INSICCTS AFFECTINC. PAKK AM) WOODLAND TREES 367 



recorded bv Dr Packartl as occurrim^^ under the l)ark of |)ilcli ])ine and 

 balsam trc('s. He found lliis species abundant under the bark of a white 

 pine loLj at Salem Mass., in October, and states that he has frecpiently 

 detected it in the same situations in .Maine. lie obtained both the larvae 

 and adults Ap. 24. Dr Hopkins has recorded this species as minint,^ under 

 the bark of dvin-;- trees and states that it is common in X'ir^inia. He 

 records th(' j)resence of adults A]). 8, May 5, c», < )ct. 17, Dec. 19, and pujia 

 in October, and larvae (ul\' 14. lb' adds that it is a very common borer in 

 deca\"in^' jiine wherexcr the trees ^row in W est \ iri^inia. 



Description. This beetle is a orra\ ish insect, mottled with black, about 

 5/g inch lon<.(. Its general forms and markings are well shown on plate 64, 

 figure I. ihe ]:)rothoracic sjjines and the two prominent ridges on each 

 wing cover are the most characteristic features of this beetle. 



The pupa is white, rather stout, and varies in length from about }4 to 

 nearlv -^+ inch. The dorsum of the head, meso- and metathorax and each 

 alnlominal segment l)ear minute hairs or setae somewhat grouped on each 

 side of the dorsal line. The brown abdominal spiracles are conspicuous 

 [pi. 64, lig. 4]. 



Tile j)upal cell is constructed just under the; l)ark. It is oval, about ^2 

 by -)4 inches in diameter and is jiartly lint'il with somewhat decayed wood 

 particles. The most characteristic feature is the mass of fibers torn from 

 the wood at the bottom of the cell and incorporated in its walls | pi. 64, 

 fig. 7 |. The excavation in the wootl is probably necessary to give requisite 

 depth for the thicker pupa and beetle. This is in marked contrast to the 

 pujjal cells of P )■ t h o americanus Kirb\-, a species frequenll\- associ- 

 ated with Rhagium and which is noticed on page 368. 



The white llattened grui) or larva ranges in length from 3^ to 1 i/^ 

 inches and is remarkable for its broad head which is amber coloretl and is 

 fully as wide as the thoracic segments. Ihe powerful jaws are tipped with 

 black. The corneous prothoracic shield is yellowish, and the six true legs 

 are poorly developed [pi. 64, fig. i i]. 



Life history. Some larvae, pupae and many beetles were found under 



