INSECTS AFFECTING I'AKK ANU WOODLAND TKEES 68 1 



Pine leaf miner 

 Pciralcchia piiiifoliclla Chamb. 



A small cylindric larva mines tiic leaves of various species of pine. 



This small leaf miner is common on hard pine at Karncr and the same 

 is undoubtctlly true in other sections of the State wht^re tiiis tree occurs. 

 The tip of the leaf and in many instances the larger portion above its base 

 is mined, dies and turns brown [pi. 20, fig. 5 ]. 



Description. The motli is very small, brownish, irregularly gray banded 

 with a wing spread of 3^ inch, and may be recognized by reference to plate 

 20, figure 23. The &^<g has been described as reddish brown, globular, 

 about .14 mm in diameter. The larva is '/V, inch long, yellowish brown with 

 the head, thoracic shield and anal plate dark brown. 



Life history. A single needle apparently affords ample sustenance for 

 the development of the larva, which enters near the middle of the leaf and 

 burrows toward the end, and then, reversing its course, proceeds toward the 

 base. The borings are pushed out at the point of entrance. Professor 

 Comstock states that there are certainly two and possibly three genera- 

 tions annually. 



Natural enemies. This leaf miner is subject to attack by a number of 

 parasites, notably several minute Chalcids and a small Tachina fiy. 



Bibliography 

 1880 Comstock, J. H. U. S. Dep't Agric. Rep't 1879, p. 238-41 

 1890 Packard, A. S. U. S. Ent. Com. 5th Rep't, p. 793-97 

 1903 Felt, E. P. For. Fisa & Game Com. 7th Rep't, p. 509-10 



Pine tube builder 



Eulia politana Haw. 



Peculiar tubes of webbed-together pine needles occur in midsummer and in 

 September on white and probably other pines. 



This insect is rarely abundant and is worthy of notice largely because 

 of the peculiar tubes it constructs among the pine needles. These consist 

 of about 15 needles, which are bound together by silken threads, and the 



