2 ENTOMOLOGICAL NEWS [Jan., '2O 



in May and June, being usually found on a white birch fungus 

 and that Mr. Daecke bred it from such a fungus. 



During the winter of 1918-19, the larvae of this beetle 

 were very abundant in Polyporus betulinus at Morristown, 

 Oradell and Monmouth Junction and in Daedalea confragosa 

 (Bol.) Fr., at Monmouth Junction and High Bridge, all 

 localities in New Jersey. Both of these fungi are members 

 of the family Polyporaceae and are common in New Jersey, 

 the former occurring on birch and the latter on dead wood 

 or on living trees, especially of willow. Polyporus betulinus 

 on account of its white color is more conspicuous and not as 

 likely to be overlooked as D. confragosa. 



Both the larvae and adults feed on the context and tubes 

 and when numerous the fungus is completely riddled. Pupa- 

 tion takes place in the context in a little chamber excavated 

 by the larva and requires about ten days, usually occurring 

 during the last of April or in May. On account of its hairi- 

 ness, the larva is usually covered with particles of fungus as 

 is also the beetle as it works in the context. Beutenmueller 

 (Entomologica Americana VI, 1890, p. 57) states that eggs 

 are deposited during the fall and that adults emerge the 

 following spring, the larvae becoming full grown in May. 

 Beutenmueller also describes the larva and pupa and his 

 descriptions may be supplemented by the following addi- 

 tions: 



Larva. Cervical shield and anal process sometimes brownish. Head 

 sparsely hairy. The fork-like process on the posterior extremity consists 

 of a pair of prominent tubercles borne on a suboval, dorsal, chitinous 

 plate on the ninth abdominal segment; each tubercle consists of a thick, 

 central spine bearing five smaller ones; a long hair arises from the bases 

 of the smaller ones. The chitinous plate is edged with minute tubercles 

 each bearing a long hair and minute, similar tubercles occur on its sur- 

 face. 



Thoracic legs sparsely hairy and armed with a sharp claw at tip. Ab- 

 dominal segments somewhat produced laterally into tubercles. Kach 

 thoracic and abdominal segment bears a thin, transverse, dorsal row of 

 comparatively long hairs, with the lateral hairs longest; these rows of 

 hairs are continued on the ventral abdominal surface. All hairs arise 

 from somewhat tuberculate bases. Abdominal stigmata are located just 

 above lateral tubercles. Length 6 to 9 mm. Width 2 to about 3 mm. 



