10. 
EL 
2: 
13. 
INSECT ENEMIES OF EASTERN FORESTS 
TENEBRIONIDAE—Continued 
LOpmim=s-suncersbarksorwlogse 5) yoni ie oe pel Doliema 
Apices of prothoracic coxae nearly contiguous; mandibles dis- 
tinctly different; body texture, setae, and hypopharynx variable_ 
Body cylindrical, well sclerotized, terminal segment with small 
depressions, hypopharynx tricuspidate and with the median 
portion well extended and grooved at tip; submentum distinct; 
length to 20 mm.; under bark and in wood of decaying logs_ Uloma 
Body subeylindrical, soft; terminal segment without depressions; 
hypopharynx bicuspidate, submentum and gula fused; length 
to 6 mm.; in fungus and beneath bark of fungus-covered logs 
Hoplocephala (Arrhenoplita) 
Terminal segment armed with backward-directed, weak spines; head 
capsule provided with paired corneous projections; mandibles 
above articulating fossa bearing a similar corneous projection; 
hypopharynx bicuspidate; body fleshy; length to 20 mm.; in 
WW OO Cy pee UNO T ess Steen me ane peepee Mt ce, Bolitotherus 
Terminal segment armed with upward-directed, strong spines; 
invpophanyMxathiCuspidatexs 28 ses. Soil) fo ee ed 
Segment anterior to spines raised into a transverse, sclerotized, 
dentate unit; hypopharynx with median portion well extended 
and grooved at tip; length to 30 mm.; beneath bark and in wood 
Oflivingwdying-. and dead trees 2222 Feat os Strongylium 
Segment otherwise; hypopharynx with or without extension of 
TIN GHIA TAM | OMS UL OMe ert Mie ae OMe GA es ee. Met ig ee fn Se nes 
Terminal segment short, directed upward, provided with paired, 
strong, anteriorly recurved spines and articulates with preceding 
segment by means of lateral condyles; left mandible apically 
either nieOretnidentate=aes Sti Si ee ee ee 
Terminal segment otherwise; left mandible tridentate____________ 
Left mandible apically bidentate, with an additional tooth present 
along dorsal margin of cutting edge between apex and mola; 
cercus without prominent spines or projections at base on inner 
margin but often provided with a pair of small pits anterior to 
each one; length to 18 mm.; under bark of logs_______-_- Helops 
Left mandible apically tridentate, with an additional tooth along 
cutting edge; spines with prominent projections on inner margins 
near base, without pits anterior to them; length to 22 mm.; under 
aTke Ole @ Osea teres Se Rip eS ee en ah Haplandrus 
Left mandible without an additional tooth along dorsal margin of 
cuucmeredee between apex and mola... = -____-)_=s_ 22 === 
ertamandible provided with such a tooth. 2.2. ---_2.- 2225 _e == 
Body well sclerotized; hypopharynx having median portion well 
extended and grooved at tip; first pair of legs only slightly larger 
than other two pairs; ninth abdominal segment without small 
spines anterior to strong terminal pair; length to 30 mm.; under 
barkeandin=wood of decaying logs. _ 2. _.--=.- === -- Scotobates 
Body fleshy; hypopharynx without extension of median portion of 
sclerome; first pair of legs decidedly stronger than the rest; 
ninth abdominal segment with small seta-bearing spines anterior 
LOesthomoaberminal pair a5 22-4 Sete te =e 22 2 ae te 
Terminal segment with median pair of small seta-bearing spines 
bifid and larger than the others; back of mandible near articulat- 
ing fossa bearing a single seta; length to 40 mm.; under bark and 
in wood of decaying hardwood logs__----------- ee Be Merinus 
Terminal segment with median pair of spines simple; back of 
mandible near fossa bearing two setae; length to 30 mm. ; under 
bark and in wood of decaying hardwoods; a northern and western 
SDECIC See aE yee Leth See ae ee ee U pis 
217 
KEY TO LARVAE OF THE MORE COMMON WOOD- AND FUNGUS-INFESTING 
11 
13 
12 
14 
