168 MISC. PUBLICATION 657, U. S. DEPT. OF AGRICULTURE 
KEY TO THE GENERA OF LAMELLICORN LARVAE IMPORTANT TO FORESTRY 
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EASTERN NORTH AMERICA—Continued 
Antenna without an ocellar spot at base; epipharynx with a narrow, 
chitinous semicircle between base of tubercle and the distal 
margin. In decayed logs or stumps or in sandy soil under dried 
manure. (Rutelinae) uc Ss aw oe eae oe eee Polymoechus 
Spines of lower anal lip hooked; claws tapering to a point; anterior 
margin of labrum entire and arcuate; left mandible without teeth 
between bidentate apex and molar structure__________________ 
Spines of lower anal lip not hooked; labrum distinctly trilobed; 
left mandible with 2 lateral teeth between bidentate apex and 
molar: StrMmetwre so - a N B ee 
Spines of raster plainly fewer in right row than left row. In sandy 
fields, dunes, pastures, etc. (Rutelinae)__________ Strigoderma 
Spines of raster approximately equal in number in each row_____~_ 
Rows of spines strongly curving toward head and with 6 or 7 spines 
in each row. In soil under turf, garden margins, parks, ete. 
(itutelamae) 2 fins 2 ais es Sepe egis e Popillia 
Rows of spines not strongly curving toward head and with 9 or 
more spines 1m’ Cach rows soe cheeks 2s ee ee ee 
Rows of spines with 9 to 10 in each row. In soil in pine stands, 
fields pastures, ete. -“Grutelinae)=22222 see ee Pachystethus 
Rows of spines with more than 10 (about 15) in each row. In soil 
of woods, pastures, lawns, etc. (Rutelinae)________-_ Anomala 
Lower anal lip with strong straight setae; raster with 2 convex rows 
of spines enclosing an elongate oval naked area. In sandy soil. 
(2) "(Cetomiinae)c2 oho aes Ses Che aide nat ee a CGymnetis 
Lower anal lip with minute, fine hairs; raster with a pair of jagged 
rows of rather inconspicuous spines; head chestnut-brown to 
blackish. In soil in open areas or under manure and decaying 
vegetation. -(Cetomimmac) aac i wen ae eat nee Cotinis 
Labrum symmetrical and trilobed; epipharynx with a curved 
single row of small teeth in median part of distal end; left man- 
dible with 2 lateral teeth between bidentate apex and molar 
SUPWCUUTE Ss fa Li oe Des eee a Sie Ue ea ye 
Labrum not symmetrical and not trilobed; epipharynx without a 
curved row of small teeth in median part of distal end, but with 
a dark, blunt) toothlike processsim its! places=—5 n= eee one 
Claw cylindrical and distinctly obtuse; teeth of epipharynx in one 
nearly semicircular row; raster well clothed with spines and setae 
which, in some species, may be arranged in irregular longitudinal 
rows. In old horse manure, sawdust, litter, ete. (Cetoniinae) 
Euphoria 
Claw short, thick, conical, and pointed; teeth of epipharynx in one 
slightly curved row; raster thinly clothed with large and small 
spines without order. In decayed tree cavities, stumps, snags, 
ete? CErichiinae 2s ees Seas See ee ee eee Osmoderma 
Stridulating teeth of maxillary stipes long, slender, pointed, and 
Curved.y seh Se ele Ses Dane) tees ee 
Stridulating teeth of maxillary stipes short, being as broad as long, 
often’ obtuse: not‘curved =o7 Se 2s a ee a eee 
Claws long, distally tapering to a point; spines of raster hooked; 
2 teeth on top of both left and right mandibles; setae around 
lateral margin of epipharynx distinetly flattened and increasing 
in length toward distal end; raster well clothed with setae and 
hooked spines. Jn sandy soil in open woodlands, fallow fields 
pastures; etc. (Rutelinae) === ae ae. Sa eee Cotalpa 
Claws short, evlindrical, slightly curved, distally obtuse; spines 
of raster not hooked; 3 teeth on top of left and 2 teeth on top of 
right mandible; setae around lateral margin of epipharynx short, 
strong, and pointing more or less downward, not out; setae on 
raster sparse. In decaying wood, especially still firm hardwood 
Stumps, (CR wtelimac)! 2 see ees oor oe ee eee Pelidnota 
With a single ocellar spot at base of antenna. In manure or 
heavily manured soils (Dy nastinae) = ee Ligyrodes 
Without’ ocellar spot at base of antennal: 222 a-eseeeeeees eee eee 
IN 
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