INSECTS AFFECTI.\(; I'AKK AND WOODLAND TREES 350 



T. p i n i S;i\- in iHl- north. Dr J. B. Smith records the insect as Ijeinj,^ 

 present throuii^hout New Jersey when- it mines the tureen bark of dead or 

 d\ini; pines ami spruces. I )r I lopkins states tliat it is \ery common in 

 West Virginia under partl_\- hxiuL;'. dyiuL^- and dead l)ark of living, d\ing 

 and dead standing and fallen pines and .spruces. I le states that it infests all 

 of the pines and thit nativt; and introduced spruces and that it is widely 

 distributed. 



Natural enemies. 1 )r A. 1). ik)[)kins has reared several parasites from 

 this species. S j) a t h i u s canadensis (?) Ashm. was bred by him from 

 cocoons found in the mines of this insect in white pine and .S. p a 1 1 i il u s 

 Ashm. was reared In' him from cocoons occurring in the larval galleries 

 uniler the bark of scrul) pine. llister parallel us .Sa\- and H. 

 c \' 1 i n d r i c u s Payk were taken by i )r i loijkins in the ealleries of 

 this species. 



Bibliography 

 1890 Packard, A. S. \'. S. Km. Com. 5th Rcp't, p. 17 

 1899 Hopkins, A. D. W. Va. Agric Exp. Sta. Bui. 56, p. .284-344, 347, 422, 427, 



428 and 445 

 1903 Felt, E. P. I'or. Fish & (".amc Com. 7tli Rep't, p. 485-86 



Minute spruce bark beetle 



Cryptitrgus atoiiixs Lee. 



.\ minute, dark bark beetle about '/,6 incli in length, makes short sinuous mines 

 in tiie bark of spruce and [)ine. 



This is one of our smallest bark borers and in many instances is proba- 

 bly overlooked on this account. According to I)r Hopkins it enters the 

 galleries of other bark beetles, from which it excavates numerous very 

 small, irregular channels through the inner bark of dying and dead black 

 and red spruce and wliite pine. Ihe mine consists of a short, sinuous, pri- 

 mary gallery about y2 inch long from which arise on either side about 10 

 shorter secondary galleries. The beetles are sometimes extremely niuiier- 

 ous, many mines occurring within a square inch of surface. Dr Packard 

 records meeting larvae, pupae and beetles in great abundance at Brunswick 



