"4 



NEW YORK STATE MUSEUM 



The adult Inirrows, in the smaller limbs just beneath the bark, are 

 usual])- nearly parallel with the L;rain of the wood and may extend a 

 distance of 3 or more inches. The irrei^-ular, serpentine burrows of the 

 yotmg are j^ inch or more apart, over H inch long and usually alternating; 

 on each side of the parental gallery. 



Pityogenes sp. a 



Another species of this genus, stated by Dr 



Hopkins to be a new form, was met with by the writer 



at Saranac Inn in August 1900. It was working in 



a nearly dead young pine antl its galleries are (juite 



dilierent from the following. The central cliamber is 



not (]uite so large, the egg notches a]>pear to be placed 



■:*j closer together, and the larval galleries do not groove 



' the wood so deejjly as a rule. The pupal cells are 



sunken much more deeply into the sapwood. b'igure 



,': jt) illustrates the work of this specit.-s. Ap])arentlv 



M the same insect was met Avith in another white pine 



f' Avhere it was associated with T o m i c u s caelatus 

 Lcc, and also in Ijalsam, where it occurred in comjjany 

 with the last named species and Tomicus I) a 1- 

 sam<'us Lee. This latter tree was dying and had 

 been alnmdantl)- infested by the bark borers. 



Pityogenes sp. b 



A small liL-etle, a little OAer ' '-,, iiii h in length, works in the bark of dead white ]iine 

 limbs. The ])rothora\ is dark brown, rather eoarsely tidierculate, while the wing ^o^■ers 

 are a lighter Ijrown, nearly smooth, and with two or three minute tulien les on the 

 dccli\ ilv of eac h. 



This species was met with by the writer Aug. 5, igoo, at .Slingerlands 

 N. v., where it was working on pine limbs which had e\'idently been 

 recently cut. Larvae and pupae were present and the insect had begun 

 operations only a little while before. Tomicus cacographus Lee. 

 was associated with this borer and also a species of H)'pophloeus. This 



y'lil. 70 Work- of Pi t y OS e 11 es 

 s]i. .1 ill \v!ii[e jiine (i:iri;iinLiI 1 



