21. 
22. 
23. 
24. 
20: 
26. 
27. 
28. 
29. 
30. 
36. 
37. 
38. 
39. 
40. 
INSECT ENEMIES OF EASTERN FORESTS 
KEY TO THE FAMILIES OF MORE IMPORTANT BEETLE LARVAE—Continued 
Ventral mouth parts retracted considerably behind a line between 
fMHenventralgmandibulararticulations:. 902.2. 2). 85.) wis 1 
Ventral mouth parts not retracted; predaceous forms_____ Cleridae 
Lacinia armed with spurs; body hairy._____________ Dermestidae 
acimiaawat toutes punserise =o ese ee 
Mplcramalesuuureswelledeveloped. 42.2522. 22 -22..218 0 Melyridae 
Dpicranialesuvuremearly absent. = 292029 se. 2. ey ta Ostomidae 
Ventral mouth parts retracted considerably behind a line between 
the ventral mandibular articulations; molar or grinding structure 
Ofgthe mancdiblesusuallyapresents. soe s 2). eee Gee So 
Ventral mouth parts not retracted; larvae soft skinned, fleshy; wood 
borers molaristructure absent... 25-2 2 2 ss Cerambycidae 
Spiracles on tubular process; sap feeders_____________ Nitidulidae 
Spinaclessnotenoticeablywonojecting 422240205) oe 
Free living predaceous forms crawling about on bark or foliage: 
three ocelli present on each side of head___.._____ Coccinellidae 
Concealed}torms under bark or in wood or fungis 2.) 22 
Form very depressed, about twice as wide as thick; adapted to living 
between bark and wood; clypeus and front often fused________ 
EORMOSTINOTE RO WU St eree ara tees oy a ae a oe od pe 
Cardo not composed of two pieces; mala falciform; hypopharynx 
WACMOUIbeaC MCN ZA GIOM ee ee aa ye eae Cucujidae 
Cardo of two pieces; mala obtuse; hypopharynx chitinized________ 
Kighth and ninth abdominal segments nearly equal; a single pit 
present between terminal spines; asperities on venter of ninth ab- 
dominal segment arranged in a broken arch___________ Pythidae 
Eighth abdominal segment at least twice as long as ninth (terminal 
spines excluded) ; a pair of pits present between spines_________ 
Ninth abdominal segment with asperities on venter arranged in a 
Simelepanc liven eee err se a See Pyrochroidae 
Ninth abdominal segment bearing a series of small chitinized plates 
ING ACCIOMAS DEMIUICSi 2 sete ee Lhe ek Boridae 
Mandibles with a reduced, smooth molar structure; somewhat resem- 
bling the mandibles of the Cerambycidae___-__--._. Melandryidae 
Mandibles wath- normal molar structure_2.---- 222-8 ee 
Cardogolearsimgleypleces 239s Ses Re Eee ee ee 
CanclopoletwOrole cess sets | ke ek ee es ee 
Ninth abdominal segment bearing spines, latter with pit between 
TRONS EONS a a Sp Pca a my ay er eggs Ome PO Beta es cer 
Ninth abdominal segment with or without spines, when present pit 
WAIN oDehWECNEMAnSINS 2% 42 2 =e tes Pe ee ee ees ee ee 
Rerminalespimes bifurcat@s 222-2222 ello 0248s 22 8 Othniidae 
Acerimnalepines.slmpleme 22 = 2) 2 tS ee Colydiidae 
Antenna inserted close to mouth frame; apices of prothoracic coxae 
USUI Tava OTAGO OUIS mye eee Ecc he Se Ea ee ae a eee 
Antenna inserted some distance from mouth frame; apices of 
PLOLMOLACIC COxaecyseparateds 25.222 _ 22-2 eae Lagriidae 
Back of mandibles opposite cutting edge, sharp; body cylindrical; 
terminal segment without spines and usually bluntly rounded 
Alleculidae 
Back of mandibles rounded; body rarely cylindrical; terminal seg- 
MME MURONLCMRATIAC Gent. kegs Ue ee ee Tenebrionidae 
Second to fifth abdominal segments with venter bearing asperate 
ATMO UAC eens Riemer tebe eo ae 2s eee as Oedemeridae 
Abdominal segments normal, without ampullae_____-_---------- 
Ninth abdominal venter bearing a pair of conical points 
Synchroidae 
Ninth abdominal venter simple, without such points______------- 
Submentum and gula fleshy; terminal segment with well-chitinized 
STOIC Seema aye ee yee pag ei eer oe Bee MN ak Pe Zopheridae 
Submentum and gula fused and heavily chitinized; terminal segment 
WACURSORL WTO rSDIMNeSr a) A ale ce chee oe Cephaloidae 
Hypopharynx chitinized; mandibles with a molar or grinding struc- 
A UIETs Pot se tina eae ONY Fe nee gee te he) SM ge a ee 
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