INSECTS AFFECTING FARK AND WOODLAND TREES 



California, ranging as far south at least, as West Virginia. It probably 

 occurs in most places where pine grows. 



Bibliography 



1890 Packard, A. S. U. S. Ent. Com. 5th Rep't, p. 700-1 



Lesser pine borer 



Asemtim moestum Hald. 



A blackish brown beetle j4 to ^4 inch long occurs late in May on pine. 



The larva of this species makes flattened, cylindric holes or mines 

 which perforate the trunk of white pine and other trees in all directions. 

 It is rather small, and the blackish brown beetle, about x / 2 to 5/8 inch in 

 length, appears late in May. We have met with this small borer on hard 

 and white pine in May. Dr Packard states that this species appears to 

 attack healthy as well as diseased trees, and cites several instances of 

 injurious work. He finds that the exit holes are usually most abundant on 

 the south side of the tree or stump, and that in some cases they are very 

 numerous, as many as 10 occurring in a space of five square inches. The 

 larval gallery is deep, extending 6 or 8 inches toward the heart of the tree, 

 where it ends in an oval pupal cell. 



Description. The larva has been described in detail by Dr Packard, 

 who states that it is about y 2 inch long, and that the prothorax inclines 

 downward toward the head, being long and no wider than 

 the mesothoracic or metathoracic segments. Abdominal 

 segments rather broad, and on the two hinder thoracic 

 and first abdominal segments are transverse, regular, 

 oblong areas banded by impressed lines. On segments 

 two and four the callosities are narrower and pointed 

 anteriorly, on six and seven they are a little longer than 

 broad, contracted posteriorly. Smaller callosities occur on 

 the ventral surface. The true legs are minute, three- Fig. 190 a s e m u m 



1 11111 moestum, enlarged 



jointed, small and rather short. (original) 



The pupa is flattened, nearly y inch in length, somewhat broad and 



