LARV.E OF THE PRIOXIX.^. 17 



Posterior area of pronotum rugose, eusternal area not distinct in 

 front. Pleural disc rugose, most distinct on first four segments. 

 Abdominal spii^acles oval. 



Described from one specimen in the United States National 

 Museum, from San Jose, Cal., collected in white oak by ^irs. A. E. 

 Bush (Bureau of Entomology, No. 2412). 



Ergates spiculatus Lee. 



Form robust, nearly cylindric, slightly tapering posteriori}'; texture 

 leathery, finely rugose. 



Epistoma more or less produced oyer clypeus for entire width, 

 more so at extremities; front projecting in four large, round, shming, 

 blunt teeth. Mandibles acutely triangular from side, rugose, upper 

 inner face dully striated. Three indistinct ocelli. Labrum cord- 

 ate, tapering anteriorly, longer than wide, front edge ciliate. Anten- 

 nal joints thick, short, last joint cylindric, little longer than thick; 

 palpi elongate conical, last joint yery short, acutely conical, that of 

 maxillary palpi shorter than labial; labial palpi widel}' distant at base. 

 Subfossal spme acute, conical; postcondylar carina prominent, acute 

 edged. 



Posterior area of pronotum finely rugose. Eusternal area of pro- 

 thorax distinct. 



Pleural discs visible on six abdominal segments, though distmct 

 on but tliree of them, finely rugose, not radially striate. Abdominal 

 spiracles narrowly oval. Anal lobes rugose, bearing a few slender 

 hairs. 



Pupa: Form as in adult; head glabrous; disc of pronotum smooth, 

 remainder finely rugulose; mesonotum and metanotum glabrous, 

 transversely A\Tinkled; abdominal tergites rather thickh^ beset with 

 coarse chitinous asperities; the anterior margin of third, fourth, fifth, 

 and sixth segments bearing a curved carina, under which fits a pro- 

 jection from posterior margin of anterior segments; last tergite ending 

 dorsally in two short, conical, fleslw protuberances. 



Range: Throughout the western United States and Canada, and 

 eastward through the Rocky Mountains. 



This larva attacks only dead or decay mg coniferous logs. The 

 mines are very large, extending through both sapwood and heart- 

 wood. The principal flight of the adult is in July and August. 



Tragosoma harrisii Lee. 



Epistoma projecting over clypeus in two distinct triangular lobes; 

 front of head carinate, divided into four flat, dentate teeth, edge acute. 

 Mandibles as in Ergates, though shorter. Labrum cordate, longer 

 than wide, anterior edge ciliate, the cilia fine and sparse. Three or 

 four prominent regular ocelli. Antennae short, conical, last joint 



