee. New Brunswick from hickory and oak (Sm); cut 
out of sumac (W). 
H. erectus Lee. New Brunswick from hickory and oak (Sm). 
The species are unsatisfactorily distinguished, and the last three may 
be partly confused or may represent more distinct forms. 
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